95 3.4 timing belt replacement, not to beat it to death

[BLstangin]

I read the top post and have a few questions, I'll be doing this at home on my own and am confident I can do it. But why do I have to loosen the cam pullies and what is the lock ring, also why after setting the belt up do I have to turn it one full rotation to do the front? And when do I tighten the pullies again. What keeps them from spinning, aparently the cam and gear aren't splined? I'm sure I'll have more questions once I get into it.

[Kohburn]

lock ring is 91-93 only

the cam cogs are held in place by friction only - they are infinately adjustable - you have to losen them so that you can set your timing after intalling the belt

[alloro]

Re: 95 3.4 timing belt replacement, not to beat it to death

why after setting the belt up do I have to turn it one full rotation to do the front?

One full turn of the engine is only 1/2 turn of the cams. By locking the front cams, then turning the engine one full turn before locking the back cams, results in the front and back cams being 180 degrees apart. This is what you want for the engine to run correctly.

[SappySE107]

RE: Re: 95 3.4 timing belt replacement, not to beat it to de

I wish they would have just machined the damn cam flats properly so you wouldn't need to do that, but GM is retarded sometimes:P

[RednBlack]

Re: RE: Re: 95 3.4 timing belt replacement, not to beat it t

GM is retarded sometimes:P

This, has GOT to be my new signature!

[napatiger]

lock ring is 91-93 only ???
I have a 95; I think that it has lock rings? Well what ever they are, they locked down by them self while I was rotating the engine and I popped out the cam lock down from the aluminum head....

So.... when you lock one side and the other is not locked; you should make sure that the ring is not even close to the damn cam because the cam sproket will still move with the belt and can cause the ring to work its way in and lock when your not looking.

I hope I don't have a piece of metal in my heads.....

[alloro]

Re: RE: Re: 95 3.4 timing belt replacement, not to beat it t

I wish they would have just machined the damn cam flats properly so you wouldn't need to do that

They did that starting in 94 (I think). So with 94 and later engines all 4 cam flats are up during the cam timing procedure and you don't have to do the one full rotation of the engine step.