Well i pulled everything apart today to change my lifters cause i have a ticking issue. So i as i am pulling everything apart im notice all my pushrods have wear marks on them by the guideplates, and one is pretty decent to where you can feel it and has little dimples on it. Im using gmpp guideplates like everyone else has so why are mine wearing my pushrods out? The pushrods i have are the $40 comp cams ones. I need to buy shorter ones so im gonna get the magnum ones but i dont wanna spend all this money on new ones if my guideplates are gonna screw them up. Anything i can check or maby file out that one part on the guideplate?? But then ill get excessive movement then wont i? Anyone give any tips on what to do or check for? I have beehive springs, NSA promag rockers on 7/16 studs, gmpp guideplates. thanks

 

Are you sure they are hardened?

 

Go with chromoly pushrods, and if you file the guideplates you will take the surface hardening off of them and they will wear right out on you.

 

heres my pushrods. what are they??

http://store.summitracing.com/partde...6&autoview=sku

So im gonna get these, i was told they are the same as the magnums but a bit cheaper.

http://store.summitracing.com/partde...0&autoview=sku

 

Drag the sharp edge of a file across one of the pushrods, if it feels like it is cutting then they are no hardened or not properly hardened. The file should glide over the surface without the slightest blemish.

Comp or Manley chromeoly rods are what you need.

 

and i just measured for the size and it lokos like it could go eaither 7.150 or 7.100. Both looked real close.

 

Yeah, better pushrods are in order. I guess your just not one of the lucky ones who can have those pushrods work for you

Bret

 

Well if the guideplates aren't wearing they are harder than the pushrods, which ARE wearing.

With the GM847 or any cam for that matter with any amount of valvespring over stock you need to run a quality pushrod to prevent things like this. Springs and pushrods are not glamourus but they do make or BREAK a motor.

Bret

 

i know what your saying, thats the same thing in my line of work but i thought the pushrods i had were pretty good... guess not. My speed shop has the comp cams magnums in stock so im gonna go get thoes in the 7.150. So after that everything will be new so i should have no problems.

 

I still feel lucky. I have some Comp R lifters that are still completely in tact that were run hard for over 4000 miles for sale if you're interested.
If you'd do your research you would see that I didn't say anything about using hardened pushrods for anything over the profile of a 211/hotcam/305.
Is it the new fad to accurately diagnose a problem with just a few words of info?
Fascinating...

 

SS RRR, who are you talking to? It doesnt make any sence. But eaither way i just got back and i got 7.150 magnums so i should be fine now. Theres no reason the magnums should wear like the cheap ones did right?

 

I'm typing to a fart in the wind.
Bret doesn't believe the cheap hardened pushrods I bought from LPE work even though I had them in my LPE top end setup for over 70K miles and they did fine without a trace of wear. Now it seems he's trying to recklessly use what I said against me no matter the application the pushrods are being used for even though I've specifically stated hardened should only be used for mild spring/cam combos. Huge thread about it not too long ago. No worries.
Yes those pushrods should do fine barring the quality of the pushrods were to blame from the original problem.

 

As Paul Harvey says. here's the rest of the story.....

http://web.camaross.com/forums/showthread.php?t=501667

I will ALWAYS say that a better pushrod will always increase the performance of ANY ANY ANY cam. Even a stock cam. You can get buy with junk and just lose performance, whatever you want to do.

Bret

 

well i got everything back toghter with all new stuff. i.e. lifters and new PRs. Still making a knocking noise. Its comming from the right side #2 exhaust rocker. Its making a knocking noise. And i noticed that theres no oil comming out of that PRs to lube the rocker. I had the car idleing with no valve covers on it and all the others are getting oil but that one, and i had the car idleing for at least 5 min so it was warmed up. So i poured a cap full of oil on but it still knocks. WTF is goin on here. Need to get this **** fixed so i can finally make some test passes but im not with a rocker that knocks.

 

Yeah, the Magnums should suit you fine. I chose to go with Manton PR this go around - very nice pieces, made for you here in the good 'ole USA, and the Manton family are good folks to deal with.