Valvetrain issues another setback!

[autoaddictions]

Damit i need to vent on you guys. I finally after 7 months get my truck running and it was making a tapping sound comming from the valve train. I thought it may have been the lash due to the fact im running magnum 875 push rods and RPM roller tip 1.6 rockers. I pull the valve covers off today and find the rockers are smashing into the top of the valve spring caps and wearing 2 groves into the retainers on every valve. The roler tips werent even touching the valve tip just the valve spring caps and retainers. I could spin the roller tips freely even with the valve full open( pushed down ). Ya know i bought all these parts from RPM and youd think they send you the right stuff after building like 50 or so of these trucks. id understand if i miss matched some of my own parts in there, But it all came from them. Heads,Cam,Lifters,rockers,push rods,valve covers even the studs and hardware. I ll post some pics of the damage done to the valve spring caps and retainers.
Im so tired of taking 2 steps back on ever project because of sombody elses screw up. Mike @ RPM has been very helpfull with this build and im sure hell make it right, by sending me the right parts, but the time and agravation is mine to deal with!! I was going to Dyno with Harry Anderson on monday!!! Not any more!!! Thanks for reading..

 

[TYTILIDIE]

Re: Valvetrain issues another setback!

Damn man that sucks.

 

[ed hess]

Re: Valvetrain issues another setback!

if i understand what your saying. You bought pushrods 1st without checking for proper length. so the pushrods are to short so the rocker hits the outer diameter of the retainer.

do you have a pushrod checking tool?

or do you need to clearance the rockers for the larger spring diameter?

when doing final assembly its not just a matter of puting all the pieces in there but looking hard at everything for those little things that now you see you missed.

fwiw I went thru a lot of metal to cleareance my jessels on 800psi springs in angle milled heads.

 

[ViciousV6]

Re: Valvetrain issues another setback!

We found alot of things wrong with my truck when assembling the last engine which is in it now and that set-up came from McCoy Motorsports. The valves seals were wrong, the valve springs were wrong and were breaking, the pushrods bosses were not clearances for pushrods. After that motor blew-up and i Had a locla machine shop/race engine builder set-up the motor he found all these issues that were in the old set-up that i drove for a year before it blew-up.

The checking lies in the hand of the assembly person to check and double check everythig is working with the proper tools. Maybe he sent you the wrong length push rod. Never ass-u-me everything is correct we all make mistakes. Unfortunately you already ran thetruck with it incorrect.

Hope you get it straightened out soon.

Ralph
ViciousV6

 

[autoaddictions]

Re: Valvetrain issues another setback!

Well the problem was the rockers were screwd up !! The push rods were fine I ordered some comp self aligning 1.6 rockers they look like there going to work fine. im installing them tommorow