Milky radiator fluid

2008 CHEVROLET 1500
177,000 MILES • 4.8L • V8 • 2WD • AUTOMATIC
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LARRY COOPER2
  • MEMBER
  • 1 POST
Truck overheated and check reservoir and hoses and found to have milky substance in them.
May 14, 2019 at 3:34 PM
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SCGRANTURISMO
  • ✓ASE Certified Mechanic
  • 4,897 POSTS
  • ASE Certified Mechanic
Hello,

This sounds to me like you have a blown head gasket. The substance that you found is oil and coolant that has mixed together. This happens when your vehicle's head gasket fails and no longer keeps the oil galleys and the coolant passages separated anymore. I have included a few links for you to go to below:

https://www.2carpros.com/articles/coolantantifreeze-in-the-engine-oil
https://www.2carpros.com/articles/head-gasket-blown-test
https://www.2carpros.com/articles/how-to-test-engine-compression

Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
May 14, 2019 at 3:52 PM
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