A year ago I had antifreeze in the oil of my 1993 Ford Ranger (4.0 litre V6). The mechanic found warped heads, planed them down, reinstalled everything and it was okay til now.
Now, antifreeze in the oil again, so he drains the oil pan, pressurizes the motor overnight and finds about a cup of antifreeze in the oil pan the next morning. So, obviously it's coming in somewhere.
The mechanic sends the heads to an engine rebuild place for testing again and they are fine. He said all of the gaskets appeared okay when they took it apart. Then he sends them the rest of the motor, they put everything back together, fill it with varsol and pressure test it overnight at 40 psi. Here's the kicker: no leaks anywhere, it holds.
Everyone is now scratching their heads because they cannot find anything wrong. I know that the 4.0 litre motors are prone to head problems, but I thought we had that covered with the replaning.
Any thoughts? Anyone else have this type of problem with this motor?
Michael