Timing chain slack...
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Timing chain slack... This chain HAS to be worn out pretty bad. The car had an MS4 in it for a good while, i found this when I put my SSHT in the block this morning. Guess I need to order a new chain.
http://www.youtube.com/watch?v=3VoyDHZ-N-k
http://www.youtube.com/watch?v=3VoyDHZ-N-k
The chain in the 15K 6.0 I have just taken down,[Bone stock], has significant slack.. Similar to yours, maybe not as much. Enuf to warrant a new chain, tho.
I'm wondering if these engines need a mod to put more lube onto the chain, or if the chain quality goes along w/ the other "cheapo" items??
I'm wondering if these engines need a mod to put more lube onto the chain, or if the chain quality goes along w/ the other "cheapo" items??
You should at least pick up an LS2 chain from Scoggin Dickey as a replacement.
http://www.sdparts.com/product/12586...mingChain.aspx
Nicer chain than the stock LS1 and is very affordable. Depending on your needs SDPC also has chains for more demanding builds as well.
http://www.sdparts.com/product/12586...mingChain.aspx
Nicer chain than the stock LS1 and is very affordable. Depending on your needs SDPC also has chains for more demanding builds as well.
There is supposed to be a fair amount of slack due to the fact that aluminum expands quite a bit when it gets hot. It kind of sucks that the iron blocks are stuck using the same chain, but that's how GM did it.
And what is a SSHT?
And what is a SSHT?
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Installed a Cloyes LS2 chain just now, still sorta slack, but nothing like it was. It was probably a wise $30 bucks on my end. BTW, SSHT is the Street Sweeper High Torque grind from flowtech.
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For how cheap a new LS2 chain is I don't see why anyone wouldn't throw a new one on there while the cam is out. I reused the crank gear, put on a new modified (adjustable) GM cam gear with a new LS2 chain and I thought it had quite a bit of slack but not quite as much as your video shows.
Using the CTE of aluminum with a 200 deg F rise (being conservative) shows an expansion of about 0.0027" per inch of the block. I can't remember how far above the crank gear the cam sits but if it's 6" then there's 0.016" of growth total where the cam moves further away from the crank theoretically. This doesn't sound like much but it will take some slack out of the chain.
Using the CTE of aluminum with a 200 deg F rise (being conservative) shows an expansion of about 0.0027" per inch of the block. I can't remember how far above the crank gear the cam sits but if it's 6" then there's 0.016" of growth total where the cam moves further away from the crank theoretically. This doesn't sound like much but it will take some slack out of the chain.
Thread Starter
TECH Fanatic
iTrader: (6)
Joined: Aug 2006
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From: Charleston, S.C.
For how cheap a new LS2 chain is I don't see why anyone wouldn't throw a new one on there while the cam is out. I reused the crank gear, put on a new modified (adjustable) GM cam gear with a new LS2 chain and I thought it had quite a bit of slack but not quite as much as your video shows.
Using the CTE of aluminum with a 200 deg F rise (being conservative) shows an expansion of about 0.0027" per inch of the block. I can't remember how far above the crank gear the cam sits but if it's 6" then there's 0.016" of growth total where the cam moves further away from the crank theoretically. This doesn't sound like much but it will take some slack out of the chain.
Using the CTE of aluminum with a 200 deg F rise (being conservative) shows an expansion of about 0.0027" per inch of the block. I can't remember how far above the crank gear the cam sits but if it's 6" then there's 0.016" of growth total where the cam moves further away from the crank theoretically. This doesn't sound like much but it will take some slack out of the chain.
Thanks! One of the best answers I have gotten out of this place lately. Most guys would say "A big gosh dern cam el do that to ya".
