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Aug 24th, 2023
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Joined: Sep 2011
Posts: 14,723 Likes: 149
Member of the Inner Circle
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Member of the Inner Circle
Joined: Sep 2011
Posts: 14,723 Likes: 149 |
If I recall someone asked the instrument maker who claimed it was the heat from the light bulbs that is the problem. It raises the temperature of the air inside and moisture then condenses on the cold glass. Heated instrument glass would solve the problem  They said it does not occur with more modern instruments that use LEDs. I can't imagine why they have not changed to LEDs if that is the case. Has anyone tried fitting LEDs instead of the bulbs?
Peter ![[Linked Image]](http://bradley.it/public_images/drive.jpg)
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Joined: May 2014
Posts: 2,774
Talk Morgan Expert
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OP
Talk Morgan Expert
Joined: May 2014
Posts: 2,774 |
Well good theory Peter, but mine does it without the lights on. I have on my 'new' dash layout a switch in the panel that allows me to turn the gauge lights on and off. Tried it both ways.
Steve
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Joined: Aug 2013
Posts: 398
Learner Plates Off!
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Learner Plates Off!
Joined: Aug 2013
Posts: 398 |
A few years back the wife of a classic Mercedes owner wrote an amusing piece in the local club magazine about what it was like being married to a Merc owner.
Among the traits described was driving endlessly round public car parks in search of a suitably secure parking spot, preferably against a wall or pillar, and always parking with the front facing out, so that the lights and Merc badge were less likely to be stolen.
The tip about parking with the instruments in the sun could go in the wives of Morgan owners list of what its being like married to a Morgan Owner.
But, in Oz at least, the sun is not good for the veneer dash!
Oct 13 build 4/4
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Joined: Dec 2013
Posts: 1,075 Likes: 1
Has a lot to Say!
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Has a lot to Say!
Joined: Dec 2013
Posts: 1,075 Likes: 1 |
I don't know what causes it. It is all very mist-erious.
John
Silver 2005 S1 Roadster V6 - Henrietta
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Joined: Jul 2009
Posts: 1,127
Has a lot to Say!
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Has a lot to Say!
Joined: Jul 2009
Posts: 1,127 |
They said it does not occur with more modern instruments that use LEDs. I can't imagine why they have not changed to LEDs if that is the case.
Has anyone tried fitting LEDs instead of the bulbs? The current Roadster 3.7´s + the Plus 4 GDI´s have LED instrument lighting as a standard.  But - guess what happens?!   So "ventilation" is the soultion (if there is any...)
It doesn´t matter how fast it becomes, but how it becomes fast.   2015 Roadster 3.7
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Joined: Jul 2007
Posts: 26,759 Likes: 424
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 26,759 Likes: 424 |
My Roadster is far worse than the +4 or 4/4 I had.
Over winter I will look at solutions.
JohnV6
2022 CX Plus Four
2025 MG ZS EV aka Trigger
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Joined: Dec 2009
Posts: 35,790 Likes: 471
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
Joined: Dec 2009
Posts: 35,790 Likes: 471 |
I have no solution as I can't say it bothers me too much as it's the Rev counter I'm interested in and that never steams up, just the oil pressure gauge does normally. I can fully understand if it does annoy you though.
My only observation based on ownership of three different models is : - If you store the car overnight with the roof up or the tonneau fully over this phenomena does not occur in the garage where my car calls home, so I find this no hardship as a remedy for a little irksome problem - typical Morgan ownership a little compromise.
Stored bereft of a cover is guaranteed misting in the winter.
2009 4/4 Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Connaught Green +8 prev
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Joined: May 2013
Posts: 986
Talk Morgan Regular
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Talk Morgan Regular
Joined: May 2013
Posts: 986 |
The fuel, temp, pressure gauge on my 2013 4/4 mists regardless of the hood being up or down in the garage or a cover being used. Doesn't worry me too much.
Andy
Laser red 4/4
Red Classic Mini Cooper Sport
Audi TT 2.0 TFSI Quatro
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Joined: Jul 2011
Posts: 287 Likes: 4
Learner Plates Off!
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Learner Plates Off!
Joined: Jul 2011
Posts: 287 Likes: 4 |
Here's the reply I received back in 2011 from the manufacturer - Caerbont Automotive Instruments http://www.caigauge.com/ (no connection). May be helpful  Hi Nick
Misting in instruments is one of our bug bears with the older design instruments, several things have been tried over the years including sachets of silicon to absorb moisture , coatings that are applied to the inside of the glass and several other ideas, the base problem is that the gauge is not sealed and if it were it would have to be sealed with air of zero humidity inside, with air of the humidity that occurs this time of year inside when the gauge is activated through the movements and the illumination, heat is created, the air inside then condenses against the cooler walls of the instrument, either the case or the glass, because glass takes longer to heat than the case because of its thermal conductivity the problem usually exhibits itself there.
We have cured the problems over the years by using instrument movements that do not generate heat ie using stepper motors and LED illumination, the current 3 in 1 is of an older design, we are working on a design to change this and will take the design to Morgan shortly.
Hope this is of some comfort
Best regards
Gavin Roberts
MANAGING DIRECTOR
Nick
Connaught Green Roadster S3 V6
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Joined: Jul 2011
Posts: 3,643
Talk Morgan Addict
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Talk Morgan Addict
Joined: Jul 2011
Posts: 3,643 |
Interesting, thanks for posting.
Ian
2011 Plus 4
Wild Mogs Reims 2019, Goodwood 2018, Isle of Man 2017, Carried on to Caramulo" 2016
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