thermostat cover leaking out small whole at base

snookered171

Cadet
Joined
Jul 2, 2005
Messages
6
my 98'mariner 90 3 cyl. is peeing strong after i recently replaced the water pump and t-stat, on the t-stat cover there is a small whole at the bottom of the cover, a small amt of h20 is coming out that whole, why?
 

Laddies

Banned
Joined
Sep 10, 2004
Messages
12,218
Re: thermostat cover leaking out small whole at base

The diaphram on the popet valve is bad
 

snookered171

Cadet
Joined
Jul 2, 2005
Messages
6
Re: thermostat cover leaking out small whole at base

thanks for the info, easy enough to fix my self...
 

north40

Petty Officer 1st Class
Joined
Apr 13, 2004
Messages
331
Re: thermostat cover leaking out small whole at base

Easy fix. Need new diaphram and gasket. If you have no problem getting the housing screws out it's no prob.
 

north40

Petty Officer 1st Class
Joined
Apr 13, 2004
Messages
331
Re: thermostat cover leaking out small whole at base

P.S. It's not good to run engine with water coming out here. You will have major electrical problems if you have water spouting on engine.
 
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