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Thread: Removing rusty/stuck core/Welch cup plugs

  1. 21st October 2015, 02:06 PM #1
    Shakey's Avatar
    Shakey
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    Removing rusty/stuck core/Welch cup plugs

    One of mine is leaking (and I have the engine out), I've tried knocking one at an angle to get it moving and self tapers but it just pulled out with vice grips.

    Any suggestions please? I'm a bit nervous about applying heat as it started hissing!
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  2. 21st October 2015, 02:22 PM #2
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    normally just punch a hole in them with a hammer and screwdriver and lever them out
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  3. 21st October 2015, 02:33 PM #3
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    Hmm, maybe it's the edges being rusted but I'm having no luck!
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  4. 21st October 2015, 03:24 PM #4
    Phil B
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    Quote Originally Posted by Shakey View Post
    Hmm, maybe it's the edges being rusted but I'm having no luck!


    the bigger the problem the bigger the hammer.
    Old saying but true sometimes...
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  5. 21st October 2015, 05:40 PM #5
    Aussie Bob
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    Get a big screwdriver, the bigger the better. Punch it through the plug (using a hammer) and lever against the block.
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  6. 24th October 2015, 07:10 AM #6
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    Dark61
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    I'm about to do mine. Hope I don't have a similar struggle.


    Noticed you had a Caterham. That's the last place I lived in before I came out here. The showroom was still there c2000 but I think they made the cars elsewhere.
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  7. 24th October 2015, 08:03 AM #7
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    I'm going to do the other 2 today so hopefully they will be easier. I ended up destroying the front one and pushing one side in, I could then squeeze if out the whole!

    They have a factory in Dartford too I think, but caterham was taken over by a new owner so it's probably all changed again!
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  8. 24th October 2015, 08:36 AM #8
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    I usually use a large pin punch and the FBH, beat them at the edge till they either tilt or tear then pull them out while you;re at it dont forget all the screw in plugs and the little ones.

    the ones that seal the hole used to machine the cam usually never give trouble.
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  9. 24th October 2015, 09:31 AM #9
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    Thanks, I'm rapidly learning you can generally hit things a lot harder than I think!
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  10. 24th October 2015, 09:33 AM #10
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    Quote Originally Posted by Shakey View Post
    Thanks, I'm rapidly learning you can generally hit things a lot harder than I think!
    It's a bit like knowing how tight to do up a nut... which is to do it up until it strips then back off a half turn
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