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Thread: 782 big fitting

  1. #1
    boostaholic Turbo Mopar Contributor
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    Question 782 big fitting

    Anyone know where to source those? I just had a head rebuilt and they had to cut the coolant fitting out.
    Nick G. 1984 Dodge Rampage

  2. #2
    turbo addict
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    Re: 782 big fitting

    I remember getting one online or home Depot. I think it's like 3/4 pipe thread or something? I have a few heads in the pile. Might be able to pull one out for ya.

  3. #3
    boostaholic Turbo Mopar Contributor
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    Re: 782 big fitting

    If you wouldn't mind, I'd appreciate it. The machine shop had a hell of a time getting this one out, due to dissimilar metal corrosion.
    Nick G. 1984 Dodge Rampage

  4. #4
    turbo addict
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    Re: 782 big fitting

    Yup, 3/4" NPT. If you need to find tap to repair threads, you can usually find good used sharp taps cheap on EBay. Very common size. Many times the cylinder heads aren't tapped very deep, and could use a little tweaking when rebuilding.

  5. #5
    boostaholic Turbo Mopar Contributor
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    Re: 782 big fitting

    Quote Originally Posted by 4 l-bodies View Post
    Yup, 3/4" NPT. If you need to find tap to repair threads, you can usually find good used sharp taps cheap on EBay. Very common size. Many times the cylinder heads aren't tapped very deep, and could use a little tweaking when rebuilding.
    I was warned when I picked it up, my machinist used to do these heads all the time. He recommended using a stronger thread locker, since the lands are so shallow.
    Nick G. 1984 Dodge Rampage

  6. #6
    boostaholic Turbo Mopar Contributor
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    Re: 782 big fitting

    Would there be any benefit to using an aluminum fitting instead?

    https://www.summitracing.com/parts/vpe-11204
    Nick G. 1984 Dodge Rampage

  7. #7
    Supporting Member II Turbo Mopar Contributor ajakeski's Avatar
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    Re: 782 big fitting

    The one in the bottom of the waterbox? I have some spares.

  8. #8
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    Re: 782 big fitting

    Quote Originally Posted by Nemesismachine View Post
    Would there be any benefit to using an aluminum fitting instead?

    https://www.summitracing.com/parts/vpe-11204
    I think the nipple has to be 5/8 though?

  9. #9
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    Re: 782 big fitting

    I found one in my shed. It's brass if you want it.

  10. #10
    Super Moderator Turbo Mopar Staff 135sohc's Avatar
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    Re: 782 big fitting

    A couple years ago when I came across this issue and needed one asap. Mcmaster carr had one the next day delivered their part number 5346K91 for a two pack.
    1994 Shadow Sedan. 2.2 N/A, A568 400,000 miles. "the science experiment"
    1987 Shelby CSX #418. Long term rebuild and restore ?

  11. #11
    Rhymes with tortoise. Turbo Mopar Staff cordes's Avatar
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    Re: 782 big fitting

    I'm using an AN fitting from Jegs which is 3/4" NPT to -10AN. I then use a 90* AN fitting off of that and have a -10AN to 5/8" hose barb adapter at the end for the firewall.

  12. #12
    boostaholic Turbo Mopar Contributor
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    Re: 782 big fitting

    Went that route, picked up some fittings from Jegs. Cheaper than I thought.
    Nick G. 1984 Dodge Rampage

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