timing set
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Teching In
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timing set I'm replacing all the seals for the timing cover. I want to replace the timing set while I have it apart. Not sure if I want to use the gmpp set or go with the cloyes c3039 . I read some where that they are the same.
You're right; the stock timing set isn't a roller chain.
The stock set is a durable piece for mild to medium setups; it just has a little slop in it, even when new.
Unless you see abnormal wear, here's what I'd do: Re-use the stock LT1 cam sprocket (the lowest wear item of the timing set), use a Cloyes C506 chain and a Cloyes S505 oversized crank sprocket to have a "tighter then factory" setup.
Or you can use a stock GM chain (probably the identical part as the Cloyes C506 since Cloyes made all the GM LTx timing sets) with the oversized crank sprocket.
Or......you can keep it simple and just stay all stock; nothing wrong with that either.
The stock set is a durable piece for mild to medium setups; it just has a little slop in it, even when new.
Unless you see abnormal wear, here's what I'd do: Re-use the stock LT1 cam sprocket (the lowest wear item of the timing set), use a Cloyes C506 chain and a Cloyes S505 oversized crank sprocket to have a "tighter then factory" setup.
Or you can use a stock GM chain (probably the identical part as the Cloyes C506 since Cloyes made all the GM LTx timing sets) with the oversized crank sprocket.
Or......you can keep it simple and just stay all stock; nothing wrong with that either.
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These aren't a belt on an import motor, the timing chain is not a maintenance item. Nothing wrong with replacing it but also no real reason to replace it. A whole LOT of us have done heads and cam on original chains, or like Pat said you could tighten it a tad with the oversize gear.
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Teching In
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And .... the ses light is on for the crank sensor tried a couple GM sensors and light keeps coming back when I start the car. So I want to rule out a stretched timing chain. And fix the oil leak because it is getting the plug for the sensor covered in oil. I cleaned it a few times thinking that might be the cause of the light but no luck. It did stay off breifly when I had the car warmed up and cleared the code and it stayed off for a few starts. but let it sit for about 30min. started and came back on.
OP if you're going to remove the timing cover to replace the seals (the seals can be replaced without removing the cover also) on your 133k mile engine then it is just good preventive maintenance to replace the timing chain and sprockets while you're in there. I think you will be surprised at the wear to the teeth of the crank sprocket. You can't go wrong with OEM GM parts.
But if you want a double roller just to say you have a double roller, that's Cloyes 3145.
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Teching In
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I'm also doing the gasket for the timing cover. I got the fel pro gasket kit so I can replace it all. Also got a new opti, new water pump, GM fuel pump, fuel filter, spark plugs, wires, and coil. It runs like a champ but I have to pull it apart again to fix the oil leak and try to figure out y the crank sensor keeps setting off the see light.
