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| bogus | Remember my non-numbers matching motor?? | ||
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Grand Imperial Pooh-Bah
 
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Well... a little research goes a long way...
The numbers have moved. No longer are they on the RF head pad, they are now down by the oil filter. And no, they are not easy to find! But, once found, confirms that my engine is the original to the car. A few observations: 1. The 1996 engine is a ton smoother, I suspect that GM simply got better at assembly over time. 2. The 1996 is also a chunk more energetic. I suspect my old motor, with 185k miles on it, was about dead to the world. Meaning, losing compression... things just not right; cause it made all sorts of funny noises that the new engine doesn't make. That's it! |
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Posted on: 2013/2/2 13:56
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| Durango_Boy | Re: Remember my non-numbers matching motor?? | ||
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Elite Guru
 
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I personally felt that 1996 was a turning point and GM was hitting it's stride with their roller motors. I believe that was when they started manufacturing the Vortec family of SBC engines and I feel they were a step forward in how there were engineered.
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Posted on: 2013/2/2 14:01
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| Ultraman | Re: Remember my non-numbers matching motor?? | ||
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2015 Memorial Day Car Show Winner!
 
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So what will you do with your old numbers matching engine? Rebuild it and put it back in...?
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Posted on: 2013/2/2 14:37
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2010 Grand Sport Coupe Gone but not forgotten... Vote DeSantis in 2024.... Make the IRS go away... |
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| rklessdriver | Re: Remember my non-numbers matching motor?? | ||
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Senior Guru
 
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By 96 GM had the new PM Rods and Lighter Hyper pistons figured out 100% with the LTX and L31's...
I honestly believe most of the LTX balancing problems were due to them changing in the middle of LTX production from the old forged rods to the PM rods... BUT the LTX's unkeyed hub and pulley/balancer combination on the front was a totally new concept on a SBC and didn't help either. No doubt a 180K mile engine is no match for a low mileage one in the power dept. I'm really glad you got your car back running and this engine you've had sitting for so long is still good as new. Will |
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Posted on: 2013/2/3 2:28
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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: Remember my non-numbers matching motor?? | ||
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Grand Imperial Pooh-Bah
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Quote:
383 |
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Posted on: 2013/2/3 20:07
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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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| bogus | Re: Remember my non-numbers matching motor?? | ||
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Grand Imperial Pooh-Bah
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Quote:
Will - I did care care of the new engine... it was taped up, so nothing could get in - throttle body, exhaust ports, hose bosses. I had plugs in, but only finger tight, cause about once every 8-10 months, I would squirt some 5-30 mobil 1 into the cylinders and give it a 1/4 turn of the crank. I hoped this would keep the rings from dinging up the cylinder walls. and wouldn't turn it so far as to damage the bearings. When I unpickled it, I pour oil over the cam and lifters, over both valves and over the mains. Before trying to start it, I cranked it with no fuel or ignition and ran it for 10 to 15 seconds, per try, over 2 or 3 crankings. When it did start, I didn't gas it above 2000 rpm until it was a bit warm. I hope I took enough precautions. |
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Posted on: 2013/2/3 20:11
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| j3studio | Re: Remember my non-numbers matching motor?? | ||
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Elite Guru
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Quote: bogus wrote: I think you'll be good. It always amazes me how much precision is just casually assumed with internal combustion engines. |
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Posted on: 2013/2/3 20:36
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| bogus | Re: Remember my non-numbers matching motor?? | ||
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Grand Imperial Pooh-Bah
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oh... dude... there is precision... that's the problem.
The amount of oil the mains ride on is so thin, a human hair is thick. |
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Posted on: 2013/2/4 1:31
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| BrianCunningham | Re: Remember my non-numbers matching motor?? | ||
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Senior Guru
 
