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T-pan mounting bolts

Discussion in '1965-1970 Shelby Mustang GT350 & GT500' started by gjz30075, Feb 15, 2010.

  1. gjz30075

    gjz30075 Well-Known Member

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    Hi all,
    I bought a Branda repro Cobra T-pan for my '66 GT and I know the stock bolts aren't going to cut it. Looks like they need to be about 1" in length all around. And it also looks like I'll go with allen heads due to the tight clearance on the front left (into the timing cover). Can you guys verify this would be the correct length bolt for this pan?

    I'm thinking 4 x 5/16 unc by 1" and 18 x 1/4unc by 1".

    Thanks

    Greg Z
     
  2. rsimkins

    rsimkins Well-Known Member

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    Greg,

    The original parts lists call for the following:
    (18) S2MS 6676-A Bolt - Oil Pan 1/4"-20 x 3/4"
    (4) S2MS 6676-B Bolt - Oil Pan 5/16"-18 x 1
    (4) S2MS 6676-C WASHER – EXTERNAL TOOTH, OIL PAN 5/16"
    (18) S2MS 6676-D WASHER – EXTERNAL TOOTH, OIL PAN 1/4"

    I believe that the bolts were both hex-head.
     
  3. gjz30075

    gjz30075 Well-Known Member

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  4. 67200F5A02206

    67200F5A02206 Well-Known Member

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    Allen heads are a good idea except you will need a socket and u-joint to get to some of the bolt heads.

    I used the correct bolts but I had to do a lot of grinding on the pan to get enough clearance to get a socket on the bolt heads.
     
  5. gjz30075

    gjz30075 Well-Known Member

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    Thanks, good to know. I was going to use the sizes Roy provided and get them with allen heads, using some serrated washers, from my local fastener shop.
     
  6. Bob Gaines

    Bob Gaines Well-Known Member

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    The 65 GT350 used philips head screws. The 66 GT350 used the hex headed hardware store bolts with R B W markings. AMK sells both types. Bob
     
  7. SFM6S087

    SFM6S087 Well-Known Member

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    What about the carryover cars, Bob. Philips head screws like 1965 or hex head bolts like 1966?

    Thanks,
    Steve
     
  8. rsimkins

    rsimkins Well-Known Member

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    I learned something new. Must have been pretty hard to get any kind of torque on those Phillips head screws. No wonder they switched to a hex head in '66. Bob, do you have part numbers for those fasteners? S1MS 6676 maybe? What kind of washers were used?
     
  9. gjz30075

    gjz30075 Well-Known Member

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    This is interesting. I was wondering why Mustangs Unlimited (of all places) carries AMK bolt kits for '65 and '66. Now I know.
    Thanks.
     
  10. 10w30dna

    10w30dna Member

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    I used some Ford oil pan bolts from a later 5.0 truck engine. They have a smaller hex. Sorry,no part#, but look at a few Ford trucks w/ 5.0 or 5.8 circa '95/'-98 ?
     
  11. Bob Gaines

    Bob Gaines Well-Known Member

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    Star washers were used on the Phillips head machine screws. The didn't need but about 10-15 pounds of torque.Bob
     
  12. Bob Gaines

    Bob Gaines Well-Known Member

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    Steve, that was a transition period but you would more likely (safer) to have the Phillips on a carryover car then the hex head IMHO. At least until more definitive proof presents itself. Bob
     
  13. Snakepit

    Snakepit Well-Known Member

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    ++1
     
  14. SFM6S087

    SFM6S087 Well-Known Member

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    In 1965, what about the front 2 and back 2 bolts (on either side of the crank) - were those philips like the side pan bolts?

    Steve
     
  15. Snakepit

    Snakepit Well-Known Member

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    (Corrected 2/18) no those were hex headed bolts with star washers
     
  16. Texas Swede

    Texas Swede Well-Known Member

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    Jeff,
    Are you sure about this one. The front and back bolts on each side of the crank were larger in size and as far as I can tell they were hex head.
    As usual, I could be wrong and in such a case I have the wrong bolts
    (4 of them) on my oil pan.
    Texas Swede
     
  17. Snakepit

    Snakepit Well-Known Member

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    THANKS- brain fade - too many posts and emails I guess. Yes you are correct (will change my post above so no one in the future gets mislead)


    Again thanks for correcting the information supplied
     
  18. SFM6S087

    SFM6S087 Well-Known Member

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    Thanks, Swede & Jeff. Got it now. Good team work, guys.

    Steve
     
  19. Texas GT350

    Texas GT350 Well-Known Member

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    Is it very hard to pull the oil pan with the engine still in the car? I need to replace my oil pan gaskets and just wonder if it is possible and still do a good job, any advice will be appreciated.
     
  20. SFM6S087

    SFM6S087 Well-Known Member

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    Not sure about that one. Seems like I did that a long time ago. If I remember correctly I had to loosen the trans crossmember and engine mounting bolts. Then jack up the engine a bit to get clearance. I think I stuck the jack under the harmonic balancer. Probably not a good thing to do, but I was young & stupid back then. Now I'm just old & stupid. Ha, ha!

    Hopefully someone will chime in with better advice. Until then, this will at least give you something to think about.

    Have fun, neighbor!
    Steve
     

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