New timing chain deflection.

[uscgmatt]

Quick question. How much deflection should a new timing chain have? It also has new sprockets. Mine has 1/16 max and thats really pushing on it. Is this normal?

Thanks

 

[QuickSilver]

0.500 for a new chain.

 

[jdemaris]

Quick question. How much deflection should a new timing chain have? It also has new sprockets. Mine has 1/16 max and thats really pushing on it. Is this normal?

Thanks

1/2" of side-slop for a new chain with new gears. and . . GM allows up to 8/10" of side-slop for used. I just checked one of mine with 220,000 miles and the original chain has 9/16" side-slop. That doesn't even amount to 1/2 of a degree of movement at the flywheel, i.e. no problem.

How in heck did you get a new chain and gears with only 1/16" of side-slop? Seems that's almost impossible. Or are you measuring rotational movement? Chain is supposed to be checked inbetween the gears on the lax side, for "in an out" movement. .5" to .8" is the range.

 

[uscgmatt]

I must have the wrong timing set. I got it from napa and the number shows it for the 6.2, but we all know napa. I am measuring deflection like the arrows in the pic. Thanks for the help. I guess I will put the old one back on as it is bout 1/2 in movement.

 

[CPAPPY]

Just put one on from napa also no deflection also maybe a .060 max . I will leave it on .

 

[uscgmatt]

Just put one on from napa also no deflection also maybe a .060 max . I will leave it on .

I will leave it on then. Have you started your engine since the replacement?

 

[mobileauto2000]

I have had to tear into an rebuilt engine with only a few miles on it. you would be surprised how fast timing chains loosen up. If you did not have to pry it onto the cam just run it.

 

[CPAPPY]

I will leave it on then. Have you started your engine since the replacement?

No I have not . Set back, heads are cracked . I do no the chain will stretch pretty quick.