keeps bending push rods!!

[jwaller]

Re: keeps bending push rods!!

the 850's will not work(in the long haul). I have broken several and so have several other members. I believe thats what comp recommends but they are only stock replacements, not a performance lifter. if you have the 850's get them out before you have more problems. I had them(850's) explode as did other members here. at a min you need the 875's

 

[cloneman315]

Re: keeps bending push rods!!

what is the difference john .i hope i dont have them in my new motor what should i do if they are in tere

 

[BoostedSUV]

Re: keeps bending push rods!!

#1, #2, #6 intake keep "loosening" up..... Same ones that bent the pushrods before the heads were machined! It's not possible to have 3 bad brand new lifters is it?? Maybe pulling out the pressed in rocker studs?

 

[jwaller]

Re: keeps bending push rods!!

you might be pulling out the studs, I would definatly check for that, another reason I always convert to screw in's.

The main differance in the rockers is the capture device used to secure the cup that the pushrods sits in. 875's use a normal split ring type clip and the 850's use the stock style retainer. it's that piece that comes out allowing the lifter to shoot it's guts into the motor.

 

[jwaller]

Re: keeps bending push rods!!

http://www.syty.net/forums/showthread.php?t=28837

check that thread esp the post from sytyguy about the differances in lifters.

 

[V6 Kompressor]

Re: keeps bending push rods!!

Here is a link to help you with some technical help on valve train issues and other items of interest from Lunati/Holley: http://www.holley.com/TechService/Library.asp

 

[BoostedSUV]

Re: keeps bending push rods!!

I fixed this problem a while a ago.. the head studs were pulling out of the head and creating a lot of valve lash. I tapped the heads and installed screw in rocker studs... problem solved!

 

[HotRodV6]

Re: keeps bending push rods!!

I was thinking that was your problem. Glad you got it fixed with no more carnage.