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green63
PostPosted: Sun Dec 06, 2015 9:21 pm 
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So i have a busted core plug, also called a welsh plug. Its located behind the alternator and is all crumbly and rusted. Any tips for replacing it? Its for an 1100 engine. Also would it be wise to replace all 4 at once? Any help on this would be appreciated
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Mick
PostPosted: Sun Dec 06, 2015 9:23 pm 
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Location: Under the bonnet son!
I would do the lot. If all are of the same vintage, then all will be in a similar state. They're very cheap and easy to replace, but will cause all kinds of problems when they fail.

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All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.
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drmini in aust
PostPosted: Sun Dec 06, 2015 9:28 pm 
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Location: near Baulkham Hills, NSW
Get brass ones if possible.
Drive a screwdriver into it in the middle then lever sideways to remove.
Clean the recess to bare metal, apply some Stag jointing compound or similar.
Use a small hammer to flatten the plug and spread it. Do not hit it beyond flat.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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green63
PostPosted: Mon Dec 07, 2015 10:14 am 
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Thanks for the help, any ideas on what could cause the plugs to fail, other than age?
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Mick
PostPosted: Mon Dec 07, 2015 10:18 am 
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Location: Under the bonnet son!
Nothing tricky, just age and corrosion. Steel welsh plugs are still out there and these must go eventually.

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Minicooper4me
PostPosted: Mon Dec 07, 2015 10:44 am 
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It would be wise to have the radiator cleaned out professionally and flush the block and heater core.
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