1988 Chevy Truck what going on

1988 CHEVROLET TRUCK
276,000 MILES • V8 • 2WD • AUTOMATIC
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TSROBINSON
  • MEMBER
  • 1 POST
new thermo new radiator put 150 degree runs fine
put 190 like supposed to have runs in red line hot then will all of a sudden cool down to 190
also when does this looses about 1/4 gallon coolant
drive fine for little while then will go back hot again
150 wont let truck heater work ????
Jan 20, 2009 at 9:08 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
Hi:
It sounds like the 190 sounds bad, like it opens all at once then closes again. Have you tried a different 190? Also, if you want and have a thermostat that will reach 190 degrees, place the t-stat in water, heat it on the stove and see if it opens when it hits 190.

Let me know what you find.

Joe
Jan 22, 2009 at 7:19 AM
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