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  1. #1
    Member Woznaldo's Avatar
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    Cylinder Block Coolant Drain Plug - Thread Type?

    I've misplaced my drain plug and can't remember the thread type. I think it's 1/8" NPT?

  2. #2
    Committee, Moderator Matt Cole's Avatar
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    Re: Cylinder Block Coolant Drain Plug - Thread Type?

    Ooo. Good question. I will check my spare in garage......

  3. #3
    Committee, Moderator Matt Cole's Avatar
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    Re: Cylinder Block Coolant Drain Plug - Thread Type?

    Name:  20170917_123205.jpg
Views: 40
Size:  124.4 KBName:  20170917_123259.jpg
Views: 40
Size:  90.3 KB

    It appears to be some crazy metric thread. M10x0.9mm

  4. #4
    Member Woznaldo's Avatar
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    Re: Cylinder Block Coolant Drain Plug - Thread Type?

    Quote Originally Posted by Matt Cole View Post
    Name:  20170917_123205.jpg
Views: 40
Size:  124.4 KBName:  20170917_123259.jpg
Views: 40
Size:  90.3 KB

    It appears to be some crazy metric thread. M10x0.9mm
    That is weird! Is it tapered?

    Thanks for the reply?

  5. #5
    Member Woznaldo's Avatar
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    Re: Cylinder Block Coolant Drain Plug - Thread Type?

    Found this. Didn't even know it was a thing? Metric tapered thread:
    Attached Images Attached Images

  6. #6
    Committee, Moderator Matt Cole's Avatar
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    Re: Cylinder Block Coolant Drain Plug - Thread Type?

    It doesn't appear to be tapered.

  7. #7
    Member Woznaldo's Avatar
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    Re: Cylinder Block Coolant Drain Plug - Thread Type?

    Quote Originally Posted by Matt Cole View Post
    It doesn't appear to be tapered.
    I would have thought it would need to be tapered as the plug doesn't have a shoulder to torque against?

  8. #8
    Member michael tierney's Avatar
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    Re: Cylinder Block Coolant Drain Plug - Thread Type?

    1/8 bsp
    Likes Trevhib liked this post

  9. #9
    Member Woznaldo's Avatar
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    Re: Cylinder Block Coolant Drain Plug - Thread Type?

    Quote Originally Posted by michael tierney View Post
    1/8 bsp
    Thanks Michael. Very much appreciated.

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