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sliding | Engine rebuild/upgrade project | ||
Senior Guru
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I've started several threads asking all sorts of questions about my engine rebuild, so I thought to open a new topic where I'll post all progress and pics.
So here we go. As you know, after one hard start and revving the engine to almost 7k rpm, valves on the piston nr.8 broke (or probably first hit the piston and then broke) and destroyed the piston, bent the rod, destroyed cylinder wall......... This is what I first saw after removing SR lid This are pics of destroyed head and broken piston After seeing this, only thing left to do was to pull the engine and check for other damage and see what could be reused. Here is the damage to the cylinder wall First i was thinking about "sleeving" a block, but after closer inspection I've discovered cracks on cylinder wall that go all the way from the bottom to the top of cylinder. This means a different block is a must. I allready have a block that I planned to use for my 383 build, but I think that I'll use it for this engine now and wait for another block to come along for 383. And this is where I am now. I need to prepare all the parts that I bought (I'll post that later on) and take everything to the machine shop. While the block will be machined, I'll port the heads and the intake. Also I'll have to have crank checked if it's good to go with polishing only or if it'll need to be machined for oversized bearings. Crank will also need to be balanced because I'll use new rods and pistons. The work have just started, but I plan to do everything slowly and thoroughly. |
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Posted on: 2009/9/20 14:02
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pr0zac | Re: Engine rebuild/upgrade project | ||
Elite Guru
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why dont you just do the 383 now? buy the time you get done messing with the crank you will have the price of a new crank.. and if you need rods pistons and a rebalance. why not.. scat 9000 cranks are like $250 and will take quite a beating.
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Posted on: 2009/9/20 16:44
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96 lt4. 357ci, 11:1, LE 226/232, LE2 LT4 heads, ported LT4 intake, EM Gladiator44, EM LT's, stock exhaust, NX kit. |
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Durango_Boy | Re: Engine rebuild/upgrade project | ||
Elite Guru
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I agree, if you're doing crank work, new rods, and new pistons, you're already spending what it would cost to make a 350 a 383.
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Posted on: 2009/9/20 16:52
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bogus | Re: Engine rebuild/upgrade project | ||
Grand Imperial Pooh-Bah
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there were metal bits in the SR... the motor flat out exploded. damn.
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Posted on: 2009/9/20 17:27
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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I won't do the 383 now because I don't wan't to do it half way and I don't have the money for doing it all the way now. I allready have Callies Dragonslayer crank and Carrillo rods for 383 but I don't have anything else.
What would I have with top built bottom end and #113 heads and superram on top of it? This way, I'll build a good 350 (0.020" overbored"), drive it for a while, and when I'll have 383 fully done I'll just swap it into my vette and use 350 for another car perhaps. And I allready have all the parts for 350. Except the crank. I plan to use the stock one. |
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Posted on: 2009/9/20 17:43
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'90 L98 auto with a lot of mods |
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Here's a little update.
I haven't done much, but I spend as much time as i can on this. I've cleaned the "new" block, applied anti-corosion layer, painted with primer and with orange metal enamel. I did'n clean the block inside thoroughly, I'll do that after the machining. Here are a few pics: While I'm waiting for the torque plate to be machined, I'k cleaning and preping the pistons. |
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Posted on: 2009/11/7 14:45
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'90 L98 auto with a lot of mods |
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pianoguy | Re: Engine rebuild/upgrade project | ||
Guru Emeritus
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Ufffda, that was a mess! Good luck with the new one!
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Posted on: 2009/11/7 23:40
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1996 LT4 �Before you criticize someone, you should walk a mile in their shoes. That way when you criticize them, you are a mile away from them and you have their shoes.�- Jack Handey |
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Matatk | Re: Engine rebuild/upgrade project | ||
Webmaster
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Good start! What did you clean the pistons with?
Matthew |
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Posted on: 2009/11/8 14:58
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Thanks!
I've cleaned the pistons with gasoline (soaked them in for a while) and scotch brite (finest grade). |
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Posted on: 2009/11/8 15:30
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'90 L98 auto with a lot of mods |
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bogus | Re: Engine rebuild/upgrade project | ||
Grand Imperial Pooh-Bah
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I am still brain faded by the 7000 RPM rev!
Looks great!!!! Are you doing the 383 now? |
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Posted on: 2009/11/8 18:38
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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No. I'm doing a budget 350, .020" overbore. It will have to be good for a year or two, while I'll build 383. Then I'll swap 383 into my vette and this one will go into something else.
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Posted on: 2009/11/8 20:01
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'90 L98 auto with a lot of mods |
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bogus | Re: Engine rebuild/upgrade project | ||
Grand Imperial Pooh-Bah
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So... I am curious... how does someone from Croatia get all into American cars???
