I have a 1986 F150 2WD with the 300ci 6-cylinder.

Recent work:
-Pulled the valve cover and cleaned out the return galleys
-Replaced the valve cover with new gasket
-Replaced the PCV valve
After this, I had problems with an oil-starved top end...had to replace the oil pump.

Since then it has developed a condition where it is blowing oil out of the crankcase vent filter...a lot of oil.

I can pull off the vent filter and see it puffing out at idle. I need some help figuring out what to look at.

This has me beat right now.

Thanks for any ideas,

-simpson

 

Excessive blow-by. Probably time for an overhaul. However, you can try using AutoRX to desludge it.

 

On a 300 six a compression test is pretty easy and it will tell you where the problem lies. There's a good chance your rings are leaking by.
Regards
rikard

 

I will do a compression test on it this week.

Hope that I can de-sludge it...no money for an overhaul.

-simpson