wes928s

It it ok to use anti-seize on the spark plug threads ? I did and now have a miss
No I did not mix up the wires.

SeanR

Yes, use a small dab of it.

checkmate1996

double check the wires...I thought I had everything on right and sure enough 2 of them were crossed.
Anti-seize is recommended - steel to aluminum, just a bit is fine. problem is somewhere is else.

Mongo

Yes but Porsche doesn't recommend it, but they don't recommend 91 octane either here in our California cars.

borland

To avoid gauling the threads in the aluminum cylinder heads, always change the spark plugs when the engine is COLD.

The combination of steel plugs and aluminum heads makes the thread engagement tighter when HOT.

blown 87

Yes, it is ok to use it on spark plugs, but do not put it all the way to the end of the plug threads!

The rule of thumb is never closer than three threads to the end.

If you do go all the way to the end of the plug threads, there is a real possibility of some of the anti-seize to get into the combustion chamber.

The microscopic glass ***** that give the anti-seize its properties will cause detonation if any gets into the combustion chamber.

They will glow iridescent, and cause preigniton and detonation!

If they are ever get onto the top of the piston they are likely to stay there until some sort of mechanical means of removal takes it out. (Pull the heads and clean the tops of the pistons and heads.)

That is the most likely reason that Porsche does not recommend it.



PS, I doubt this is where your miss is coming from.

danglerb

Yipes.

Ever find any sign of them when tearing down an motor?

wes928s

Thanks for all thr input will change the wires cap etc

thanks all