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ex manifold bolts

Discussion in 'GM 6.2 Diesels' started by sshewins, May 10, 2008.

  1. sshewins

    sshewins Jesus Freak

    May 8, 2008
    Crystal Lake, IL
    Sorry, I can't really do a search here yet, so... on the turbo side, the longer bolts have a short 1/2" threaded stub sticking out. Are they entirely nesessary? Two rusted in the manifold and well, a grinder, a big hammer, a drill and a air hammer FINALLY got them out. Did I mention they were stuck? Anyhow, I need to get a couple of new bolts, but unless I go OEM, I don't think I'll find what I need at the local hardware store IF I need that fancy bolt. Also, do I need a fancy hardened bolt or will, say, a grade 2 or 3 work? Thanks in advance guys,
  2. sshewins

    sshewins Jesus Freak

    May 8, 2008
    Crystal Lake, IL
    Hey, while I'm at it, can one (re)use a piece of the intake gasket that goes from 1 and 2 or 3 and 4? I'm cheap and the gasket on my turbo oil return tube is shot, so if I cut that middle part out and make a hole for the oil flow, would it be sufficient or do I have to wait for dealer to open?
  3. farmer0_1

    farmer0_1 stuck in the past

    May 11, 2008
    cornelius, oregon
    i dont know about the turbo stuff , but the extra stud does mount some of the engine hardware. i know the dip stick tube uses one and i thing the air cleaner holder bracket thing is another. have to go look.
  4. Blueburby1

    Blueburby1 New Member

    May 10, 2008
    Toronto Area, ON, CA
    i think the 10 grade bolts resist rot out better too, which is a huge plus with exhaust systems....as for the local hardware store, they SHOULD have a bolt you can use, if not try looking in the phone book for brafasco or fasteners, find a local bolt store....most areas have one(where do you think the construction workers go lol)
  5. D.Camilleri

    D.Camilleri New Member

    May 30, 2008
    Worland, Wyoming
    Exhaust manifold bolts are interference fit (threads fit tight so they self lock) it is best to use factory bolts. They are metric, and around grade 9.8, about grade 5 equivalent.
  6. just a number

    just a number Active Member

    May 26, 2008
    Trenton ON
    I have seen at some of the auto parts places a kit which contain all or the exhaust manifold bolts. I think they were around $15 or co. giving the headache these ones gave you it might be a cheap investment
  7. jmiller

    jmiller Recruit

    May 6, 2008
    Lake Villa, CRIL
    I bought a complete set of manifold bolts from GM, ouch. Over $200 for bolts, nuts and shields.

    The nuts for the glow plug shields ended up at $5 ea. The shortest bolts were twice the price of the longest bolts with the stud on it.

    There are universal exhaust bolt kits. Even if you buy four or five sets to get enough bolts, your still money ahead. See your local parts store, see what they can do for you.
  8. bk95td

    bk95td 6.5 nut job/addict

    Nov 26, 2008
    The sud is for mounting the heat sheilds for the glow plugs.
  9. Blueburby1

    Blueburby1 New Member

    May 10, 2008
    Toronto Area, ON, CA
    its also for the air cleaner bracket
  10. popscat

    popscat New Member

    Dec 5, 2008

    the bolts are 10mm thread pitch is 1.5 you have 88 mm long 45mm long and 65 mm long search mcmaster&carr atlanta ga. you can get anything you need there. use brass bolts if you dont wont them to rust or 316 stainless steel with antiseise on the threads. good luck
  11. Missy Good Wench

    Missy Good Wench Wild Blonde from Cloud Mt

    Nov 19, 2008
    Newberg Oregon
    The factory bolts are the ticket on these beasts.

    They are a little pricey but its worth it to have bolts that fit correctly and have the stud on the end to properly mount the heat shields.

  12. ercaduceus

    ercaduceus New Member

    Nov 7, 2008
    MGW, I think you answered this same question for me a few years back on the other site. Good to see you here.

    I switched to a new set of manifolds on my 6.5 and found out the castings are not the same. Some of the bolt holes were longer than the older set. I had to use more longer bolts with the new set. Not sure why there was a a difference. It all worked out thou:smile5: I'm not sure if there are different castings for stock 6.2 manifolds.

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