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| NC Kid | Timing Chain ? | ||
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Elite Guru
 
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Do timing chains wear out? Do new ones add any benefit? Is there a pully near the cover for the chain and if it is misalighned or wearing out, it could rub a hole in the chains casing/cover causing the oil to leak out and lock your motor up?
 Vauge description I know but that is the best I can describe what I am trying to ask....Just pondering that right now.Thanks... |
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Posted on: 2008/1/29 15:31
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| NC Kid | RE:Timing Chain ? | ||
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Elite Guru
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While I am on it, what does the timing chain do? Is there anything else in there that can wear out? I heard Cloydes double roller timing chain was good. What is so special about those?
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Posted on: 2008/1/29 15:33
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| 94z07 | RE:Timing Chain ? | ||
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The timing chain keeps the crankshaft indexed to the camshaft so that the valves open and close in time with the pistons' travel.
Timing sets consist of a crankshaft gear, a camshaft gear that's twice as big, and a chain that connects them. Timing sets do wear out and they do fail and when they do they can cause enough damage that a rebuild is needed. The chains are strong but the rollers develop flat spots. The gears' teeth become scalloped and can break. Also, GM made several engines with timing gears that were steel coated with some plastic that was supposed to reduce the noise from the timing set. That plastic stuff can break off and collect in the bottom of the timing cover. On interference engines, engines where the pistons' travel and the valves' travel overlap, a broken timing set can cause contact between the top of the piston and the bottom of the valve. That contact can break things and send metal shards that cause additional damage. I had an Olds that failed when the camshaft gear broke off of the camshaft. I had a Jeep that didn't quite fail but ran rough until I replaced the timing set's plastic coated gears and tensioner. |
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Posted on: 2008/1/29 15:50
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| CFI-EFI | Re: Timing Chain ? | ||
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Senior Guru
 
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The timing chain drives the camshaft. That is it. The chain can stretch over tome and the sprockets an wear. A new timing set replaces worn sprockets and a stretched chain, for more accurate valve and ignition (on Gen I engines) timing.
Quote: Is there a pully near the cover for the chain and if it is misalighned or wearing out, it could rub a hole in the chains casing/cover causing the oil to leak out and lock your motor up? RACE ON!!! |
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Posted on: 2008/1/29 15:53
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| CentralCoaster | RE:Timing Chain ? | ||
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A timing chain is something that you don't wait until it breaks to change it out, unless you want to rebuild the whole motor.
I changed mine at only 70K because I happened to be doing the waterpump and it was accessible. Mine had the cheap pot-metal (or aluminum?) cam sprocket with nylon teeth. Some of the teeth were cracked and a few more broke off when I dropped it on the ground. I put a steel gear in there. |
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Posted on: 2008/1/29 16:03
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| NC Kid | RE:Timing Chain ? | ||
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So what are the signs that it is breaking?
Second, if you replaced your timing chain but it was installed incorrectly in some way, would it not destroy itself on start up or would it take awhile to break? How much does a good one cost? |
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Posted on: 2008/1/29 16:10
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| NC Kid | RE:Timing Chain ? | ||
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Quote:
A timing chain is something that you don't wait until it breaks to change it out, unless you want to rebuild the whole motor. If the teeth were cracked, how was your car still going without noticing something was wrong? |
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Posted on: 2008/1/29 16:12
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| CFI-EFI | RE:Timing Chain ? | ||
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Quote:
So what are the signs that it is breaking? RACE ON!!! |
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Posted on: 2008/1/29 16:18
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| smooth | RE:Timing Chain ? | ||
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Quote:
Quote: We can always count on you to bust somebody's chops huh CFI? whip :tongue5: Even though CFI was doin' that, He was right. Auto 101 is probably a good idea. Take a look at BoxWrench.net Its an engine building site for the (mostly)novice to the expert and might help you understand things a little more. Its a forum setup like this site, They are trying to sell a "how to" companion book. I guess thats how they support the site. |
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Posted on: 2008/1/29 16:40
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Alan 2001 Navy Blue Metallic Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind. Dr.Seuss |
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| CFI-EFI | RE:Timing Chain ? | ||
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Senior Guru
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Quote:
We can always count on you to bust somebody's chops huh CFI? whip :tongue5:  RACE ON!!! |
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Posted on: 2008/1/29 16:57
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| CentralCoaster | RE:Timing Chain ? | ||
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Senior Guru
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A standard oem replacement timing set can be had for $30. They've been the same for an eternity.
You can also upgrade to a double roller set for more, but only you can decide if your budget warrants it. The regular set will work just fine. If you're not sure on installing it, then don't! Or at least get the help of someone who knows what they're doing. At least you're not afraid to ask questions. No teeth broke on mine, just cracked. I had no idea until I pulled it out. I've seen other sprockets that were worse. The plastic material may be better for wear and noise, but it doesn't seem to endure the exposure to heat and solvents in the oil without getting brittle. |
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Posted on: 2008/1/29 17:26
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| NC Kid | RE:Timing Chain ? | ||
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Quote:
Quote: Im used to his comments so it doesn't bother me.  |
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Posted on: 2008/1/29 17:34
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| CFI-EFI | RE:Timing Chain ? | ||
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Quote:
Im used to his comments so it doesn't bother me. The "Automotives 101" was an honest and timely suggestion, also. The timing components (chain and sprockets) give no warning before failure. That can just break. It is a rare occurrence, but it happens. Unless you have X-ray vision, there is no way to check for cracked or broken teeth, short of doing all the labor involved in the replacement of the parts. At somewhere around 150,000 miles I checked my timing set for slop. It had about 12° of free play. I decided that was enough and went ahead and changed it. All of the plastic cam sprocket teeth were in good shape and showed no signs of impending failure. It was simply a matter of a stretched timing chain. RACE ON!!! |
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Posted on: 2008/1/30 0:43
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| smooth | RE:Timing Chain ? | ||
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Quote:
[quote]We can always count on you to bust somebody's chops huh CFI? whip :tongue5: Relax man, I was just effin' with you.  |
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Posted on: 2008/1/31 3:51
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Alan 2001 Navy Blue Metallic Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind. Dr.Seuss |
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| cuisinartvette | RE:Timing Chain ? | ||
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Posted on: 2008/1/31 4:51
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| fnsblum | RE:Timing Chain ? | ||
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Guru Newb
 
