Water temp sensor

[Frank O_ The Mountain]

While installing the temp sensor bulb in my SA, I noticed that the brass adapter was loose so I took it out and discovered that it is a "condom", a closed in device so that the temp sensor itself doesn't contact the water directly. I've never seen one of these before in all my work on T types. Have any of you seen this device? I'm wondering if I should put some medium in it to aid in heat transfer?? Any thoughts? No obscene comments from Badger either~~!! Terry

[mrbadger]

taterry@aol.com wrote:

> Any thoughts? No obscene comments from Badger either~~!! > Terry

Well gee wiz Terry. Me? I'm shocked! I wouldn't even consider such a thing. But with all this talk about condoms, lubrication, ball races, and such, I may just have to block the T-ABC website from access by my 11 year old son. Gentleman Badger

[Frank O_ The Mountain]

In a message dated 6/4/01 5:34:37 AM Pacific Daylight Time, mrbadger@home.com writes: > YOU have an an 11 year old son? Well you old dog you!! maybe you meant your grandson!! Derek, any news about Jerry? Cheers Terry

[mrbadger]

taterry@aol.com wrote:

> YOU have an an 11 year old son? Well you old dog you!! maybe you meant your > grandson!! > > Derek, any news about Jerry? > > Cheers > Terry >

Nope. He's MY kid - at least as far as I know. Last time I spoke to Jerry about a week ago, he was doing well, he sounded just like his old self and felt he was recovering - had just started his radiation treatments so let's all keep our fingers, toes, and eyes crossed.

[Forstner, Peter]

Hi, can anyone please explain me how the Water temp sensor of a TC works? It's obviously not electrical. How is the temperature measured, the measurement result transported to the dash board and displayed by the instrument? I want to install an oil temp sensor/instrument. Is this working the same way? Thanks for your explanation Peter Forstner mailto:peter@mg-tc.de Munich - Germany

[Dean Jensen]

Peter They both work on pressure. The oil gauge is straight forward, there is a bellows, and it has a needle on it, as the pressure goes up, the bellow expands, and the needle rises. The Temperature gauge works the same way, except it is a closed system, it has an inert gas in it, right off hand I do not remember what it is, but as the temp in the sensor goes up, it expands the gas in the pick up sensor, again causing the bellow to expand, and the needle to move up. You will notice that the bulb that goes in the radiator is large, and the line to the gauge is small, with a very small dia hole. You end up with a large amount of gas in the bulb, in relation to the tube. You never, never want to cut or break the line for the temp gauge, as one person said on the list, it is toast after that. You need a pro to work on both. I hope that helps Dean -----Original Message----- From: Forstner, Peter [mailto:peter@mg-tc.de] Sent: Monday, April 07, 2003 8:46 AM To: MG TABC Group (mg-tabc@yahoogroups.com) Subject: [mg-tabc] Water temp sensor Hi, can anyone please explain me how the Water temp sensor of a TC works? It's obviously not electrical. How is the temperature measured, the measurement result transported to the dash board and displayed by the instrument? I want to install an oil temp sensor/instrument. Is this working the same way? Thanks for your explanation Peter Forstner mailto:peter@mg-tc.de Munich - Germany Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

[Bullwinkle]

<<>> it has an inert gas in it, right off hand I do not remember what it is, <<>> Some sources say ether and some have said alcohol. Blake

[Donald Wilkinson]

Peter, Dean,& Bullwinkle. The "bellows" referred to is a bourdon tube, long used in fluid pressure indicating instruments,is a sort of hemispherically shaped hollow tube, which attempts to straighten out (pretty linearly) when pressure is applied. This motion is transmitted via levers and gears to an indicating needle on a card. The "gas" in the closed system used to indicate temnperatures is indeed ether, whose vapor pressure changes (linearly) with temperature changes. It is thus indeed important not to damage the fragile capillary tube. Should this occur, however, all is not lost. It's perfectly feasible for a reasonably clever do-it-yerselfer to repair one of these on the kitchen table with a soldering iron and a bottle of ether, even tho' the instrument repair cats will try to convince you that it's black magic. BTW, as we all know, (at least those of us who are politically correct), TC didn't have one of those neat combo gauges. We're supposed either to get boiling water in our faces over the folded down screen, or alternative, get one of those hip Boyce Motometer rad caps. Don TC 7993

>From: "Dean Jensen" djensen@accessus.net> >To: mg-tabc@yahoogroups.com> >Subject: RE: [mg-tabc] Water temp sensor >Date: Mon, 7 Apr 2003 09:16:41 -0500 > >Peter >They both work on pressure. The oil gauge is straight forward, there is >a bellows, and it has a needle on it, as the pressure goes up, the >bellow expands, and the needle rises. The Temperature gauge works the >same way, except it is a closed system, it has an inert gas in it, right >off hand I do not remember what it is, but as the temp in the sensor >goes up, it expands the gas in the pick up sensor, again causing the >bellow to expand, and the needle to move up. You will notice that the >bulb that goes in the radiator is large, and the line to the gauge is >small, with a very small dia hole. You end up with a large amount of >gas in the bulb, in relation to the tube. You never, never want to cut >or break the line for the temp gauge, as one person said on the list, it >is toast after that. You need a pro to work on both. I hope that helps >Dean > >-----Original Message----- >From: Forstner, Peter [mailto:peter@mg-tc.de] >Sent: Monday, April 07, 2003 8:46 AM >To: MG TABC Group (mg-tabc@yahoogroups.com) >Subject: [mg-tabc] Water temp sensor > >Hi, >can anyone please explain me how the Water temp sensor of a TC works? >It's >obviously not electrical. How is the temperature measured, the >measurement >result transported to the dash board and displayed by the instrument? > >I want to install an oil temp sensor/instrument. Is this working the >same >way? > >Thanks for your explanation >Peter Forstner > >mailto:peter@mg-tc.de > >Munich - Germany > > > >Your use of Yahoo! Groups is subject to >http://docs.yahoo.com/info/terms/ > > > > > > > >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > >

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[Geach, Nigel (Crofton)]

I recall it smelled strongly of ether when I cut mine about 20 years ago! Still trying to figure out how to fix it! Cheers, Nigel TC 0710 -----Original Message----- From: Bullwinkle [mailto:yd3@nvc.net] Sent: Monday, April 07, 2003 10:01 AM To: Dean Jensen Cc: mg-tabc@yahoogroups.com Subject: Re: [mg-tabc] Water temp sensor >> it has an inert gas in it, right off hand I do not remember what it is, >> Some sources say ether and some have said alcohol. Blake Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

[Malcolm Taylor]

If you are considering a DIY repair to one of these PLEASE remember that ether is not chemically inert. It is very highly flammable. It also has a very 'heavy' vapour which can roll along a bench or table and be ignited by a naked flame some distance away. Do not have a flame in the vicinity just in case you have a spillage. It is also quite a good anaesthetic so don't breathe in too much! Malcolm Taylor TA1250, Huddersfield, England. [Non-text portions of this message have been removed]