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Technical Oil pressure drop ??

Discussion in 'Traditional Hot Rods' started by ace high, Aug 27, 2017.

  1. ace high
    Joined: Dec 15, 2007
    Posts: 210

    ace high
    Member

    Oil pressure start out at 60 - 70. Once engine is hot, pressure drops to 5 psi. WHAT GIVES .
     
  2. KoolKat-57
    Joined: Feb 22, 2010
    Posts: 2,966

    KoolKat-57
    Member
    from Dublin, OH

    First thing to do is check with another gauge preferably mechanical.
    If electric gauge in car maybe the sending unit is going.
    Oil pump has excessive wear, time for an oil change, weight of oil?
    Just some thoughts, KK
     
  3. squirrel
    Joined: Sep 23, 2004
    Posts: 46,707

    squirrel
    Member

    The engine is wore out.

    Or there may be some other problem, but we'd probably need more details about the engine, to help you figure out what it might be.
     
  4. BJR
    Joined: Mar 11, 2005
    Posts: 6,448

    BJR
    Member

    To get more help you might want to give us a hint as to what year, make and cubic inch engine you are asking about. But guessing and making up answers is fun also.
     
    Montana1 likes this.

  5. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 9,270

    Rusty O'Toole
    Member

    If it was a pre 54 Chev splasher, it would only have 14 pounds brand new. So ya, it makes a difference what kind of motor.
     
  6. ace high
    Joined: Dec 15, 2007
    Posts: 210

    ace high
    Member

    Sorry for being so vague. Engine is a 53 Chrysler 331 hemi rebuilt 5000 miles ago.
     
  7. lippy
    Joined: Sep 27, 2006
    Posts: 4,847

    lippy
    Member
    from Ks

    Better have a look at the bottom end I think. Lippy
     
  8. steinauge
    Joined: Feb 28, 2014
    Posts: 1,507

    steinauge
    Member
    from 1960

    Reckon the folks who did the engine might have used the old oil pump?
     
  9. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 9,270

    Rusty O'Toole
    Member

    Definitely too low. Loose bearings or an oil leak someplace.
     
  10. Mo rust
    Joined: Mar 11, 2012
    Posts: 527

    Mo rust
    Member

    I would pull the oil pump and check it out. I found out the hard way that they can go from 60 pounds pressure to none in a matter of minutes. Fortunately we got mine shut off and home without hurting the motor so a new pump and it's good to go.
     
  11. What kind of filter? I've seen the "pay me now, or pay me later" kind come apart inside and do that.
     

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