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Engine will overheat sporadically

Tiny
KENHOLLEY
  • MEMBER
  • 1998 PLYMOUTH VOYAGER
  • 226,000 MILES
Engine will overheat sporadically. New water pump and thermostat with no improvement. I can stop and turn it off, and the coolant is boiling in the reservoir. After only 15 or 20 minutes, I can re-start it, and the temperature will return to normal, maybe climb again shortly, or stay normal. I even tried running without a thermostat with no improvement, so I put another new one in, just to be sure. Both radiator fans seem to be working OK.
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Monday, November 12th, 2012 AT 1:59 AM

6 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Flush out the radiator and then bleed the cooling system and see what happens-Continue to overheat-have it chemically tested-
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Monday, November 12th, 2012 AT 11:10 AM
Tiny
KENHOLLEY
  • MEMBER
  • 3 POSTS
Thank you for your response. I just had the water pump installed last week, which would have pretty much drained the system, I guess. They used 2 gallons of coolant to refill it. Wasn't a flush, though. I'll try that. I've never heard of the chemical testing. What chemical and test for what?
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Tuesday, November 13th, 2012 AT 12:16 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
They call it Bloc Chek its liquid that turns to different color when it indicates a blown headgasket-
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Tuesday, November 13th, 2012 AT 12:23 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Refer to this link: http://www.blockchek.com/
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Tuesday, November 13th, 2012 AT 12:24 AM
Tiny
KENHOLLEY
  • MEMBER
  • 3 POSTS
Thank you, if the head gasket were blown, wouldn't I see water in the oil or oil in the coolant?
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Tuesday, November 13th, 2012 AT 12:25 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Have you tried bleeding it out? If not do it and see what happens
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Tuesday, November 13th, 2012 AT 12:29 AM

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