• Tiny
  • Anonymous
  • 1989 GMC S15
  • 175,000 miles

Hello. My truck has the 4.3L v6 engine. Yesterday it started smoking excessively (white smoke) when I cranked it, but it went away once I started driving it. Also, when I remove my radiator cap, it looks like red mud. It has been like this for some time now, but I have never overheated or had coolant in my oil. I replaced the radiator and hoses recently and the red mud color came back. I am also getting fault code 44. O2 sensor is farly new as well. Could this be a faulty intake gasket?

Sunday, March 3rd, 2013 AT 2:51 PM

1 Reply

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

The white smoke is burning coolant. It could be the intake or a head gasket. A leak down test will confirm.


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Sunday, March 3rd, 2013 AT 3:15 PM

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