Leak at thermostat area - DODGE DAKOTA FORUM - FORUM AND OWNERS CLUB!
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Old 03-27-2017, 01:41 PM
Hidden1 Hidden1 is offline
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Default Leak at thermostat area

I have a 02 Dakota an am having repeated leakage around the base at thermostat housing to radiator ..but there's also heater hose beside it..
There was no rubber around outter part of thermostat when removed just gasket..Do these 3.9 use rubber around the thermostat?I .It sets down on top of base flush. .

I've replaced that thermostat gasket 3 times now an used a thin bead of permatex on both sides of paper gasket ..
I didn't know if the tightness is a huge factor but I made it fairly tight.I replaced hose clamp on tube going to base also.
I also put a second clamp on heater hose an secured it.
This is noticeable in a few days as to puddle around base of thermostat

Any idea what to try on it to stop leak and what the correct torque for these 2 bolts are?
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Last edited by Hidden1; 03-27-2017 at 02:03 PM.
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Old 03-28-2017, 03:12 AM
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Quote:
Originally Posted by Hidden1 View Post
Do these 3.9 use rubber around the thermostat?

I've replaced that thermostat gasket 3 times now an used a thin bead of permatex on both sides of paper gasket.
They do not have a rubber gasket that goes around the thermostat. I would suggest either replacing the thermostat outlet. Could be bent or not flat resulting in improper seal.

When using RTV, only use it on the non-sticky side of the paper gasket. You won't need much around the perimeter. Beyond that I would just tighten them until they're tight and no further. Are you using the blue, coolant rated, RTV?
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Old 03-28-2017, 12:47 PM
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I'm using a type of permatex for water pumps.
The gasket I have is dry on both sides when new.
I will look at base that goes over it closer too
.
Not sure if it matters but on clamp to radiator hose I changed it from clamp type to screw type.
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Last edited by Hidden1; 03-28-2017 at 02:02 PM.
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