Well my Cam pin broke what kind should I get now??

cool40 wrote:i have never used anything on the threads in a cam bolt.not a bad idea i guess,but you may need it out someday too.

I know this because, well, you know bolt walked right out on me and F'ed it up before the HS drags since we just replaced the cam. I've heard of it happening to other people too. Just throwing it out there.

cool40 wrote:

Big block fox 339 wrote:

dfree383 wrote:Put the cam gear on the cam and see if the snout of the cam sticks out beyond the gear.

I just put it on and it looks fine snout is inset

A engine builder built the engine he said he used locktight

I just ordered a arp cam bolt,c460 cam,lifters,and timing set from lem when everything gets in im gonna check piston to valve clearance to make sure nothing touching

did you have the fuel pump drive bolted on the cam gear?if it was make sure the tab that goes in the pin hole is not hitting the pin and holding it off the gear when you bolt it down.i'v saw it before when the cam pin was a little too long.hope you figure it out,let us know what you find.

That's what happened to me, the tab was put in the pin hole. There didn't seem to be any other place for it to go.

You're right it go's in the pin hole but the pin cant be to long.

cool40 wrote:

Big block fox 339 wrote:

dfree383 wrote:Put the cam gear on the cam and see if the snout of the cam sticks out beyond the gear.

I just put it on and it looks fine snout is inset

A engine builder built the engine he said he used locktight

I just ordered a arp cam bolt,c460 cam,lifters,and timing set from lem when everything gets in im gonna check piston to valve clearance to make sure nothing touching

did you have the fuel pump drive bolted on the cam gear?if it was make sure the tab that goes in the pin hole is not hitting the pin and holding it off the gear when you bolt it down.i'v saw it before when the cam pin was a little too long.hope you figure it out,let us know what you find.

Thats possible il check that next time im at the shop

Looked over my short block today the intake valve reliefs has some slight markings in it is it possible I floated the valves I shift at 6000. I only over reved it once before I put a limiter in it. It was the first time I ever drove it I know it didn't get over 6700 rpm at the highest is it possible that it damaged the cam??

No they all seem straight just bent valves I'm using lunati 8.550 pushrods

Yeah I know about bent valves lol. I hope it won't happen again I'm starting over new and better

I hauled my cam bolt to 60ftlb and locktight. Single cam pin , Comp XR292R roller. This odd vibration developed a few runs later and snapped the fuel pump drive mandrel for the mechanical fuel injection in the middle of a run , and it coughed and died due to lack of fuel.

Further inspection showed chipped teath off the FMS roller timing chain in the sump on the drain magnet. OK , pulled the motor to have a look. Then I found the cam pin had sheared as well.

Looked and looked , then found the culprit. The cam washer , FMS fat good quality , had cupped and was not applying full clamp onto the timing gear face. Thus the gear moved around and this moving around was the sheared pin. Thank god the gear didnt move much and i did not suffer any valve damage. Drilled a new timing gear set and the old cam with twin pins fitted , bought an ARP Washer and bolt set . All fixed.

John

Ok the springs that were on my heads was for like over .700 lift so the were really week at my .565 lift so I'm pretty sure it was floating the valves not sure if that broke the pin

Is 6000 rpm to much on the hyd ft cam

The springs were weak for my cam they were made for a bigger lift cam