can i run my 1991 toyota pickup deluxe 4wd 4cyl with NO thermostat at all?

Beck Cash

Asked by Aug 02, 2014 at 02:38 PM about the 1991 Toyota Pickup 2 Dr Deluxe 4WD Standard Cab SB

Question type: Maintenance & Repair

I removed thermostat from truck and never replaced it. is this going to cause problems with my vehicle? is thermostat necessary?

2 Answers


Not recommended. Sure, it will run fine, but can get too hot from coolant not staying in radiator long enough to cool, or vice-versa never warm up and lots of miles with a too-cool engine is not good. So bottom line, yes it's necessary, they put them in there for a reason

1 out of 1 people think this is helpful.

Your fuel economy will improve also.

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