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Q & A: Midget PCV Valve

Talked to you last night about the PCV valve on the '68 Midget ( I have owned the car all of 3 days, its a surprise for my wife as her first car was a '67 back in '69) and how I thought it was causing the engine to burn oil. Again, after the car has run for about 5 to10 min. alot of blue smoke comes out the exhaust. I also notice when running down the road there is less smoke and a lot more when starting up from a stop.
I have checked the PCV and have found oil inside, spring looks ok, as does the diaphragm and plunger. With the engine running and the PCV opened up, if I push down on the diaphragm with my finger (closing the valve) the vacuum keeps the diaphragm pulled in (down). If I increase the idle the vacuum pulls the diaphragm down into the valve housing. However, when I clean out the oil and put the PCV back together it takes longer for the smoke to appear. The oil filler cap (plastic) is not plugged as I can suck or blow air through it. Ug! The separator (can) is not clogged as I can also blow air back through the hose. The hoses to and from the valve are not cracked, matter of fact they look new. I have also noticed when I put my finger over the port coming from the separator there is, I think, a strong vacuum and a small amount of air pressure coming out of the hose from the separator. You did mention compression rings. Can't find what the speck is (psi).

Another option here for a temporary fix -- is to leave the hose from the separator loose -- vent it to the ground -- and to plug up the PCV valve. Then drive it and see if it continues to smoke.

Smoking at idle and taking off i... read more