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Hot Rods newbie struggling with '55 or '56 Olds Engine

Discussion in 'The Hokey Ass Message Board' started by Steve Arens, Aug 31, 2019.

  1. Steve Arens
    Joined: Aug 27, 2019
    Posts: 13

    Steve Arens
    Member

    ok tried to take off the driver exhaust manifold, center exhaust port bottom bolt, does that go into a coolant passage? When I pulled it water came out
    -struggling with two outer bottom bolts, don't want to break them off, steering components limit accessibility and car is on a trailer so I can move it tomorrow, so can't get from underneath yet
    -will post picture still this week when I get it on a lift
     
  2. yes, the exhaust header bolts go into the water jackets.
    Here are some block numbers for reference and head casting numbers copied from the Olds info thread:

    1949--8A1001 TO 8A193864 H PREFIX=HYDRA MATIC
    1950--8A194001 TO 8A568689 H PREFIX= HYDRA MATIC
    1951--8C1001 TO 8C287312 B PREFIX= SYNCHROMESH
    1952--8R1001 TO 8R214478
    1953--R215001 TO R549482
    1954--V1001 TO V355083
    1955--V400001 TO V983275
    1956--A001001 TO A385513


    Head numbers that I know of:

    #2 1952
    #3 1953
    #7 1954
    #8 1955
    #10 1956

    Be cautious with rolling the engine over if it frees up. The dimple covers indicate adjustable rockers available back in the day which are very hard to source today. A frozen valve will result in broken rockers most likely, not what you want. Can you pull a valve cover and give us a pic of the valve train. When you get it off the trailer I would loosen the oil plug to see what leaks out first, hopefully old oil and not antifreeze.
    What a find you have there, stoked for you:):)
     
    loudbang and cactus1 like this.
  3. Steve Arens
    Joined: Aug 27, 2019
    Posts: 13

    Steve Arens
    Member

    thanks for the info VTWHEAD

    -not adjustable rockers, but will remove and protect the valve covers today still (in an office, not the shop)
     

    Attached Files:

    loudbang likes this.
  4. Steve Arens
    Joined: Aug 27, 2019
    Posts: 13

    Steve Arens
    Member

    thinking about broken rockers I think I will just pull the heads so that no damage occurs (or the rocker rail)
     
    loudbang likes this.
  5. that is a really clean looking top end! Maybe you will get lucky with the rest. Keep us updated.
     
    loudbang likes this.
  6. Steve Arens
    Joined: Aug 27, 2019
    Posts: 13

    Steve Arens
    Member

    ok looks like number stamped on the block is "EFD 692"; hard to tell as it has multiple strikes on some digits
     
    Last edited: Sep 6, 2019
  7. I always tell new owners of old Oldmobiles to join the Olds Clubs, both national and regional. They have advisors for every issue. That's a bitchen car, have fun with it.
     
  8. can you post that image for us? Which side of the block is the number stamped on?
     
  9. Steve Arens
    Joined: Aug 27, 2019
    Posts: 13

    Steve Arens
    Member

    great idea, will do, thanks
     
  10. Steve Arens
    Joined: Aug 27, 2019
    Posts: 13

    Steve Arens
    Member

    driver side between front two cylinders
    Olds V8 motor 001.JPG

    had to pull the motor to get the exhaust manifold off and get a good picture

    -have had 5 people look at it, picture doesn't show as well but we believe the stamped number EF D692, with the last number 2 looking like it was stamped over a light hit 8
     
  11. squirrel
    Joined: Sep 23, 2004
    Posts: 43,485

    squirrel
    Member

    My guess is that is not a factory Olds number.

    Sent from my Trimline
     
    Paul likes this.
  12. Paul
    Joined: Aug 29, 2002
    Posts: 14,406

    Paul
    Editor

    Not factory numbers, wrong size, type, spacing, alignment, prefix and number of digits

    Either the machine shop or the owner had their own identifying system.
     
    loudbang likes this.

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