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1988 Chevy Truck what going on

Tiny
TSROBINSON
  • MEMBER
  • 1988 CHEVROLET TRUCK
  • V8
  • 2WD
  • AUTOMATIC
  • 276,000 MILES
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?
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Tuesday, January 20th, 2009 AT 5:08 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 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
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Thursday, January 22nd, 2009 AT 3:19 PM

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