The ford clinic that I attended said that no aniseize should be used for this reason. They repordedly have seen problems with this, as the oil goes directly to the plug not swerling around in the combustion chamber. Jimmsimm You probably know better than ford though.

 

HI!... I've been using anti-sieze on spark plug threads for years. On motocross bikes, cars, trucks........ If it's got a plug I've used it on it at one time or another. Never had a problem.

 

Sorry I posted this wrong it was suposed to be under spark plug torque. Neal I agree with you I also used to use it on any plug in aluminium. I can only tell you what I was told in the 5.4 clinic. Btw very nice porting on your heads were they done in canada?

 

HI!... Thanks, No they were done at FOX LAKE/TROYER PERFORMANCE in OHIO/VIRGINIA.