Re: [Amc-list] Leaking thermostat housing

["Bruce Griffis" <bruce.griffis@xxxxxxxxx>]

Sounds like a plan! Unfortunately, I get ahead of myself, lol.

I filed the block gasket surface. It looks nice! BUT - there is a
small nick in pretty much the area I get my pinhole leak under
pressure.

I filed the thermostat housing, and got it much nicer. And yes - there
was roughness close to the area where the nick is. So, it appears that
coolant was escaping from the nick into a rough area on the t-stat
housing.

Anyway, filed the block area. Used Permatex 2 on the block and the
bottom of the gasket. Put the gasket on. Put a little sealant on top
of the gasket. Popped on the thermostat. Put a little sealer on the
bottom of the t-stat housing. Popped in the bolts, but did not tighten
it down.

I'll let it sit for 24 hours, the add distilled water and see if it's
leaking. If that doesn't solve the problem, I'll get a new (old)
t-stat housing.

On Mon, Mar 17, 2008 at 4:06 PM, Davis Martin
<martin-davis@xxxxxxxxxxxxx> wrote:
> I would file the block gasket surface and the housing surface till it is even. Then use a small smear of RTV blue on all mating surfaces and bolt it all together. Wait 24 Hrs then you should be good to go.
>    Davis
>
>
>
>  Bruce Griffis <bruce.griffis@xxxxxxxxx> wrote:
>   Okay, I'm beating my head over the thermostat issues. I picked up a
>  new thermostat, gasket and radiator hoses. Then did different
>  iterations to work around a leak issue:
>
>  Popped self-adhesive gasket on coolant inlet on the block, popped
>  thermostat on top. Popped housing over that. Tightened. Leaked.
>
>  Put Permatex 2 neatly on the engine block side where the thermostat
>  goes. Put gasket on top. Popped thermostat on. Put Permatex 2 on
>  bottom of thermostat housing. Tightened and filled (and did not let
>  the gasket sealer cure - that could have been the issue). Leaked like
>  a sieve.
>
>  Did it again. This time taking a file to the thermostat housing trying
>  to make sure it was neat, clean and fairly level. Used Permatex 2. Let
>  it cure for 12 hours before putting coolant in. Got a pinhole leak
>  that was pretty awesome under pressue!
>
>  Talked with someone over the phone. Popped thermostat in the
>  thermostat housing. Held in tightly. Put self-adhesive gasket on the
>  thermostat housing. Popped housing on the block and tightened. Leaked.
>
>  So - time for new thermostat housing? (20 bucks used, not sure if it
>  would be any better than the one I've got) Or maybe let the Permatex 2
>  cure for 24 hours before adding coolant? Or put the t-stat housing in
>  a vise and file a little more?
>
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