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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: Dec 2009
Posts: 35,791 Likes: 472
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
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If I was bothered by this problem I would be inclined to pop a 5mm hole in the back of each gauge to equalise the internal to external temperatures more readily, thus avoiding the condensation. Simples... 
Last edited by 4/4sportsfun; 27/10/14 02:25 PM.
2009 4/4 Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Connaught Green +8 prev
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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
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Thanks Nick. It was your previous posting of this communication that I was remembering.
Peter ![[Linked Image]](http://bradley.it/public_images/drive.jpg)
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Joined: Jun 2014
Posts: 532 Likes: 5
Talk Morgan Regular
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Talk Morgan Regular
Joined: Jun 2014
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No idea whether the GDI has conventional bulbs or LEDs in the instruments but I can confirm the dials mist up in exactly the same way as my previous Morgan's.
Andrew
'Alice' 2013 Duratec Plus 4. Pearl Blue
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Joined: Jun 2012
Posts: 234
L - Learner Plates On
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L - Learner Plates On
Joined: Jun 2012
Posts: 234 |
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 I was wondering why it is always only the gauge with the 3 minor gauges that mists up. Now I get it (or think I do) it is presumably the greater heat generated by the three coils driving the individual instruments compared to the single coil (or more modern movement) in the speedo and rev counter ? If anyone has a more informed explanation I'd be interested as it is one of those annoying little conundrums that it would be nice to lay to rest !
Richard
2019 M3W
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Talk Morgan Expert
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Talk Morgan Expert
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I was told by MMC - the usual - they all do that!. It clears after a drive with heater on and clears completely in the Summer.
"90MPH officer?!! - sorry my speedo was misted up!" do you think it could be an advantage.
(It was SPEEDO - no"S" on it before you lot start to comment!)
2010 4/4 sport - le mans green
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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
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If I was bothered by this problem I would be inclined to pop a 5mm hole in the back of each gauge to equalise the internal to external temperatures more readily, thus avoiding the condensation. Simples... I did........., but no effect!
Ruut Bianchi
Morgan PlusFour 2023 Bentley Midnight Emerald
Morgan 4/4 4-seater 1990 Royal Ivory
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Joined: May 2014
Posts: 5,110 Likes: 56
Black Rat Charter Member
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Black Rat Charter Member
Joined: May 2014
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I was told by MMC - the usual - they all do that!. It clears after a drive with heater on and clears completely in the Summer.
"90MPH officer?!! - sorry my speedo was misted up!" do you think it could be an advantage.
(It was SPEEDO - no"S" on it before you lot start to comment!) As if......... 
Keith
2013 narrow bodied + 4 Ruby.
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Joined: Dec 2009
Posts: 35,791 Likes: 472
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
Joined: Dec 2009
Posts: 35,791 Likes: 472 |
If I was bothered by this problem I would be inclined to pop a 5mm hole in the back of each gauge to equalise the internal to external temperatures more readily, thus avoiding the condensation. Simples... I did........., but no effect! That's a pity Ruut I thought that had a chance of improving things. Oh no I can see a system of ducted heater output making it's way up to the instruments through a series of piping any minute now.
2009 4/4 Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Connaught Green +8 prev
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Joined: Mar 2013
Posts: 96
Just Getting Started
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Just Getting Started
Joined: Mar 2013
Posts: 96 |
Have been redirected to this thread... seems I am not alone at least! My worry ios that this is a recent phenomenon for me after a very wet Classis Le Mans drive and very wet 100 miles on the M4 not long agao - it is now quite severe and I would guess clearly linked to driving in the rain those times. If it's not causing damage I can live with it, but my dial faces were bespoke made for me at Allon White's and I'd hate to mess them up 
1994 Plus 8
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Joined: Jun 2014
Posts: 11,610 Likes: 43
Wave & smile... It's a Morgan Member of the Inner Circle
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Wave & smile... It's a Morgan Member of the Inner Circle
Joined: Jun 2014
Posts: 11,610 Likes: 43 |
If I was bothered by this problem I would be inclined to pop a 5mm hole in the back of each gauge to equalise the internal to external temperatures more readily, thus avoiding the condensation. Simples... I did........., but no effect! That's a pity Ruut I thought that had a chance of improving things. Oh no I can see a system of ducted heater output making it's way up to the instruments through a series of piping any minute now. I suppose drilling a hole doesn't stop moisture condensing on the colder glass
2008 XXVII Platform, Bugatti Blue Roadster 4 Seater
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