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Wacky oil pressure!

Discussion in 'The Garage' started by bobalob, Oct 1, 2005.

  1. bobalob

    bobalob 1/2 ton status

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    Just got done replacing flat cam and figuring out how to get carbed 350 started again took for ride to play with timing and ended up just watching the oil psi.

    Before flat cam, oil psi problems 10-30w gave me 40psi at 2000-2200rpm now it has 20-50w that shop put in and pressure goes up as I accelerate to about 40psi at 2200-2500 and when i level off it starts dropping and goes down to about 20psi :confused: , it also idles at about 10psi instead of the 15psi it originally did .

    So I am guessing I still have the problem that took out my last cam. What do I look at now. help! :(
     
  2. sweetk30

    sweetk30 professional hooker Premium Member

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    good pressure is 10 psi every 1000rpms . and if 10-15 at idel then good as you dont run 1000rpm ideling.
     
  3. southernspeed

    southernspeed 1/2 ton status GMOTM Winner

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    Put a decent guage on the motor take off port and check it against your dash gauge before you do anything!
    If you're losing pressure it's prob most likely yhe pump/pressure relief valve or worn crank bearing I reckon.
     
  4. bobalob

    bobalob 1/2 ton status

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    how do i replace pump relief valve? :confused:
     
  5. randy88k5

    randy88k5 1/2 ton status

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    I believe thats in the oil pump. Its easy and cheap enough to take out. See what condition its in...
     
  6. bobalob

    bobalob 1/2 ton status

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    sure sounds cheaper than me messing with crank bearings and most likely achieving catastrophic failure :tongue1:.
     
  7. sweetk30

    sweetk30 professional hooker Premium Member

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    easy to fix. drop pan. unbolt pump . then reinstall in reverse order.:D
     
  8. southernspeed

    southernspeed 1/2 ton status GMOTM Winner

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    Check your pressure first!
     

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