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Welsh Plug Removal

Started by _crumpledoor_ , Sep 15 2006 10:29 PM

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7 replies to this topic

#1 _crumpledoor_

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Posted 15 September 2006 - 10:29 PM

Are welsh plugs on a 202 easy to change? What the best way to remove the worn ones? (or should i say corroded ones)

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#2 _wombat_

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Posted 15 September 2006 - 11:07 PM

hit them in above or below the centre line so that they pivot enough to get hold of them with multigrips or vice grips and pull them out. dont hit them in square or they will end up in the water jacket. put them in with a socket slightly smaller than the id of the plug(not to close a fit of the plug will grip the socket when it goes in.
i always use so aviation gasket goo on the plug but some people dont. and get brass ones not steel.

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#3 _crumpledoor_

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Posted 15 September 2006 - 11:28 PM

I assume with a hammer and chisel? Does it have to be aviation gasket goo or will normal gasket goo work?

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#4 rodomo

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Posted 16 September 2006 - 12:15 AM

Perma seal No.3 will do. Don't use a hammer and chisel. This would only destroy the old plug and make it difficult. Use a flat ended punch at the top of the welch plug to turn it in the hole. Another method to remove is to drill a hole, about 3mm at the top of the welch plug where the material is usually still good, screw in a self tapper and use a claw hammer or jimmy bar to pull them out. Run a bit off emery around the hole. Don't hit them in as suggested above as this can "dish" the welch plug as they go in making the interferance fit less. Use a flat plate or dolly to bear on the rim of the welch plug.
Good luck!

Edited by rodomo, 16 September 2006 - 12:18 AM.

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#5 Bazza

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Posted 16 September 2006 - 01:01 AM

Hi

I found this site useful - it's a Yank site (they call them "core plugs".

http://tinyurl.com/jmcsm

Bazza

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#6 _crumpledoor_

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Posted 16 September 2006 - 09:52 AM

Cheers bazza. That site is pretty useful. Glad I didnt go crazy on the old ones last night, although one already has a massive hole in it. Only the grease build up was sealing it. I decided to de-grease the engine and well what do ya know, a hole. Anyways cheers heaps, Im off to belt the crap out of them. 30 years of being in the engine, I cant imagine this will be easy.