hi-temp antiseize on exhaust fasteners?

JayQQ97

MW surVivor ... MT. 279k miles
I tried some regular plain antiseize on some exhaust nuts by the cat and it just turnt to powder after a hot run
:(
 

tacojoel

Well-Known Member
I never had any luck using any type of anti seize on exhaust nuts as it wash's away anyways. Best is to use some 316 grade stainless steel nuts and bolts.
 

JayQQ97

MW surVivor ... MT. 279k miles
it washes away even with light splashing?
i can barely scrub the stuff off of my fingers and elbows without some effort!
 

tacojoel

Well-Known Member
it washes away even with light splashing?
i can barely scrub the stuff off of my fingers and elbows without some effort!
This will happen on our wet, salty roads in winter. I think the heat from the exhaust has a lot to do with it. I know what you mean as far as washing it off your hands...had the same with my hands when coating spark plug threads with it.
 

Rock62

Well-Known Member
IMHO....

Exhaust fasteners typically rust-weld onto each other and anything they contact. The most effective wrench to remove them is a gas powered wrench (ie Oxy-Acet torch) coupled with a 3 lb BFH.

I think the Copper based Anti-Seize has a higher service temperature than the Nickel base. Need to check the bottles.

BTW, isn't it amazing how a little dab gets on everything and everywhere, except where you want it?????? :rolleyes::D
 

tacojoel

Well-Known Member
Best recommendation when dealing with exhaust hardware is to use quality stainless bolts and nuts, if you plan doing your own work.
 

tacojoel

Well-Known Member
As far as toyota bolts, and nuts hardware, most are mild steel. they do have some fasteners that have brass nuts, but never seen them bolting exhaust flanges together except when use on securing the o2 sensors on the manifold, or cats.
 
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