912 exhaust connections

[Jerrytex]

Is is necessary to use the copper antiseize compound on the 4 slip joints on the 912 exhaust where the exhaust pipes slip into the muffler. I know I used it on the 582 exhaust but not sure if I need to do it on the 912 exhaust.

[Dorsal]

I believe the instructions specifically call for it.

[DesertFox6]

...AND...the day will come when you will be very glad you DID use it, Jerrytex; it's only a matter of time. It's cheap insurance against "Fox Bites" on your hands when you need to do anything with the exhaust system. I also have four Harleys to take care of, and the same is true in protecting against "Hawg Bites" from those critters too: Not to mention allowing your very expensive exhaust parts to "float" as vibration dictates without seizing and cracking as a friction-welded unit.

I'll back, and expand on, what Dorsal and DesertFox4 said: Always use anti-seize on your spark plugs and exhaust hook-ups; if it's good enough for mandatory military use in such cases, it's good enough for me!

"E.T."
(With scars to prove it! )

[Jerrytex]

Copper anti seize it is. Just on slip joints or on the down pipes where they go in to the heads too? Seems like it wouldn't cause any issues.

[Dave S]

Got a related question - I know of several mechanics who use aluminum/paste based anti-seize compound - particularly for spark plugs - but also on exhaust components.

What kind of luck have people had with this stuff in place of the copper anti seize compound?????

Sincerely,

Dave S

[DesertFox6]

I've always (30+ years) used the aluminum based product from Loctite Corp.; it's called Permatex Anti-Seize Compound. It's formulated particularly for aluminum block engines and related components. It's fantastic on cylinder lug bolts, spark plugs and exhaust slip-joints; anywhere it going to be HOT with the attendant expansion/contraction problems when the parts cool.

You can find it at almost any auto-parts store; a one ounce tube cost a few bucks and I think the one hanging over my work bench is at least 10 years old and still saving knuckles. It was just as fresh and spreadable as new when I put my 912's exhaust system back together last year following an overhaul, and felt just as new on some Hawg plugs I changed out last month. Like I said, cheap insurance!

"E.T."