[DML] Re: Stainless Studs In Aluminum Engine

["content22207" <brobertson@xxxxxxxxxxxx>]

Doesn't matter if electrolysis welds the studs to the heads -- the
idea is never to remove them (just the nuts).

That's why I mounted my water pump with stainless studs & nuts. Don't
care what happens to the studs -- I intend to turn the nuts only (will
actually be advantageous if the studs remain stationary). Water pump
and thermostat hardware is notorious for electrolysis because of the
moisture. One of these days I'm finally going to get around to
converting my internal water pipe and thermostat housing bolts to
carbon studs (unless someone manages to find those elusive 7mm
stainless ones) with stainless nuts, as my exhaust manifolds are.
Don't care about bolts that hold the water pump back because the pump
itself will be thrown away.

Stainless hardware is slightly softer than Gade 5 or 8.8, but we're
not talking about high load items here (exhaust manifolds just need to
be held still against the heads). Speaking of which: my theory of why
exhaust leaks are endemic to PRV's is the rediculously flimsy carbon
washers they were mounted with. Quickly rust and disintegrate,
allowing the manifolds to move slightly away from the heads. I
replaced mine with 1/8" thick washers -- stainless of course.

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, Martin Gutkowski <martin@xxxx> wrote:
> As almost all the M7 stuff is on the engine, which is ally, the jury is 
> still out on whether it's a good idea or not to mix them. I'm still on 
> the "not" side of the fence personally.
> 
> Martin
> 









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