proper way to put on thermostat - MustangForums.com


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Old 06-11-2005, 01:07 AM   #1
099gt
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Default proper way to put on thermostat

i had coolant coming from the thermostat so i went out and bought a 180 degree therm. and new rubber seal with it. and the thing still leaks is there some special way to put it on?
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Old 06-11-2005, 02:02 PM   #2
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Default RE: proper way to put on thermostat

come on i no a few of u have done thermostats has any of yours leaked after u put it on
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Old 06-11-2005, 02:07 PM   #3
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Default RE: proper way to put on thermostat

did you use silicone sealer (rtv) on both sides of the gasket and the housing?
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Old 06-11-2005, 03:10 PM   #4
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Default RE: proper way to put on thermostat

no.....the could be the problem i didnt see any old sealer on it so i thought u could just replace it
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Old 06-11-2005, 04:30 PM   #5
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Default RE: proper way to put on thermostat

Sounds like you have a cracked manifold[] THey usually crack out the t-stat housing....same thing happend to me. I thought it needed a new o-ring,, but it turned out there was a crack inside the t-stat housing.
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Old 06-11-2005, 04:32 PM   #6
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Default RE: proper way to put on thermostat

On my camaro, the same thing happened. After 2 new thermostats i used the rtv on the gasket and it was fine. If that doesnt work you prob do have a cracked t-stat housing or manifold like devinsteen said.
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Old 06-11-2005, 05:08 PM   #7
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Default RE: proper way to put on thermostat

First remove the 2 bolts... remove rubber gasket and then thermostat. Put in new thermostat, put rubber o-ring/seal over it and put hose back on and tighten bolts down.... If it doesnt work something is wrong.
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Old 06-11-2005, 06:28 PM   #8
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Default RE: proper way to put on thermostat

hes got a 99 though, so its not likely to be a crack manifold. sometimes when i change o rings i bolt em down too tight so they twist and leak. definetly unbolt it and check, and use the gasket sealer..it saves lives.
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Old 06-11-2005, 06:54 PM   #9
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Default RE: proper way to put on thermostat

99's were just as bad. THey didn't use the alum. crossover until late '01.
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Old 06-11-2005, 07:17 PM   #10
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Default RE: proper way to put on thermostat

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ORIGINAL: Acer2428

99's were just as bad. THey didn't use the alum. crossover until late '01.
Thank you Acer. Like I said, it might be cracked....hopefully it's not. But it's not just going to leak coolant for no reason.
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