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1991 Toyota 4WD Pickups DLX Std Bed 5-Spd

1991 Toyota 4WD Pickups
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June 11, 2012, 8:37 am

Charles G

Question: truck runs cold all the time, is thermostat stuck open?

I had head gasket leak, I put in sealer which sealed leak, but also sealed up radiator. I had radiator shop put in new radiator. The truck now is slow to warm up and runs cold on descents, normal on level and uphills. Did the radiator shop put in the right size radiator, since there two, one for manual and one for automatic, or is the thermostat stuck open?

June 13, 2012, 2:13 pm

Elizabeth K

It's the thermostat (or the temp sending unit). Even if you put in a larger radiator, the t-stat should not open until it gets to normal operating temperature.

1/1 users found this helpful.

June 13, 2012, 9:01 pm

Charles G

I put new thermostat in and the problem is solved, thankyou

0/0 users found this helpful.

June 14, 2012, 9:04 am

Elizabeth K

You're welcome. Glad to hear you got it fixed.

0/0 users found this helpful.

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