November 19, 201510 yr I have a 1987 subaru gl 1.8 liter engine 4w4 I am replacing thermostat. What temperture thermostat do i need to use.
November 19, 201510 yr Oem from a dealer, or one of the highest grade Stant brand only. Stock is around 190 degrees. I have Stant ones in my cars now. One at standard temp, one at 180. There is a noticeable lowering of the heater output. But the cooler temp might be easier on seals and the like. Being diligent about monitoring coolant is important to avoid bigger repairs.
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