Overheating van

Tiny
WALKERGETX
  • MEMBER
  • 2001 CHEVROLET VENTURE
  • 140,000 MILES
This is my late father’s van that he kept garaged and maintained meticulously. I let a friend borrow it for two weeks in January in CT. He doesn’t have a garage. After about a week and 500 miles, the temperature gauge started shooting up within a couple minutes after startup. Took it to a mechanic who changed the thermostat, then the sensor, then looked at the water pump. All fine. Said he did a cylinder head check but it came out fine. Now says it has to be a cracked or warped head.

No coolant in the oil, no blue smoke out the tailpipe. Could exhaust be leaking into the coolant, creating an air pocket? Replacing the head is more than the vehicle is worth. Thoughts?
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Saturday, March 14th, 2020 AT 9:26 AM

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Tiny
KASEKENNY1
  • EXPERT
I am confused on how he checked the head and now he says it has to be cracked or warped.

I don't doubt that could be the issue but if he tested it then that shouldn't be the case.

There are a couple ways to test for this and I attached some guides here.

https://www.2carpros.com/articles/how-to-test-engine-compression

https://www.2carpros.com/articles/head-gasket-blown-test

However, we need to find out if the cooling fans are coming on or if there are another cause of this overheating.

https://www.2carpros.com/articles/engine-overheating-or-running-hot
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Saturday, March 14th, 2020 AT 12:31 PM

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