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Rebuilt 8BA flathead Oil Pressue problem

Discussion in 'The Hokey Ass Message Board' started by merc-o-madness, Jun 21, 2012.

  1. merc-o-madness
    Joined: Aug 23, 2004
    Posts: 1,544

    merc-o-madness
    Member

    I bought a rebuilt flathead 8BA(have receipts and everything). Did the 20 minute beak in period. Noticed oil pressure was good at startup, and it seems as it heats up, the oil pressure drops to 20 at about 2500 rpm and about 5 at idle. Did some researching an thought maybe the rebuilder left the front galley plug out. I ripped timing cover and gear off to check, and its in. I broke the motor in with vr1 10-30 along with a break in additive. Does this sound like a bearing/clearance issue?

    thanks!
     
  2. 1950Effie
    Joined: Sep 30, 2006
    Posts: 798

    1950Effie
    Member
    from no where

    Could be the psi relief spring in the oil pump.
     
  3. bobscogin
    Joined: Feb 8, 2007
    Posts: 1,743

    bobscogin
    Member

    A couple of other possibilities-- Fuel pump push rod bushing OK? Do you have an original oil filter system?. If so, make sure it has the proper restrictor fitting in the feed line.

    Bob
     
  4. 1950Effie
    Joined: Sep 30, 2006
    Posts: 798

    1950Effie
    Member
    from no where

    Bob is spot on with those ideas as well. Good call.
     
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  5. thesupersized
    Joined: Aug 22, 2004
    Posts: 1,357

    thesupersized
    Member

    BTT anyone else have any input?
     

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