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Posted on: 2009/11/8 21:13
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Good question! I wish that I knew the anwser.
Actually, I've driven about 10 euro cars before vette. That were all small cars with small engines (mostly 2 litre). Then, I was given an opportunity to test one '85 corvette, and that was it. I just loved it. I was totally impressed with it's performance (have in mind that it was almost 10 years ago) and I decided to buy Corvette. That '85 was in bad shape so I waited a little and searched, and finally this one came up. It was completely stock and from first owner who moved from Canada to Croatia. |
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Posted on: 2009/11/8 21:50
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bogus | Re: Engine rebuild/upgrade project | ||
Grand Imperial Pooh-Bah
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Fascinating.
I never realized you were a native of Croatia. Your English is VERY good. In fact, better than many Americans I know! So... who moves from Canada to Croatia??? That's an equally good question. But I do know the answer to your question. You were seduced by torque. It's something that comes in bucket loads with American V8 cars. And it's CHEAP. Compared to other torque monsters... |
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Posted on: 2009/11/8 23:37
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Quote:
That is probably the best and most correct anwser. Who moves from Canada to Croatia?...... a crazy man Just kidding. Those people were Croatians but lived and worked in Canada. When they wnet to retirement they decidet to return to Croatia. I guess it's nostalgia. As for my english, thank you! I've learned english language through all my education and watching american movies, spending some time on internet also helped a lot. Also, I wouldn't be able to perform my job without it, as most of technical literature is in english. |
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Posted on: 2009/11/9 11:36
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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I did some calculating today and I'd like to hear your opinions.
I plan to deck the block to 9.000" (mill down .025"). I'll use Felpro gasket with 0.039" comp. thickness. According to my calculations that puts me to: * 10.8:1 SCR * 8.2 - 8.4 DCR (I'll do some work on chambers so I'm not 100% sure in final chamber cc) * 0.039" piston to head clearance I could go higher with CR because lowest octane fuel here is 95 and 100 is available almost anywhere. However, I'm limited with engine components that I've got. Parameters that I've used for calculations are below, so if anybody wants to doublecheck on me, please do. - stroke 3.48" - rod 5.7" - adv. intake closing 70 deg (this is with xr-288hr cam) - bore 4.020" - chamber cc 58-60 - gasket thickness 0.039" - gasket bore 4.080" - piston dish 5cc Any inputs and thoughts are welcome! |
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Posted on: 2009/11/21 14:19
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Aardwolf | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Might want to use a 6" or 6.125" rod if new rods are in the budget.
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Posted on: 2009/11/21 16:01
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Aboatguy | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Quote:
Good idea but too late he already has pistons |
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Posted on: 2009/11/22 17:53
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Update:
The torque plate that I had fabricated was finally done, so I took the block to the machinist. He will do next operations: - boring/honing 0.020" over - milling the decks to 9.000" deck height - installing new cam bearings - installing new freeze plugs - polishing the crankshaft - check the crank if it's in tolerances (I'll double check that myself) Here are a few pics: While the block will be at the machinist, I will do some work on the heads and intake. As you know, one of my heads had some serious damage, so I gathered a new one. Only difference is that this head is completelly stock. So now I have one fully ported head (by myself) and one stock. I've cleaned one of the ports just to take some pics for comparison. I will do some more porting on both heads, as there is still some room for improvement but I'll do that later, after I'll have seats for new 2.02/1.60 valves installed. |
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Posted on: 2009/12/5 19:51
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Finally I did some progress.
I was finished with rough porting so I took the heads to the machinist for new, larger valve seats to be installed. Here are pics before: While he installed new seats I also asked him to add some material on the lower side of intake ports. I had some problems with leaks here because gaskets didn't have to much material to seat on. On the pics below you can see how much is gained in intake and exhaust ports with new seats installed. Also, you can see where material was added for better gasket sealing. After removing extra material that was gained with larger seats, I went to work on chambers. Deshrouding valves is very important as new valves are significantly larger than stock and are much closer to chamber walls. First I roughly removed some material and then polished the chambers. Here are a few pics of work and the final result: Next, I have to take the heads back to machinist to have new guides installed and valve job done. |
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Posted on: 2010/2/20 10:39
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'90 L98 auto with a lot of mods |
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flyboy | Re: Engine rebuild/upgrade project | ||
Elite Guru
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What kind of guides are you going with? Liners or entire replacements?
When I was porting, the aluminum seemed harder, more brittle, at some of the exhaust valves. I wonder if cracking would be a concern when the old guides are driven out? Also, the guide bosses, being thinned out now are kind of delicate looking. |
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Posted on: 2010/2/20 13:54
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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I'm going with complete new bronze guides. Old ones are
going out without a problem, but head must be heated before pushing them out. I've done a lot of similar heads (guide bosses concerned) and if guides are probperly driven out/in with heads heated and lubricated new guides, I've never had a problem. |
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Posted on: 2010/2/20 14:00
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'90 L98 auto with a lot of mods |
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Here is one pic with old guides driven out and you can see that there are no cracks or damages on guide bosses.
