All of my pushrod guideplates ahave a groove wore in them from the pushrods. It is pretty bad with only 600 miles on them. They are GM guideplates. I was getting some valve float around 6300rpms. Could the valve float cause the pushrods to wear through the plates like that?

Oh and i have comp chromemoly pushrods.

 

I guess your rockers are NSA?

 

Like Shoe asked are your rockers self aligning or not.
Ya can't run guideplates with self aligning rockers.

 

He has NSA Comp 1.6s.

They do look pretty chewed up. Pushrods seem to be straight though.

Oh, and stock bottom end pwns you.

 

What he said, they are Comp Pro Mag 1.6 nsa.

 

Something is out of whack.What head's ya got? Are the push rods in the guides straight with the lifter's and valve stem?

 

Stock heads, everything looked straight... Stock length pushrods. Comp R lifters. I have to pull the heads due to spinning a bearing and having to rebuild so i will look to see if everything is ok. I am thinking maybe the metal from the plates got in my bearing causing the failure...

 

That would be a good bet.Or it may have messed up the oil pump,which caused it.

 

Just throw in my .02, the CM guideplates have been on my car for almost 2 years without issue, so unless you have a bad set, they likely arent an issue themselves.

 

got any pics of the guideplates??? Heard that GM guideplates are the only way to go.... so i'm confused on why/how that happened....????? did you put them on yourself?????

 

http://memimage.cardomain.net/member...42_56_full.jpg
http://memimage.cardomain.net/member...42_57_full.jpg

The pictures suck but the all look like that..

 

Is it possible the guideplates aren't hardened?

Also, you usually can "adjust" the guideplate position so the push rods are centered in the guideplate slot.
In your case, I would center the rocker arm tip on the valve stem and adjust the guideplate so the push rod is centered in the guideplate slot.

I know this is not recommended; but, I ran Crower stainless steel self-aligning rockers on my AFR heads with AFR guideplates for 30K miles with no problems at all. However, I did carefully adjust each guideplate to make sure the push rods didn't contact them throughout their entire movement.
If you visit this page:
http://www.crower.com/cat/domestic/c...lvetrain.shtml
and look at the "features include" section it says:
"Self-aligning roller tip. Runs with or without guide plates."
I am not recommending anyone do it, but I did and got away with it.



Tom Piper