my first mopar in need of help
hey mopar fourms I have a 1965 plymouth with the 383 big block i have got it running but noticed a lot of crankcase exaust coming from valve covers vent when i put the oil cap on left valve cover it started to push oil out rear main seal but when i removed the cap it stoped it sounds like headgasket or piston ring blow by not sure about mopar if someone could point me in the right direction what to look for thanks

 

It sounds like a bad PCV valve. Make sure it is working, just shake the valve and you should hear a rattle if not, it's stuck and needs to be replaced. Also check the breather, this allows clean air to enter the engine while blow-by from the cylinders is removed via the PCV.

To test for blown head gaskets or other major problems, try a vacuum gauge test it's easy to do. Here's a site that shows what the readings mean.

http://www.therangerstation.com/Maga...acuumLeaks.htm

 

Head gasket would not cause it.. Rings maybe ? A holed piston ??? Check the PVC as said.. Do a compression test

 

thanks for the tips i replaced all pcv valves ran my vacum off intake to pcv valves still no luck i pulled valve cover off and noticed a couple of rockers was not pumping oil on them which tells me that i need ot run crankcase cleaner through it maybe the exhuat valves r not open all the way for the exhust to relase could this be true i wanted to remove rockers but not sure how its not like a small block chevy there is 4 to 5 bolts that hold the rocker rod if i remove them will that mess up my lash adjustment thanks

 

No, provided the car has hydraulic lifters...