They remained exactly the same as were with guides in. But HEATING the head is a MUST!! |
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Posted on: 2010/2/20 14:08
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'90 L98 auto with a lot of mods |
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flyboy | Re: Engine rebuild/upgrade project | ||
Elite Guru
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Thanks, you put my mind at ease. Yes, that is what the machine shop told me, but being the skeptic that I am, well....
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Posted on: 2010/2/20 14:14
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'91coupe, LT4Hotcam, some other stuff. If it's too loud, you're too old. "He works on old cars, then junks 'em" |
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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No problem! I know what it's like loosing a sleep over some details!
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Posted on: 2010/2/20 14:32
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'90 L98 auto with a lot of mods |
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corvetteronw | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Looks like you know what you are doing.
I work with several gals from Bosnia. They tell horrific stories of the war. All of their parents who now reside in the US are planning on returning to their homes to retire. They miss the country of their birth along with their traditions and food. I have seen pictures from the region and it looks like a beautiful country. |
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Posted on: 2010/3/2 16:01
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A VETERAN IS SOMEONE WHO AT ONE POINT WROTE A BLANK CHECK MADE PAYABLE TO THE UNITED STATES OF AMERICA FOR AN AMOUNT OF UP TO AND INCLUDING THEIR LIFE. |
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Yes, war was terrible (like any war). Some parts of Croatia were completely ruined and it was even worse in Bosnia.
And I understand them about the food. When you once try "chevapi" you'll allways come back for more. Chevapi |
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Posted on: 2010/3/3 10:44
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'90 L98 auto with a lot of mods |
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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That orange color was too much for me, so I cleaned it all
off and repainted it. So the block is bored/honed, zero decked, new cam bearings and freeze plugs are installed. Just one more final cleaning and it's ready for assembling. |
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Posted on: 2010/3/3 10:59
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Curtis1974 | Re: Engine rebuild/upgrade project | ||
Elite Guru
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Looks Great!
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Posted on: 2010/3/3 13:32
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_________________
Car's approximate birthday: June 29, 1974 Purchase date: 11/23/2003 Custom candy green - Vortec roller motor - TT2's - Custom sound system - Hooker side pipes - Babe magnet :thumbleft: |
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anesthes | Re: Engine rebuild/upgrade project | ||
Master Guru
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Quote:
Keep in mind, this ignorant American doesn't know where Croatia is.. Still sounds like a strange move.. Location? National language? Political system? National religion? -- Joe |
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Posted on: 2010/3/3 13:56
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Quote:
For anybody interested, here you go: Croatia is a part of ex Yugoslavia. It's located very close to Italy (boot shaped half-island) Croatia location Capital city : Zagreb National language is Croatian Croatian language Croatia is parlamentary republic. National religion is 90% Roman Catholic. And one more very important fact. There are maybe 10 C4 vettes in whole Croatia. |
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Posted on: 2010/3/3 14:15
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Here is a litte update with "a few" pics
crank balanced and polished new ARP main bolts crank in place and all mains measured with plastigauge all mains are cleaned of plastigauge and lubed checking crank end play rings file fitted and measured for correct gap new SCAT forged rods and Clevite rod bearings plastigauged all rod journals rods, pistons, rings assemblies rotating assembly done new (CC HR288) vs old (LPE 219) cams cam and timing set are in new LS lifters That's it for now! |
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Posted on: 2010/3/29 20:31
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'90 L98 auto with a lot of mods |
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pr0zac | Re: Engine rebuild/upgrade project | ||
Elite Guru
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nice!!1
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Posted on: 2010/3/29 20:41
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_________________
96 lt4. 357ci, 11:1, LE 226/232, LE2 LT4 heads, ported LT4 intake, EM Gladiator44, EM LT's, stock exhaust, NX kit. |
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Matatk | Re: Engine rebuild/upgrade project | ||
Webmaster
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Looks great! Did you have any clearance problems with the double roller timing chain? Did you do any other machining on the block such as oil return, etc?
Matthew |
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Posted on: 2010/3/29 23:40
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Thanks guys!
I didn't have any issues with timing set. It fits nice. I did some work on oil return holes. I removed sharp edges and smoothened them out with sandind drums. |
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Posted on: 2010/3/30 11:19
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'90 L98 auto with a lot of mods |
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TommyT-Bone | Re: Engine rebuild/upgrade project | ||
Chair-man of the bored
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Nice pics and detail. Threads like these help me tremendously in understanding "How it works". Thanks.
