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Thread: turbo 5.3 blowing white smoke

  1. #1
    Tuner in Training
    Join Date
    Jun 2019
    Posts
    13

    turbo 5.3 blowing white smoke

    so i took the truck out today to do some data logging and did a small pull while getting on the freeway and truck went pig rich and wouldn't let me accelerate past 4500 and was bogging out so i got off the highway and everything was running fine i pulled into a parking lot to save the log and let the truck idle for about 3 min then turned it off and did everything i needed to on the computer and turned the truck back on and it started blowing white smoke out the exhaust so i popped the hood and noticed i had a lot of smoke coming out of my blow by also coolant level is where it has always been and oil pressure was good around 40psi at idle any ideas?

  2. #2
    Sounds like a broken piston.

  3. #3
    Yep, you broke stuff. Time to open up the engine.

  4. #4
    Advanced Tuner Lakegoat's Avatar
    Join Date
    Jul 2012
    Location
    Florida
    Posts
    770
    Do you have a catch can? Or are you pulling vacuum from the valve covers into the intake? Still have PCV ?
    2005 GTO, TrickFlow 225, Magnuson 2300, 4L80, 4 link 8.8
    2013 Silverado 5.3, 6L80

  5. #5
    Tuner in Training
    Join Date
    Jun 2019
    Posts
    13
    Catch can