jhubbs

iTrader: (9)

I've got kind of a stupid question. How much slack is there supposed to be in the timing chain? I put a cam in today and after installing the cam, cam gear, and LS2 chain, the chain has a decent amount of slack in it. I can push the chain in between 1/2" and 1". It's not loose enough to skip teeth on the gears, but if I turn the engine over by hand pretty fast I can hear it slapping around. I made extra sure the dots were aligned. So my question is how loose should the chain be?

vsocks1

iTrader: (6)

That seems way to loose to me. Did you buy just the chain and not both sprockets?

red02Hawk

iTrader: (9)

i have i similar problem but mine only moves 1/2" at its widest movement and I'm using a Jwis chain by Katech, but my block has been line honed. So I'll ask the question too, how loose should the chain be?

jhubbs

iTrader: (9)

I bought both sprockets, but I only changed the cam gear. I didn't feel like pulling the crank sprocket off and pressing the new one on, especially when my engine has less than 20k miles. I doubt that is what is causing my problem, but I could be wrong.

vsocks1

iTrader: (6)

Take a look at this timing set if you want a better fit and chain!

http://www.lingenfelter.com/Merchant...Category_Code=

Sid447

Shouldn't be any need to change either sprocket if it's gone through normal wear and tear in the 20,000.
They are pretty slack.
You can always buy the GMPP chain dampner
PN 88958607 (this may not be the current PN)

It's described in a GMPP catalogue as:-

88958607 Timing Chain Dampner LS1, LS6

This timing chain dampner is intended for high engine speed applications and is used to improve timing chain life. Some blocks require drilling and tapping -an instruction sheet is included.

red02Hawk

iTrader: (9)

^ummmm, does anyone even still have any of those lying around?

Old SStroker

Did you buy GM parts from a dealer or were they aftermarket parts? In either case they are meant to be installed as a set. The sprockets and chain are designed to give a certain crank-cam distance. Mixing and matching isn't a real good idea. You may be setting yourself up for more serious problems if you run the mix & matched stuff.

FWIW, the sprockets do wear to fit the chain that was installed originally on them. You should replace all three items as a set.

Sid447

They come as stock fitting on Gen 4's

jhubbs

iTrader: (9)

I bought the set from Yank a while back when they had a special going. I'll probably put the new crank sprocket on in a few days and see if that changes things.

Here's some pictures of what I'm talking about. The right side of the chain is tight, but the left side has about 1/2" of slack in it.

01ssreda4

iTrader: (96)

i dont remember my LS2 set from yank having hardly any slack in it. if it did it surely woulda raised a red flag.

Sid447

You've got to have a bit of play in the chain,

or else it's going to build more heat between the chain rollers and sprocket interface, absorb more power doing that and it'll stretch & wear the chain out faster.

7deuce-ss

iTrader: (3)

hehe what the heck..... i bought mine from yank and it has the almost the same slack.. now and trying to rig up a damper for it...

Ryans99ls1

iTrader: (16)

hmm maybe i never really paid attention when i did my swap, but that doesnt seem to bad to me.. i mean its not going to be so tight that it wont even move, like said above it needs some slack otherwise when you romp on it, it might snap

muayyadf1

normal slack, JWIS has very minimal slack. Nice piece