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Cooling/Thermostat


Adam B

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Car overheated, needle in the red. Bottom Radiator hose cold. Stuck thermostat.

Removed and tested in pan of boiling water. It barely opened about 2mm.

Bought a new one from Nissan (then seen the Cosworth ones for same money:dry:)

Twice now car has gone into red before thermostat opens and temps drop. This morning it didn`t open at all.

What else would cause the thermostat to stay closed?

Thanks 

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If the thermostat does not open at the correct temperature then you have a faulty thermostat.

Just because your gauge is hitting the red does not necessarily mean that you have a faulty stat.

I would start with bleeding the system and getting ALL the air out.

Also, check that your fans are kicking in.

 

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Cheers alex, Fans kick in but temp keeps climbing due to no flow through thermostat.

Changed the coolant when thermostat fitted. No air in system as far as I`m aware.

I am assuming my new stat from Nissan is ok .

I am using MotorFactor (Granville) coolant, are there different grades of coolant?

 

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