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  1. L

    2012 Yukon/Possible sign of bad head gasket? - SOLVED

    head gasket will cause the oil to look similar to a milk-shake. Disappearing coolant could be heater core but you will usually smell it
  2. L

    hum or howl in 4wd

    My Z71 was making a humming noise only in 4 wheel drive mode turned out to be the front wheel bearings. After I installed new bearings the noise came back after about 5 months. So I reordered wheel bearings this time I ordered the timken the humming disappeared. My wheel bearings had play in...
  3. L

    Help Diagnosing Oil leak

    thats what I was thinking but after driving the truck no oil has built up around the oil block off plate
  4. L

    Help Diagnosing Oil leak

    Well the oil plate gasket seems to have cured most of the leaking which would make someone think its the rear seal. Oil was streaming from the plate to oil filter area and blowing near the inspection plate area. This leak somehow just had formed. And I did notice my oil pan gasket seeping from...
  5. L

    Help Diagnosing Oil leak

    Well this weekend I got around to changing the oil cooler block off plate the job ended up being more than I expected. For one thing the oil cooler block off was seized to the oil pan due to some type of rubber cement gasket. I had to hit the plate with a rubber hammer to get it removed. Once...
  6. L

    Help Diagnosing Oil leak

    Yep switches to v4 at very low speed and cruising on the highway itll go to v4. Im thining the motor had to be replaced. I purchased the truck back in 2018 had 150xxx on it at the time. I did run the truck a while without AFM working due to the oil pressure switch not working correctly so when...
  7. L

    Faulty oil pressure gauge?

    looks normal. when the engine is cold I get 40 psi while driving...once warm I get around 35 psi just cruising at slow speeds.. when accelerating it does suppose to increase according to the rpm Also check your oil level make sure its good. There is also a pickup tube o-ring that can leak...
  8. L

    Radiator/transmission question

    I doubt the transmission sustained any damage just driving a few miles limping it home. I would scan the truck for codes and start from there. Misfires will also cause the service 4wd to display
  9. L

    Help Diagnosing Oil leak

    I know for sure I have AFM. Im thinking of the doing the Deflector to improve oil consumption
  10. L

    Help Diagnosing Oil leak

    Do the AFM Deflector actually help with consumption?? Also does the orientation of the holes on the oil pressure relief valve matter??? I remember when I installed my new oil pan I didnt pay attention to which way the oil holes were aligned on the oil pressure relief valve ??
  11. L

    Help Diagnosing Oil leak

    Quick Question I went with the Dorman Rear Cover that had the seal already installed and I didnt use the alignment tool I just made sure the rear crankshaft seal was good all the way around . The instructions called for me to use a dorman alignment tool but looking at how the dorman tool works...
  12. L

    Help Diagnosing Oil leak

    Spent some more time under the truck today and noticed the passenger side rack and pinion boot is wet this could be what's causing the front cover to be oily
  13. L

    Help Diagnosing Oil leak

    Do yall think marvel mystery oil would help any?? Next time I change plugs i'll try the piston cleaning procedure
  14. L

    Help Diagnosing Oil leak

    Yep im at 275xxx.
  15. L

    Help Diagnosing Oil leak

    Received the new valve cover and gasket yesterday. I went ahead and changed the oil last night and installed the new valve cover. Time to put some miles on the truck I'll report back.
  16. L

    Help Diagnosing Oil leak

    The crankshaft bolt has never been removed that I know of but ill give it a look inside the harmonic balancer to see if I can see something. There is no oil cooler there is a block plate on the side of oil pan. The valve covers have been replaced. They are not leaking at all. Im unable to see...
  17. L

    Help Diagnosing Oil leak

    No I didnt use the tool couldnt find one locally and needed to get the truck back on the road. The rear of the pan is dry. I am only seeing the oil build up near the front. sht fck it I went ahead and bought the aftermarket 12570427 seems to be identical to the GM version. Hopefully this will...
  18. L

    Help Diagnosing Oil leak

    They all seem to have the rectangle opening instead of the round opening as well.
  19. L

    Help Diagnosing Oil leak

    Thanks! Thats a pretty good deal. I will consider this for my gen 3 rebuild. Im going to try to find the cheapest driver side valve cover thats updated to see if that slows down the oil consumption. My oil pan /timing cover seems to be leaking. So ill start with the valve cover Are all the...
  20. L

    Help Diagnosing Oil leak

    Is there an updated aftermarket driver side valve cover?? I was quoted 146 locally..
  21. L

    Help Diagnosing Oil leak

    I havnt installed the updated valve cover yet. I installed new gm pick up tube o-ring and put 4 dabs of rtv where the block meets the covers. I want to assure its the timing cover gasket sort of hard for me to tell where its coming from. I cleaned that area up during the last oil change so...
  22. L

    Help Diagnosing Oil leak

    Well im back again with another oil leak after a couple of oil pan gasket changes,rear mail seal replacement and valve cover gasket replacement. Lately ive noticed my 08 tahoe has been drinking oil so I decided to check the oil pan area and I discovered the front area of the oil pan is covered...
  23. L

    Bought core block

    Well after all the previous work I ran into a problem where the camshaft would not rotate after torquing the cam bolts. While trying to solve the issue I reinstalled the old retainer plate and that did not solve the issue. Leading to the replacement ebay camshaft being the issue. I placed the...
  24. L

    Bought core block

    I went with Meiling 3srh60 timing chain to replace the old timing chain. Had a heck of a time getting it to line up but I finally got it. Is there a way to double check its timed correctly?
  25. L

    Bought core block

    Update

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