Cooling system

Tiny
CHEST
  • MEMBER
  • 1986 GMC TRUCK
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 350,000 MILES
Steam coming out of rear tailpipe.
Wednesday, November 7th, 2018 AT 1:13 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon.

Steam is an indicator of coolant burning in the engine. In most cases, it is due to a failed head gasket.

You need to have a leak down test done on each cylinder to see if you have a head gasket leaking coolant into the cylinder.

Roy

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

https://www.2carpros.com/articles/radiator-pressure-test
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Wednesday, November 7th, 2018 AT 1:37 PM

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