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Ditto CFI. Changing the timing chain is not a novice job. Later! Frank
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Posted on: 2008/1/31 5:34
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| MK 82 | RE:Timing Chain ? | ||
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Senior Guru
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Quote:
Ditto CFI. Changing the timing chain is not a novice job. Later! Frank Are you two neighbors? |
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Posted on: 2008/1/31 19:38
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| CFI-EFI | RE:Timing Chain ? | ||
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Senior Guru
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Quote:
RACE ON!!! |
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Posted on: 2008/1/31 23:56
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| Josh | RE:Timing Chain ? | ||
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Guru
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Where are you in NC black86vette?
I'm in Raleigh. I'll help you do the timing chain if you want. Taking a basic auto class is a good idea. I learned a lot in the first 2 years. Much more than I did from then on out. The learning curve is pretty steep at first, but once you get the basics you can start to theorize on the rest of the stuff as it comes along. |
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Posted on: 2008/2/1 4:43
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| NC Kid | RE:Timing Chain ? | ||
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Elite Guru
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Bout 5 minutes from Kannapolis....
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Posted on: 2008/2/1 18:05
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| Josh | RE:Timing Chain ? | ||
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That's not too bad I guess. About 150 miles down 85.
Let me know if you want to do it and I'll try to schedule a time to come down. I guess you could come here and we could do it my garage, but I'd hate for something to happen and we get stuck for a few days waiting on parts or something. Why do you think you need to replace the timing chain? |
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Posted on: 2008/2/1 18:18
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| NC Kid | RE:Timing Chain ? | ||
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Elite Guru
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Because everything breaks and it's annoying. I wanted to do led taillights BUT i need to replace my window motor because the ribbon broke. When I first got the car bearing rod got damaged. My tranny had to be rebuilt, my radiator went out, water pump, windshield wiper springs got damaged(weird), digidash, gas gauge, speedometer, caliper, rim, exaust needed to be replaced so I just upgraded
 , Distributor, tires, sound system looked like crap cuz of aftermarket, my windshield got smashed in because someone dont like me, serpentine belt wore out, battery and alternator went out, coil, plug wires, plugs fuel pump, ......Either thei njectors, differental, timnig chain,one of them is about to go out and cause all hell to break loose.....I can feel it!! , 30 dollars is cheap. Oh yea, brake booster and master cylinder went out as well, heats not working, A.C. has a leak, intake manifold gasket was bad, windshield wiper motor,.....I know its old but damn....Need I go any further??? Lately its been parked in my yard sitting....... I think the heater core is clogged, digidash has a bad solder, speedometer piece in the tranny is shot,. I don't want to be a pest and bother you with a timing chain. Gas is REALLY expensive.  |
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Posted on: 2008/2/1 19:27
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