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Thread in 'Introductions' started by Matt Chamberlain, Oct 9, 2019.

  1. Matt Chamberlain

    Matt Chamberlain Member 1st Gen Owner 4 Wheel Drive V6 Engine

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    IMG_2870.JPG New to the site. Have owned a 2002 4WD 4.10 LSD for a few years and love it. Recently, had the Oil Pressure gauge flutter, replaced the sensor, and flutter remained, so I'm dropping the Upper Oil Pan as I type this and will install a replacement oil pump. I'm hoping that the pressure relief valve is to blame. Jumped on here to share my success / sob story! :)
     
    Last edited: Oct 9, 2019
  2. Todd Z

    Todd Z Well-Known Member 2nd Gen Owner V6 Engine V8 Engine

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    Hope its not timing chain guide plastic parts jammed in there.... Common failure....
     
  3. Matt Chamberlain

    Matt Chamberlain Member 1st Gen Owner 4 Wheel Drive V6 Engine

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    Yep, looks like primary tensioner and springs were in the pan. Will pull valve covers and inspect guides as best as I can today. Will hit oil pressure line with compressed air and look for debris in the heads that restricts oil retutning to the pan.
     
  4. Todd Z

    Todd Z Well-Known Member 2nd Gen Owner V6 Engine V8 Engine

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    Sadly that motor needs to come out and have all the chains and guides replaced or replace the motor.
     
  5. Matt Chamberlain

    Matt Chamberlain Member 1st Gen Owner 4 Wheel Drive V6 Engine

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    I would not dispute that that is what it "NEEDS," but dropping the girdle pan and swapping in a new oil pump is what she's "GETTING." :)
     
  6. Matt Chamberlain

    Matt Chamberlain Member 1st Gen Owner 4 Wheel Drive V6 Engine

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    Old oil pump doesn't look bad - will throw the new one in and button her back up and see what is what tomorrow!
     
  7. Matt Chamberlain

    Matt Chamberlain Member 1st Gen Owner 4 Wheel Drive V6 Engine

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    Ended up reinstalling the original oil pump as the new one was cheap and ill-fitting. Found the cause of the low oil pressure looking up from below at the primary chain, though! The primary timing chain guide bolts backed themselves out letting the nub out of the oiling hole! The guide was a couple mm from falling off, and the tensioner is wasted. Drastically lowering oil pressure to all points North! I stole this picture of the oil passage hole with green arrow - just to the right is where the oil pressure switch lives. Will remove timing cover tomorrow and will receive tensioner tomorrow.
     

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  8. Matt Chamberlain

    Matt Chamberlain Member 1st Gen Owner 4 Wheel Drive V6 Engine

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    IMG_2940.JPG Found the broken nub, replaced the primary chain guide, tensioner, and dammit, the balance shaft tensioner is cracked - so have a replacement due tomorrow and will button it up.
     
    Last edited: Oct 14, 2019 at 4:38 AM
  9. Matt Chamberlain

    Matt Chamberlain Member 1st Gen Owner 4 Wheel Drive V6 Engine

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    Got it wrapped up! Sounds great. Next on the list is to replace the exhaust - there is debris trapped between the cats, dancing around. :)
     

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