what could have caused this?

[stunna dale]

Originally Posted by old man roger

Looks like some one didn't do the clean air mod.


''If'' you have oil in your air box then you probably pumped oil from your crankcase vent tube into your cylinder.

This will cause the motor to hydro lock ..Oil doesn't compress so the connecting rod did.

Another reason could be that you blew a head gasket and filled a cylinder with coolant, coolant doesn't compress so the connecting rod did.

omr have u ever herd of the f4i pumping oil in the cylinders cuz of too much pressure in the case due to the clean air mod?! this f4i i just picked up was doin it till i took the clean air mod off. my guess is that it was building up too much pressure in the case and pushing oil past the valve seals cuz once i removed the clean air mod it quit! my f4i b4 this one i never did the clean air mod and i had 31000 miles on that motor and it never did that... parked it on the tail numerous times and i never had a prob with oil in the airbox...??? let me kno if this sounds legit cuz thats where im at with this f4i