How much is too much crank case pressure....

[Mmopars]

Does anyone know how much is too much crank case pressure or the best method to check it. We have had a rear main seal start leaking again after replacing it earlier this summer. Has a new pcv valve, line and other valve cover has a new breather. I'm wanting to actually check ccp.

 

[eldubb440]

puffing out the breather would be a good indication, lay a dollar bill over the hole, it should suck

 

[Kern Dog]

lay a dollar bill over the hole, it should suck

I've seen that trick at the nudie bar.

 

[Geoff 2]

Is it the one piece brown coloured seal? I have had a couple leak, & one in a Pontiac just disintegrated? Bad batch? Not sure.

 

[eldubb440]

I've seen that trick at the nudie bar.

here's a good trick

 

[Huicho417]

I had a similar issue with my Coronet 400. After I mildly modified the original 318 it seemed like it was building too much crankcase pressure. Pushing oil out of the breather on long trips. I purchased and ME Wagner dual adjustable pcv valve and it works great. Pricey but worth it.

Oil Leaks and Crankcase Ventilation – A Case Study – M/E Wagner Performance Products

 

[8stackhemi]

I had a similar issue with my Coronet 400. After I mildly modified the original 318 it seemed like it was building too much crankcase pressure. Pushing oil out of the breather on long trips. I purchased and ME Wagner dual adjustable pcv valve and it works great. Pricey but worth it.

Oil Leaks and Crankcase Ventilation – A Case Study – M/E Wagner Performance Products

I used the dual flow PCV valve on my Coronet after replacing the rear main seal about 4 times. It has not had any leaks since then.