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Posted on: 2010/3/30 12:36
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flyboy | Re: Engine rebuild/upgrade project | ||
Elite Guru
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Very nice!
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Posted on: 2010/3/30 12:54
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_________________
'91coupe, LT4Hotcam, some other stuff. If it's too loud, you're too old. "He works on old cars, then junks 'em" |
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Update.............
I've finally found some time to finish the heads. New bronze valve guides are in and cut for .530" seals Valve spring seats are cut for larger springs and to exact height New seals, valves, springs, Ti retainers... |
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Posted on: 2010/5/12 18:53
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'90 L98 auto with a lot of mods |
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BrianCunningham | Re: Engine rebuild/upgrade project | ||
Senior Guru
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sharp looking
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Posted on: 2010/5/12 20:49
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Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com |
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flyboy | Re: Engine rebuild/upgrade project | ||
Elite Guru
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Have you decided on a head gasket?
Will the thickness and it's effect on compression have any influence on your choice? What about retorqueing after the engine has been run? Looking good. |
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Posted on: 2010/5/12 23:38
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Matatk | Re: Engine rebuild/upgrade project | ||
Webmaster
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Those look great for 113 heads!
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Posted on: 2010/5/12 23:59
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_________________
2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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rklessdriver | Re: Engine rebuild/upgrade project | ||
Senior Guru
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The cyl heads look nice for a home port job.
Did someone coach you on the port work? I noticed you kept the heavy grinding to the roof of the ports and valve bowl... Precisley what you should do. Most first timers grind the floor out of a port and screw it all it. What did your combustion chamber come out to? Be very careful to listen for loose valves and check the valve adjustment often if you run that engine hard. I noticed that yor new Comp Camshaft is ground on a Cast Iron core. They are known to be very failure prone. Will |
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Posted on: 2010/5/13 0:42
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1984 Corvette. 434 SBC with a Powerglide. Best pass - 8.48@160MPH 1.23 60ft on MT 275/60R15 Radials. 1972 Corvette. LS5 454 BBC with M20 4 speed. Best Pass - Doing good to just pass a gas station. |
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bogus | Re: Engine rebuild/upgrade project | ||
Grand Imperial Pooh-Bah
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Impressive, indeed! Well done!
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Posted on: 2010/5/13 2:17
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_________________
The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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Transfer |
sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Thanks guys!
Quote:
I'm using Felpro 1043 head gaskets. I have "zero decked" the block so with those gaskets I should be exactlly at 0.039" quench and with 8.4 - 8.5 DCR. I don't plan to retorque. I've used those gaskets before and didn't retorque them. Never had an issue with them. Quote:
Thanks Will! Actually, I've been doing cylinder head porting for more than 10 years now, but I mostly do european and japanese 4-valve heads. My chambers came out at 59 cc's. Thanks for the advice on the valves. I didn't know that cast cams have issues. If I knew earlier, I would've probably select a different cam. I don't have time or money to go with a new cam now. But I don't mind checking the valves few times a year. BTW, what is the most common problem with cast cams? Do they tend to break, or lobes wear out or.....??? |
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Posted on: 2010/5/13 10:23
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'90 L98 auto with a lot of mods |
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rklessdriver | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Quote:
IMO the cast cams are just not hard enough. I've seen a few cases where the roller lifter wheel being made from a harder tool steel just eats them up. [IMG]http://www.usfamily.net/web/hoffbug/camlobe1.jpg[/IMG] Will |
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Posted on: 2010/5/13 21:03
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1984 Corvette. 434 SBC with a Powerglide. Best pass - 8.48@160MPH 1.23 60ft on MT 275/60R15 Radials. 1972 Corvette. LS5 454 BBC with M20 4 speed. Best Pass - Doing good to just pass a gas station. |
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Thanks for the heads up Will! I'll be carefull!
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Posted on: 2010/5/14 11:54
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'90 L98 auto with a lot of mods |
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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Update......
I'm finished with intake manifold (superram) porting: ....................... |
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Posted on: 2010/5/31 9:56
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'90 L98 auto with a lot of mods |
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Matatk | Re: Engine rebuild/upgrade project | ||
Webmaster
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It looks like you opened that up quite a bit. Do you have before/after pictures?
Matthew |
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Posted on: 2010/5/31 11:47
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2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP |
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sliding | Re: Engine rebuild/upgrade project | ||
Senior Guru
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I try to take photos of everything, but I forgot to
take some of intake before porting. |
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Posted on: 2010/5/31 12:05
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'90 L98 auto with a lot of mods |
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flyboy | Re: Engine rebuild/upgrade project | ||
Elite Guru
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Lots of TLC. Nice.
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Posted on: 2010/5/31 12:45
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_________________
'91coupe, LT4Hotcam, some other stuff. If it's too loud, you're too old. "He works on old cars, then junks 'em" |
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