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by Rex_tulips - 30/07/25 07:59 PM
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Forums34
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Aug 24th, 2023
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Joined: Jan 2016
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Talk Morgan Regular
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OP
Talk Morgan Regular
Joined: Jan 2016
Posts: 853 |
Stick it in a saucepan of warming water with your jam thermometer and see when it switches - add a couple of flying leads first and connect a meter on continuity or batteries and a lamp if you don't have one.
Make sure the otter switch head is immersed and not in contact with the pan at all.
Probably somewhere in the range of 82 - 98C. Now why didn't i think of that, thanks
Ken A.
Plus 4 2009 Centenary Metallic Red
Plus 8 1994 Dark Green (prev)
Honda CB100 The Big One
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Joined: Sep 2014
Posts: 2,272 Likes: 7
Talk Morgan Expert
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Talk Morgan Expert
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Ken
My original +8 set up was secured by a thin wire through the radiator and the bottom tank (several wrappings) , as per Colin's suggestion. I didn't like it one bit, so was doubly pleased that when I changed to Mulfab alloy radiator, and there a proper boss into which the switch screws securely.
You car deserves an alloy radiator anyway, you know it makes sense.
Andy G
1999 +8 , Indigo Blue.
Ex-John McKecknie/Mike Duncan 1955 +4 racer.
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Joined: Apr 2010
Posts: 463
Learner Plates Off!
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Learner Plates Off!
Joined: Apr 2010
Posts: 463 |
Sounds like you have the same setup as the later model MGB, once the seal perishes the switch pops out, later on they added a stainless clip.
I think your going to be better off in the long run with the brazed in housing.
Dave
98 +8 Corsa Red
74 MGB Red
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Joined: Apr 2014
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Charter Member
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Charter Member
Joined: Apr 2014
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cable tied mine in. When the rad was cold it could be pulled out by hand. 
.+8 Now gone for a 1800 4/4. Duratec in bright yellow.
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Joined: Sep 2008
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Talk Morgan Regular
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Talk Morgan Regular
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http://www.talkmorgan.com/ubbthreads.php/topics/290395/Re:_Verify_temp,_and_gauge_cal#Post290395
About halfway down the threads, seems a common problem....
Malcolm T
1966 +4
1957 TR3
1963 TR4
1983 LR 110
1985 Robin Hood 2.0l
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Joined: Jan 2016
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Talk Morgan Regular
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Talk Morgan Regular
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Many thanks for all comments and suggestions. For the time being I am fitting a replacement rubber seal and lock wiring the thermostat to secure.
Ken A.
Plus 4 2009 Centenary Metallic Red
Plus 8 1994 Dark Green (prev)
Honda CB100 The Big One
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