Replaced my thermostat. But it overheats. Heater does not blow warm air until temperature gets very hot. Hose from thermostat gets hot but bottom hose on radiator is cold. Overflow tank fills up.

Asked by Jan 27, 2016 at 08:32 AM about the 1996 Nissan Quest 3 Dr XE Passenger Van

Question type: Maintenance & Repair

I don.t know what else to do.

1 Answer

65,865

You need to purge the air from the cooling system by leaving the radiator cap off and running it until warmed up and refilling the radiator as necessary during this process. Coolant may be pushed out of the radiator until the thermostat opens up, but that is just the air pockets coming out. Refill as necessary.

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