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1997 Rodeo boil-over at idle.

Tiny
KYLE.D.WHEATON
  • MEMBER
  • 1997 ISUZU RODEO
  • 178,000 MILES
I have a 1997 Isuzu Rodeo, 3.2l, auto, 4x4, a/c non-functional. It has been boiling over at idle for the past several days, but runs fine at driving speeds. Pump fan is good, electric fan cycles on start-up, but, as the a/c doesn't work, that's the only time it runs. Could my pump impeller have quit working? It doesn't look like coolant is circulating.
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Monday, March 26th, 2012 AT 1:37 AM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
I would check the thermostat. The radiator may be clogged as well. The last thing I would look at is the water pump.

Roy
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Monday, March 26th, 2012 AT 1:42 AM
Tiny
KYLE.D.WHEATON
  • MEMBER
  • 3 POSTS
If the thermostat is bad, wouldn't that cause overheating while driving as well? (Confused now.)
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Monday, March 26th, 2012 AT 2:33 AM
Tiny
ASEMASTER6371
  • MECHANIC
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It could be not open enough to allow circulation at idle.

Roy
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Monday, March 26th, 2012 AT 2:35 AM
Tiny
KYLE.D.WHEATON
  • MEMBER
  • 3 POSTS
Ah, gotcha! I'll check that out. Thank you very much.
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Monday, March 26th, 2012 AT 4:55 AM
Tiny
ASEMASTER6371
  • MECHANIC
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Good luck

Roy
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Monday, March 26th, 2012 AT 5:08 AM

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