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oil pressure

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by GA89K5, Nov 8, 2001.

  1. GA89K5

    GA89K5 Newbie

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    I was out riding my 89 last night and stopped by a friends house. When I got back on the road I notice the oil pressure had dropped almost to 0. I got back to the house and checked the oil and I had plenty. Also, there is a hard knocking underneath somewhere when I take off real hard and sometimes shifting out of first.
     
  2. coolhandluke

    coolhandluke 1/2 ton status

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    you drove with no oil pressure?

    man, you'd better hope the gauge is messed or a wire came unplugged....

    sometimes nothing is a real cool hand

    what we have here is a failure to communicate
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    Hard knocking very well may be just the torque converter bolts loose, or a cracked flex plate. Very common source of "take off" noise. I'd be checking out that 0 oil pressure reading though, before starting it! : )



    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>www.dorianyeager.com/index2.html</a>
    Why insist on counting when the ring gear has the tooth counts stamped in?
     
  4. prjt_blzr

    prjt_blzr 1/2 ton status

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    Or spun bearings.......

    What happens if it is in neutral and you hit the throttle?? If it is a double knock then a rod bearing is toast. I would hook up a mechanical oil pressure gauge the next time you start it. If it doesn't register pressure shut it down immediately and tear off the oil pan to take a look at things.
     
  5. Blazer1970

    Blazer1970 1/2 ton status

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    0 oil pressure + bad knock = serious problem. Determine exactly what is wrong before you try to drive it any more. Most likely a spun rod bearing.

    Tim

    70 Blazer CST 4X4 350 SM465 NP205
    87 Burb 4X4 350
    01 GMC 2500HD 4X4 Duramax/Allison
     

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