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Technical 49-52 Pontiac fastback rad issue

Discussion in 'Traditional Customs' started by Don task, Mar 30, 2020.

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  1. Don task
    Joined: May 14, 2017
    Posts: 18

    Don task

    Hey dudes I was wondering if you can help me out. I am putting a 350 in my poncho and was wondering if I can use the stock rad. I was curious if it will hold the pressure of a 15 psi cap. If not can I get it recored to solve the problem? I really don't want to spend 600 bones for a rad.
     
  2. sdluck
    Joined: Sep 19, 2006
    Posts: 2,524

    sdluck
    Member

    Ask your rad shop,we have no way of knowing what it is or what shape it is in
     
  3. 325w
    Joined: Feb 18, 2008
    Posts: 5,374

    325w
    ALLIANCE MEMBER
    from texas

    was told years ago by a radiator guy the stock style like the tri five chevies couldn't hold that much pressure because of the way they were made.
     
  4. Don task
    Joined: May 14, 2017
    Posts: 18

    Don task

    Maybe I have to buy the expensive one.
     

  5. rtp
    Joined: Aug 14, 2007
    Posts: 149

    rtp
    Member

    I am running the original rad.in my 48 old's cooling a 350 old's motor with the 6cyc.rad. had it cleaned out and re soldered . make sure you have a fan shroud .
    We pull a camper to the mountains in September and no over heating.

    Sent from my VS987 using The H.A.M.B. mobile app
     
  6. sdluck
    Joined: Sep 19, 2006
    Posts: 2,524

    sdluck
    Member

    My model a has the stock style rad,my rad guys said to keep the cap 13 pounds or under.
     
  7. Don task
    Joined: May 14, 2017
    Posts: 18

    Don task

  8. PhilA
    Joined: Sep 6, 2018
    Posts: 794

    PhilA
    Member

    Just keep an eye open for cracks appearing, that's a lot of repeated flexing for the standard honeycomb type core.
    Mine had several cracks in the top tank and that's from the standard 7psi cap.

    Phil
     
  9. 54vicky
    Joined: Dec 13, 2011
    Posts: 1,456

    54vicky
    Member

    what honeycomb?
     

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