Oil in coolant

[HI Cobra]

Any coolant in the oil? Like milky looking oil? Or is it a one way street -
oil going in the coolant? Coolant in the oil can be from a bad head gasket,
warped head, or similar malady. Good luck with finding the problem - I
don't think you want to run it any more until you do.

[RICK LAKE]

MaSnaka Try the FE forumn. Royce, Dave Shoe, Barry R., and other have 40-45 years with FE motors. It does not sound good, the only thing I can think of is did you or the assemblier install the head gasket the wrong way. It can go on either way, the motor will run fine but after about an hour it runs hot. Felpro gasket have arrows that point forward to install, you have to flip 1 gasket to keep the arrow forward. If you search on the FE forumn it shows you what to look for. I don't want to get this wrong for you, but you are looking for a tab on each side, I THINK. And I just built my stroker in Sept last year. The other thing is a small crack that when the motor cools is sucks oil into the coolant system. You could try a coolant sealer for the motor. I would first check the gaskets. Where the heads and block pressure tested before and work done? Some machinist use 100 psi and in a water tank over night. It's not 100% perfect but does catch problems. Try Gessford machine for help. Rick L. Good luck

[patrickt]

I agree with Rick L. -- post a message on the FE forum 332-428 Ford FE Engine Forum and invite suggestions. You're likely to hear a recommendation to pull the rockers, pressurize the coolant, and see if you see something bubbling out. You might also receive this suggestion:

Try sealing the head bolts using liquid teflon thread sealer on the bolt threads. Pull the 2 head bolts where the oil comes up from the block, clean the threads with spray carb cleaner like Berryman's and wipe the hole clean and dry, this is very important. Coat the threads of the head bolts with liquid teflon thread sealer and re-install, torque to specs. Re-install the rockershaft. Flush the cooling system with machine dishwasher detergent such as Cascade [low sudsing], it may take a couple of treatments to get the system clean as oil will mess up the radiator and cooling system. If you live a charmed life and the stars are in alighnment the teflon will seal the crack in the deck of the block where the oil passage and the head bolt hole are the closest. I had the same problem with a D4TE block and using the recommendations of "Engbldr" of this forum I cured the oil-in-the-coolant problem. No guarantees this will work but it just may save you a whole lotta work if it does. Otherwise the engine has to come out and be torn down to do the sleeve-in-the-oil-passage trick if you go by the AERA service bulletin issued for this problem.

[undy]

..look to your intake gaskets for the minor weeping. FE intake gaskets are their Achilles heel for internal coolant leaks. What brand gaskets are you using??

Dave

[ENTDOC]

perhaps a small amount of oil found its way into a water passage during the build and you have no problem at all. I would flush the system and look again. If there is no water in the oil then I feel you are pretty safe.

[c6ae]

This is a pretty common FE problem.
It can usually be attributed to a cracked block.
There are a couple of “fixes”
Gessford has published the AERA (automotive engine rebuilders association) bulletins regarding the cause and repair of this problem.
Here; Gessford.com
(I have done the repair in the vehicle, a gamble, but it was just a car with a 390 and the risk of failure was not as critical as an expensive performance engine)