The Stovebolt Site Forums The Shop Area Engine Shop 1962 Chevy 261 Excess Crankcase Pressure!! help!

I think the EGR valve comes off the crank case, which those engines did not have. To much heat and pressure from the road vent tube at running speed. Your PCV valve should come of the valve cover. All that stuff is for smog control and was not on those engines. How ever, if you want that,I would look at how it is set up on a 250 or 292 engine from the mid 80's. Those engines are a lot like the 235's. It's been a long time since I've had a 235, but 120lb. sounds about write Also, that test should be done on a warm motor to get the best resalts. If you run a PCV valve, an EGR valve should be used. Hope this is usefull to you, good luck.