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They changed how they balanced them
Dynamic run then balance. So if you need to remove the balancer, mark it, since they are NOT keyed. Glad your happy |
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Posted on: 2013/2/4 17:05
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| bogus | Re: Remember my non-numbers matching motor?? | ||
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Grand Imperial Pooh-Bah
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Brian - marking the front balancer is insanely important. It is required on all LT1/4 motors (can't speak of the LT5, I really wish it had a different letter designation, L32, for being a 32 valve engine, cause it shared zero with the LT1/4 engine).
You mark the arrow on the hub to the balancer. Remove the balancer and then mark the hub to the timing cover. Make sure you don't clean them off!!! Clean first, especially the area where you want to mark - grime builds up down there big time. Use a good paint pen designed for this; they are available at most auto parts stores. |
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Posted on: 2013/2/4 18:25
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| Aboatguy | Re: Remember my non-numbers matching motor?? | ||
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Senior Guru
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Seems to me that the stock balancer only fit on the hub one way due to the layout of the hub arms. Since I didn't want any issues at 7,000+ rpm I ditched the stock balancer I went with a keyed ATI damper. The Brian Ebert balanced rotating assembly doesnt hurt longevity either. Mike |
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Posted on: 2013/2/8 0:19
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| BillH | Re: Remember my non-numbers matching motor?? | ||
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The Stig Moderator
 
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Quote:
That's correct. You don't mark the hub to the balancer, you mark the hub to the crankshaft. |
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Posted on: 2013/2/8 0:44
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| bogus | Re: Remember my non-numbers matching motor?? | ||
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Grand Imperial Pooh-Bah
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sorry... you can mount the balancer on the hub anywhere... Unless the bolts are different, I was able to spin the balancer all the way around the hub.
I mark both, it's easier to see in the dark!! |
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Posted on: 2013/2/8 2:27
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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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| BillH | Re: Remember my non-numbers matching motor?? | ||
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The Stig Moderator
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Quote:
Must be a different design on thet motor cause the 92 only goes on one way. And there's no mention on marking the balancer in the FSM, just the hub location. |
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Posted on: 2013/2/8 3:30
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| BrianCunningham | Re: Remember my non-numbers matching motor?? | ||
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Senior Guru
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He's talking about the clocking of the mount, not the actual balancer
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Posted on: 2013/2/8 12:47
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| Aboatguy | Re: Remember my non-numbers matching motor?? | ||
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Senior Guru
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Quote:
Doesn't seem like he's just talking about the hub on the crank... Quote:
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Posted on: 2013/2/10 3:28
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| BrianCunningham | Re: Remember my non-numbers matching motor?? | ||
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Senior Guru
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Only fits on the 3 bolt locations
the only thing that can actually spin around is the mount. Attach file:  balancer_hub.jpg (0.00 KB) |
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Posted on: 2013/2/10 16:37
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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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| bogus | Re: Remember my non-numbers matching motor?? | ||
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Grand Imperial Pooh-Bah
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duh, Brian... but at the same time, if you mis-align the balancer and put it on wrong, you will be vibrating all over the place... this is why I mark the balance to the hub.
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Posted on: 2013/2/12 3:41
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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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| rklessdriver | Re: Remember my non-numbers matching motor?? | ||
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Senior Guru
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Quote:
No need to do that... other than it makes it easier to get it on correctly. The 3 holes in both objects are not equally spaced.... The balancer/pulley will only bolt up to the hub one way. Will |
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Posted on: 2013/2/12 13:21
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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: Remember my non-numbers matching motor?? | ||
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Grand Imperial Pooh-Bah
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That was my question several posts back...was the bolt pattern different.
Thank's for verifying that. |
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Posted on: 2013/2/12 16:11
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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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| BillH | Re: Remember my non-numbers matching motor?? | ||
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The Stig Moderator
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Yea post 11 & 12
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Posted on: 2013/2/12 16:18
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| Aboatguy | Re: Remember my non-numbers matching motor?? | ||
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Senior Guru
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Whew.... that's the problem with a written communication. The feedback loop often remains unclear.
Mike |
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Posted on: 2013/2/13 4:54
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