Thread: Thermostat housing bolt

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  1. #1 Thermostat housing bolt 
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    can someone tell me the size of the bolt on the thermostat housing? I know its 10mm but i mean the actual thread size and length of the bolts. I need a replacement Thanks
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  2. #2 Re: Thermostat housing bolt 
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    i have no idea what size it is, but if you take the other bolt with you to a hardware store, you find a nut that fits the bolt you have and then you know what size it is, find the matching bolt you need now.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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    Quote Originally Posted by mcsddd View Post
    can someone tell me the size of the bolt on the thermostat housing? I know its 10mm but i mean the actual thread size and length of the bolts. I need a replacement Thanks
    If you go to a hardware store with the bolt they should be able to match it up for you.

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  4. #4 Re: Thermostat housing bolt 
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    There used to be a thread with this information, but I cannot find it for the life of me.

    Might have been in the FAQ section.
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  5. #5 Re: Thermostat housing bolt 
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    I am sorry I can't help you this time. ...Fastenal makes a 4in 1 combo gauge.... It consists of a rivit gauge,internally threaded screw gauge,drill and tap gauge. It comes in very handy and you will never be left wondering what size of bolt or thread dia. metric or standard. The part # is 11121072 ....I am sure you can get the samething other places.....Scott
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  6. #6 Re: Thermostat housing bolt 
    GTP Level Member FriboRage's Avatar
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    http://www.grandprixforums.net/bolt-...ead-48823.html

    Also, at Advance and I guess other auto stores, they usually have a peg board with labeled threaded holes and studs of varies sizes and coarseness of thread and it makes it really easy to figure out what it is.
    Mine has that anyway, makes it a breeze matching up bolts and nuts
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  7. #7 Re: Thermostat housing bolt 
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    That thread lists the head size,not the thread size and pitch.
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  8. #8 Re: Thermostat housing bolt 
    I live here. MoarkatsINmuhtrailer's Avatar
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    if its any help to you, my housing only has one bolt holding it down. no leaks at all
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  9. #9 Re: Thermostat housing bolt 
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    GM Part Numbers 24505628 and 11508040

    Size M8x1.25x25

    I used ARP 661-1002 bolts with 12 point heads and they fit perfectly.
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