My friend purchase a 85 camaro with a rebuilt eng.. It had a blown head gasket, and when we pulled off the valve covers, I noticed that the rocker arms where hitting the valve covers...

The block is 1985 5.7L(350) bored .040... Heads are from a 5.0L(305)unknown year... Stock RR... Cam is unknown, but has lopey idle @800 rpm.....

What causes this???? High lift cam??


TIA 93Z Will

 

I assume you mean that the pushrod side of the rocker arm is hitting the underside of the valve cover. If that's the case you've got pushrods that are too long.

'Fer instance: if it's a roller cam in the motor but they use flat tappet cam length pushrods this can happen (plus play havoc with rocker arm geometry).

Also, if you have big fat aluminum roller rocker arms they will hit the valve cover long before a stock stamped rocker will.

You're not going to screw this Frankenstein back together with fresh head gaskets are you?

 

Yes, its on the pushrod side... Its not my car;"thank god" and I'll notify my friend about the pushrods, to check their lenth.. I am trying to convince him to pull the cam.... thanks for the reply, Damon

93Z Will