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| The Pub For General Automotive Related Talk |
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01-08-2014, 11:04 PM
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Regular Member
Join Date: Oct 2013
Location: Gold Coast
Posts: 225
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Why do we have Welsh plugs?
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01-08-2014, 11:07 PM
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Racing improves the breed
Join Date: Apr 2006
Location: SE Melbourne
Posts: 3,982
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From memory they're a necessity when blocks are manufactured.
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01-08-2014, 11:12 PM
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Regular Member
Join Date: Oct 2013
Location: Gold Coast
Posts: 225
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Thanks that could explain it. Mine were totally rusted out, had to replace them all...
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02-08-2014, 08:53 AM
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FF.Com.Au Hardcore
Join Date: Mar 2005
Posts: 1,229
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Check out these links for aluminum block casting photos by the Healey Factory for its Healey 3000 engine project. I think it illustrates the function of the Welch plugs as Grippy and ohzone mentioned.
cheers Bill. http://www.healeyfactory.com.au/dmd/...attern-making/ http://www.healeyfactory.com.au/dmd/...s/dmd-casting/
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AUII XR6 VCT ute 20 years and still going strong! |
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02-08-2014, 08:59 AM
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#6 | ||
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Regular Member
Join Date: Oct 2013
Location: Gold Coast
Posts: 225
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What interesting links, thanks Bill...
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Series 1 AU Fairmont Wagon with a few mods... |
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02-08-2014, 10:25 AM
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#7 | ||
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Boss 335
Join Date: Jan 2006
Posts: 4,330
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Why are they called welsh plugs? A guy from Wales invented it ?
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02-08-2014, 10:27 AM
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#8 | |||
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Regular Member
Join Date: Oct 2013
Location: Gold Coast
Posts: 225
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Quote:
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Series 1 AU Fairmont Wagon with a few mods... |
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02-08-2014, 10:38 AM
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#9 | |||
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Former BTIKD
 
Join Date: Mar 2005
Location: Sunny Downtown Wagga Wagga. NSW.
Posts: 53,197
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Quote:
According to Nevin Hubbard of the M.D. Hubbard Spring Company, the Welch plug was originally designed in the 1900s by the Welch brothers at the Welch Motor Car Company of Pontiac, Michigan. Hubbard claims that "at that time core holes in the engine blocks were fitted with pipe plugs. During one of these run-ins a pipe plug backed out. In order to get back on the road one of the brothers drove a quarter or half dollar into the hole. From this they developed the Welch plug, some with the help of my great grandfather Martin Hubbard. They then patented the plug and the M.D. Hubbard Spring Company become the sole manufacturer of the Welch plug for the life of the patent."
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02-08-2014, 11:05 AM
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Performance moderator
 
Join Date: Feb 2005
Location: St Clair..N.S.W
Posts: 14,875
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Where I came they are called "frost plugs" . If coolant , in this case water froze . The plugs popped out .. So hopefully no damage was done to block..
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02-08-2014, 03:49 PM
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#11 | |||
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FF.Com.Au Hardcore
Join Date: Mar 2005
Posts: 1,229
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Quote:
I had a dig in my parts stash and found a box of Hubbard welch plugs for the WW2 jeep. cheers Bill.
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AUII XR6 VCT ute 20 years and still going strong! Last edited by Bill M; 25-01-2015 at 02:17 PM. |
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02-08-2014, 03:55 PM
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Moderator
  
Join Date: Jun 2006
Location: Foothills of the Macedon Ranges
Posts: 18,606
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Quote:
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02-08-2014, 05:29 PM
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black xb
Join Date: Jan 2006
Posts: 1,258
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similar to what ebxr said, above, I called USA to order some for my Packard. The guy didn't know what I was on about. Eventually we spoke the same language when I called them 'freeze plugs'
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Welsh Plugs
Linear Mode
