AC Owners Club Forum
AC Owners Club Forum => Ace, Aceca & Greyhound Forum => Topic started by: pjbowman on August 24, 2015, 02:49:52
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My Ace seems to actually be running too cool, so I'm guessing I need to replace the thermostat - either there is none in the housing, or it's stuck open. What cars used the equivalent thermostat and gasket? TR2 looks similar from the parts diagram, anyone know for sure?
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The original bellows type thermostat fitted to the AC engine is pretty large both in height and diameter when compared to a modern unit. What you could do is have a look at your local parts supplier for a modern unit with a suitable temperature range and then fit this unit in the original housing using a brass or aluminium spacer ring. This ring locates in the recess in the original housing and is simple to make if you have access to a lathe. The gasket can be easily cut out from thick Klingersil type gasket paper.
Regards Luke.
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Luke (or anyone) - do you have a picture of an original thermostat? And maybe measurements?
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Yes,I've got an old thermostat somewhere & will post photos and measurements later today.
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The thermostat measures 2 5/16" diameter is 3 3/8" tall and the lip where it sits in the housing recess is 5/32" thick.
The original Smiths part No. is 30063/18 and the opening temperature is marked as 78 c 172f.
(http://i806.photobucket.com/albums/yy350/LukeCars/20150825_151357_zpsyih53adh.jpg) (http://s806.photobucket.com/user/LukeCars/media/20150825_151357_zpsyih53adh.jpg.html)
(http://i806.photobucket.com/albums/yy350/LukeCars/20150825_151237_zpsx1sbgxxr.jpg) (http://s806.photobucket.com/user/LukeCars/media/20150825_151237_zpsx1sbgxxr.jpg.html)
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Thames Ditton advised me March /97 "Should thermostat need to be replaced, fit aluminium washer to indentation in housing top face and size accordingly for a Ford bellows type replacement."
This advice is basically what Luke advised except for the additional info re the Ford replacement.
The markings on my original thermostat were "Smiths 3065/8 78C 172F."
Jonathan
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Thanks gents! I'll probably wait for winter weather before I pull the housing off to see what (if anything) is in there. Good to have this info.