ok, we just bought this 94 z28.

this thing is becoming a headache, rear main seal was out when we ought it, we replaced that.

1.now the issue, the dipstick keeps "popping" out of the tube? and sprays oil all over everything.

2. take the fill cap off the valve cover and it "blows" air out instead of sucking in?

anyone???

 

sounds like

#1 you have a **** ton of blow by
and
#2 the vent on your passenger side valve cover is plugged (supposed to go by the throttle body or at the least have a breather on it)

 

1. we know it has a shitload of blow-by, but what could cause that? ive never had a problem like that.

2. the only thing on the passenger side valve cover is the oil fill cap, and a PCV valve in the back that runs to the trhottle body, driver side VC is blank. no breather holes.

 

thats not the PCV valve its the crank case vent. how many miles are on the car? it could need a new set of piston rings.

 

well i noticed it wasnt really a PCV its just a 90* fitting.

124k and i know it needs rings, so is that the cause? rings?

 

could be the PCV valve also and or a combination of the 2

 

Blowby of this magnitude is caused by bad rings. The PCV is there to allow scavenging of the blowby back into the combustion chamber, replacing the road draft tube that preceeded it in 1963. The PCV is nothing more than a check valve to prevent a backfire from getting into the crankcase, potentially causing a crankcase explosion. All engines have some blowby (no such thing as a perfect seal), but it sounds like yours is really bad. Overhaul time.

 

sounds like time for a rebuild kit!