Overheating even after replacing a lot of components?

Tiny
ALLISON JG
  • MEMBER
  • 2013 CHEVROLET CRUZE
  • 1.4L
  • 4 CYL
  • TURBO
  • AUTOMATIC
  • 167,000 MILES
Hi there! The engine keeps overheating and losing coolant (no coolant leak).

I have replaced the thermostat, water pump, turbo, and fan.

I was wondering if a bad ECT sensor could make the engine heat to the point where the coolant is boiling and spitting out?

I know that I have to replace the crank seal because I'm losing a little bit of oil, is that related as well?
Tuesday, April 8th, 2025 AT 10:43 AM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 14,515 POSTS
That isn't a good sign, losing coolant and overheating are classic signs of a bad head gasket. I would pressure test the cooling system, then use a combustion gas test.

https://www.2carpros.com/articles/radiator-pressure-test

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

See if it passes both. You could also pull the spark plugs; they should be a tan-brown color. If you find one or more that are very clean or look glazed, it's the head gasket.
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Tuesday, April 8th, 2025 AT 3:18 PM

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