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Thread: 2005 6.0 burning oil BAD on startup...PCV valve issue?

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  1. #1
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    2005 6.0 burning oil BAD on startup...PCV valve issue?

    I have Been dealing with the truck smoking more and more each time on startup. It gets worse and worse each time you drive it for long periods and then let it sit. According to most people they say it is the PCV valve in the drivers valve cover...and I am guessing they are right because I popped my valve cover off (2005) and you can tell theres a baffle built into it. But I am wondering if there is any other way to fix this issue other than replaceing the valve cover. I am quite sure it is PCV related because I looked down the intake and there is a huge pool of oil just sitting right inside of it. Right now I have the valve cover soaking in brake cleaner
    Silverado Z71 10" Lift COMPLETE 6.0/4L80E PRC 2.5 Ported LS6 Heads 228r Comp Cam 3200 CIRCLE D Stall LS7 Lifters ARP Bolts SLP Oil Pump and Double Timing Chain 160 T-Stat 3" SLP Loudmouth Electric Cutout Walbro 255 Pacesetter Longtubes MSD Starter NELSON Harmess NELSON Street/Strip Tuned ECM MSD Wires LS1 Throttle Body Braided Lines Spectre CAI 4.56 Gears Detroit Locker 14 bolt http://www.ls1truck.com/forums/lsx-t...wap-build.html

  2. #2
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    May want to look into valve seals also...
    T-RAV
    99 GMC | 5.3 | Skinny White Guy Tuned

  3. #3
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    Quote Originally Posted by bangbangskeetskeet View Post
    May want to look into valve seals also...
    Thats what I originally thought...until i saw all the oil inside of the intake.
    Silverado Z71 10" Lift COMPLETE 6.0/4L80E PRC 2.5 Ported LS6 Heads 228r Comp Cam 3200 CIRCLE D Stall LS7 Lifters ARP Bolts SLP Oil Pump and Double Timing Chain 160 T-Stat 3" SLP Loudmouth Electric Cutout Walbro 255 Pacesetter Longtubes MSD Starter NELSON Harmess NELSON Street/Strip Tuned ECM MSD Wires LS1 Throttle Body Braided Lines Spectre CAI 4.56 Gears Detroit Locker 14 bolt http://www.ls1truck.com/forums/lsx-t...wap-build.html

  4. #4
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    I went the cheap route, but it works. Go to home depot, get you one of those water separators for the air compressor.
    They use 1/4 " barb fittings on each side. Get a T connector, route both line into the T, into the separator, then into the cai tube.
    Done!
    the catch can is directional, so pay attention to the flow.

    My intake was full of oil as well, about a cup worth.

  5. #5
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    Quote Originally Posted by farmtruc View Post
    I went the cheap route, but it works. Go to home depot, get you one of those water separators for the air compressor.
    They use 1/4 " barb fittings on each side. Get a T connector, route both line into the T, into the separator, then into the cai tube.
    Done!
    the catch can is directional, so pay attention to the flow.

    My intake was full of oil as well, about a cup worth.
    Ya mine is terrible...i mean B-A-D! I would say i got about a quarter to half a quart out of mine. It would blow smoke for atleast 5 minutes on a cold startup. The only problem is I want to keep my engine bay clean looking. Guess I will have to buy the new style valve covers if I want to keep the bay clean :-(. I just started it up and it still smoked after cleaning all the gunk out of the built in pcv valve in the cover, and driving it really hard to make sure there was no more oil in the intake...ugh. There has to be a better solution you and I cant be the only ones with the problem this bad. My motor has less than 100k on it!
    Silverado Z71 10" Lift COMPLETE 6.0/4L80E PRC 2.5 Ported LS6 Heads 228r Comp Cam 3200 CIRCLE D Stall LS7 Lifters ARP Bolts SLP Oil Pump and Double Timing Chain 160 T-Stat 3" SLP Loudmouth Electric Cutout Walbro 255 Pacesetter Longtubes MSD Starter NELSON Harmess NELSON Street/Strip Tuned ECM MSD Wires LS1 Throttle Body Braided Lines Spectre CAI 4.56 Gears Detroit Locker 14 bolt http://www.ls1truck.com/forums/lsx-t...wap-build.html

  6. #6
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    IF the issue is the same as my truck; the cause was an over active lifter squirting on the valve cover right in the pcv area. The vacuum would suck oil up into the hose, draining in the intake.
    If you want a cleaner look, just take both valve covers to the intake tube and that way, all you've done with add two hoses and you won't smell exhaust fumes.

  7. #7
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    There's a TSB for my '09 Escalade and it was doing the same thing, burning oil. However it wasn't the pcv system, it was the valve cover design.
    Anyway, without going into details, I did this instead of buying a new valve cover:

    took both valve cover ports to a catch can, then out the catch can into the cai tube so i don't smell any fumes. they get recirculated back into the engine.

  8. #8
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    Quote Originally Posted by farmtruc View Post
    There's a TSB for my '09 Escalade and it was doing the same thing, burning oil. However it wasn't the pcv system, it was the valve cover design.
    Anyway, without going into details, I did this instead of buying a new valve cover:

    took both valve cover ports to a catch can, then out the catch can into the cai tube so i don't smell any fumes. they get recirculated back into the engine.
    Ya I saw there was a catch can setup that kind of looks like an A/C accumulator. I was hoping there was another option rather than doing the catch can setup, or buying new valve covers.
    Silverado Z71 10" Lift COMPLETE 6.0/4L80E PRC 2.5 Ported LS6 Heads 228r Comp Cam 3200 CIRCLE D Stall LS7 Lifters ARP Bolts SLP Oil Pump and Double Timing Chain 160 T-Stat 3" SLP Loudmouth Electric Cutout Walbro 255 Pacesetter Longtubes MSD Starter NELSON Harmess NELSON Street/Strip Tuned ECM MSD Wires LS1 Throttle Body Braided Lines Spectre CAI 4.56 Gears Detroit Locker 14 bolt http://www.ls1truck.com/forums/lsx-t...wap-build.html

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