My Bronco has been sitting (unstarted) for about 2 years. We recently got it started again (after replacing the ignition cylinder). Now it spits a significant amount of oil out of the valve cover breather.

• The engine is not overheated.
• There isn't an excess of oil in the engine.
• This has never happened before.

Any thoughts on WHY?
Or WHAT TO DO?

1986 Full size Bronco
5.8L (351) V8

 

Check the PCV valve/connection.

 

Your building crankcase pressure and it needs to be vented. If the problem isn't correctly it'll find the weakest link and push it out there; like the valve cover gaskets or rear main seal.

 

Sounds like it stuck a ring and now has excessive blow-by.