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Hot Rods Offy Early Pontiac 2x4 Water Outlets

Discussion in 'The Hokey Ass Message Board' started by mantuajohn, Sep 1, 2020.

  1. mantuajohn
    Joined: May 3, 2009
    Posts: 1,000

    mantuajohn
    Member

    Have been searching for water outlet thermostat housing for this Early Offy 5029 Pontiac 2x4 manifold. Ebay doesn't show any. Any Hamber know where they may be available? JOHN
     

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  2. Deuces
    Joined: Nov 3, 2009
    Posts: 19,753

    Deuces
    Member
    from Michigan

    Have you looked into a factory inlet that fits that manifold???? The bolt pattern looks somewhat familiar.... I could be wrong....
     
    guthriesmith likes this.
  3. 34Phil
    Joined: Sep 12, 2016
    Posts: 273

    34Phil

    Last edited: Sep 2, 2020
  4. Moriarity
    Joined: Apr 11, 2001
    Posts: 20,499

    Moriarity
    SUPER MODERATOR
    Staff Member

    I wonder if Offy made a special one for this manifold. I looked at the factory pontiac water outlets on rock auto and they don't have a bypass built in. Did you check with offenhauser? they still produce almost everything they ever made.
     
    kidcampbell71 likes this.

  5. Dang that sure looks like a FORD hole to me...

    s-l640.jpg
     
  6. Moriarity
    Joined: Apr 11, 2001
    Posts: 20,499

    Moriarity
    SUPER MODERATOR
    Staff Member

    found this pic on a google search, no info though
    offy.jpg
     
    31hotrodguy likes this.
  7. wheeltramp brian
    Joined: Jun 11, 2010
    Posts: 1,140

    wheeltramp brian
    Member

    I've had a few and they are made by offy.dont know if others fit
     
  8. Fordors
    Joined: Sep 22, 2016
    Posts: 3,407

    Fordors
    Member

    619EAE5E-7991-454D-BDBF-57F3AF3C1140.png 5DA0360F-AD09-4418-A498-E53F960DE04D.png

    I think that Offy manifold fits ‘55-‘60 engines. The screen shots I posted show the only Pontiac manifold I’m aware of that takes that thermostat housing.
     
  9. lostone
    Joined: Oct 13, 2013
    Posts: 1,540

    lostone
    Member
    from kansas

    I've got a 60 or 61 3x2 pontiac factory intake laying around somewhere and it seems that it used the same neck too. Of course my intake is missing it too.

    I wonder if 1 of the pontiac restorers make a repo ?
     
  10. Fordors
    Joined: Sep 22, 2016
    Posts: 3,407

    Fordors
    Member

    AFAIK the ‘60 Tri Power thermostat housing is unobtanium, not repro’ed.
    @mantuajohn , could you put a plug in that hole and substitute a housing?
     
  11. mantuajohn
    Joined: May 3, 2009
    Posts: 1,000

    mantuajohn
    Member

    Thanks to all who responded. Tried to contact Offy but no reply. Ford gasket is wrong size. I thought it would be easy to find one. Stupid part. JOHN
     
  12. 34Phil
    Joined: Sep 12, 2016
    Posts: 273

    34Phil

    How about Olds gasket?
     
  13. egads
    Joined: Aug 23, 2011
    Posts: 987

    egads
    ALLIANCE MEMBER

  14. Moriarity
    Joined: Apr 11, 2001
    Posts: 20,499

    Moriarity
    SUPER MODERATOR
    Staff Member

    I think I would make a spacer out of 1/2" or 3/8"aluminum. bore a proper size hole to hold the T stat against the manifold, drill 2 holes for the water outlet to bolt through it ,and drill and pipe tap for a heater hose nipple for the bypass hose. round off all the corners etc so it doesn't look billet. find a normal water outlet to fit and done....
     
    bchctybob and egads like this.
  15. hotrodj54
    Joined: Jun 1, 2007
    Posts: 622

    hotrodj54
    Member

    well not that this helps but im going threw the same issue now. i found a 59 water neck which will work. my issue is i need to put the alternator on the left side and the neck dumps the hose out in the middle of the alt.
     
  16. brading
    Joined: Sep 9, 2019
    Posts: 351

    brading
    Member

    This picture of the housing, might help you finding one. Just had a look through a 87 Offy catalogue and it does not list the housing for the 5162 manifold.
     

    Attached Files:

  17. stuart in mn
    Joined: Nov 22, 2007
    Posts: 1,896

    stuart in mn
    Member

    Ames Performance used to sell a reproduction thermostat housing for 1960 and earlier Pontiac tripower manifolds (which would have worked in this application), but it's been discontinued for some time. 1961 and newer Pontiacs didn't have that bypass passage so they won't fit.
     

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