Camshaft / Cog slipping

[napatiger]

I don't understand why this happens to me.

I finally got everything running. Started her up and then the front bank intake cam has gone off timing. WTF, I know I torqued that bitch down enough. I suspect that I need a new camshaft. I already replaced the lock ring and bolt. It is not jumping the belt, just shifting on the cog, maybe I will try locktight

Anybody see this before?

HELP, I may go postal on my car.

[napatiger]

I think that the camshaft or cog needs to be replaced or maybe a light sanding?

[SappySE107]

Do not use lock tight! You will be in a world of hurt down the road if you do. I have never had a lock ring slip so its odd that you are having one do so with the lock ring in place. I use a wire wheel to clean up the lock ring, and a wire brush to clean up the cam gear where the lock ring fits in place. If its slipping, id get a new cam gear and lock ring from GM if possible, or a junk yard.

[series8217]

The lock rings do wear out. Mine did the last time I did the timing before switching to the tapered cone setup. The camshaft could certainly wear out too. Find the taper setup..
What torque specs are you using?
Did you properly apply tension to the tensioner? If not the timing will be out once you turn over the motor. You also have to turn it over a few times with the cogs free to seat the belt.

[SappySE107]

He has the taper setup.

[napatiger]

shold I just remove the whole cam carrier or just the intake cam (it is the front one) I will investigate the problem.

[SappySE107]

You wont get the cam out without pulling the carrier first.

[napatiger]

The investigation continues....

Pulled the T-belt, I notice that the rear bank cam/cog can move more freely than the front (Does not move at all).

Is that a function of what part of the rotation are? Example is that if you manually rotate one cam, it will 'snap' into place when cam lobe goes over the lifters. Rear has rotational movement (I think is good) and front just feel like the damn cam carrier is locked up and hard to rotate.

That would explain why the cog is slipping in relation to the camshaft on the front bank. Camshaft too hard to move (doesn't move) and the cog keeps moving from the timing belt.

I will pull the carrier tonight.

What should I look for?

[napatiger]

Pulled the Front Cam Carrier.

The camshaft will not spin without significant force.

Must have assembled it wrong.
Does ANYBODY use the torque-angle meter like the book says to do?

[SappySE107]

I certainly dont:P I just make it tight till the belt wants to move.

[napatiger]

I need to inspect the camshaft nose.....

F-in thing does not spin worth a shit.

If I need to replace the camshafts, I want you all to come up with some regrind numbers for me.
I know nothing has been proven for this motor yet, but you all know a shit load more about this than I do.

I did a search and found lots of ideas....

To Be Continued.

[series8217]

I need to inspect the camshaft nose.....

F-in thing does not spin worth a shit.

If I need to replace the camshafts, I want you all to come up with some regrind numbers for me.
I know nothing has been proven for this motor yet, but you all know a shit load more about this than I do.

I did a search and found lots of ideas....

To Be Continued.

Inspect the camshaft thrust plate. I had a fractured and bent one that was holding the cams in place, they would not turn no matter how much force was applied. One cam was broken too on the flange where the thrust plate is.

[napatiger]

Took out the cams...

Ohhhh noooooooooo.

significant gouges on the camshaft bearing surface as well as the carrier, but on just one bearing

Time to check pistons and the entire crank.

WTB: 95 Cam Carrier and Camshaft, no need for the cogs or lock rings.

All I can say is

[series8217]

Ouch.
Somebody didn't do a good job of cleaning your motor when they built it!