1986 toyota 4runner

100 MILES • 4 CYL • 4WD • AUTOMATIC
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RONMELBLACK
  • MEMBER
  • 1 POST
coolant seems to be running backwards, it sprays out the radiator cap when turning it over..
I changed the head gasket because it was leaking, changed the thermostat. i did a block presure test and head and gasket are fine, took the thermostat out flushed the radiator. i removed coolant from radiator and turned it over to see if air would push out (it is not). when i put coolant in it is still blowing coolant out the cap. can water pump impellar be in backwards, the belts are on correct.
Feb 15, 2011 at 4:34 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
No, the pump can't be in backwards. If it is srtaying coolant out of the radiator when the engine is cold, it sounds like a bad headgasket. I would suggest checking engine compression to see if there is a low cylinder.
Apr 6, 2011 at 8:31 AM
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