benn

the original timing chain on my '92 roadmaster is stretched (L05 tbi) i decided to do a cheap upgrade and go with a double roller set and also decided to get a cheap stock lt1 cam to swap while im in there. problem is, the double roller timing chain set i ordered through summit doesnt line up with the bolt holes on my lt1 cam shaft. this is the timing set i bought Mel 3-163S i thought any gen 1 timing set would work... any ideas? I've read the stickys here and couldnt find anyone else with this problem. cam is from a '96 bbody.

heres the set that is supposedly a direct replacement for my car KT3-499SA3

Here's what we're dealing with

Fast355

iTrader: (2)

ALL GM factory roller cam small block applications use the smaller bolt pattern. I would get a single roller timing chain for a 1998 5.7 C3500 pickup. Much better than the non roller chains.

benn

thanks man, problem solved. the chain set i ordered was for a factory flat tappet motor

Schurkey

Yup, all the step-nose cams (retained with a plate bolted to the front of the block) had to have a revised (smaller) bolt circle because of the step-machining of the front of the camshaft.

This applies to the big-blocks, too. Learned that the hard way; not only did I need a different timing set, I also needed to order a different tang to drive the water pump on my marine water pump.

RBob

iTrader: (1)

Don't forget to shorten the alignment pin on the cam. Otherwise it will strike the front timing cover, cause untold false knock and then cut a circle out of the cover..

RBob.

Fast355

iTrader: (2)

I had a set of properly torque cam bolts back out once and do the same thing. I have used medium strength locktite on cam bolts ever since.