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Waterlogged foglight and indicator housings #606926
08/12/19 01:10 PM
08/12/19 01:10 PM
Joined: Jul 2019
Posts: 136
Surrey
K
Kevcaster Online content OP
L - Learner Plates On
Kevcaster  Online Content OP
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K

Joined: Jul 2019
Posts: 136
Surrey
My foglamp and offside front indicator light housings were both waterlogged. The foglamp was inoperative, rusted solid and terminal but I managed to clean and renovate the front indicator housing which was working. I have ordered a new front indicator light unit and will replace the old one once it arrives. The foglamp will be fixed/replaced by Bell and Colvill under warranty.

My question is. How can I ensure that water is kept out of the light units? It seems to me that the ingress is from the back and that the covers, such as they are, failed to keep out the road spray from underneath the wings. What do people do as a fix on this?

Kevin


Kevin

2009 Morgan Plus 4 4 seater
Re: Waterlogged foglight and indicator housings [Re: Kevcaster] #606928
08/12/19 01:25 PM
08/12/19 01:25 PM
Joined: Aug 2013
Posts: 2,561
Solihull
Spanner Juggler Offline
Talk Morgan Expert
Spanner Juggler  Offline
Talk Morgan Expert

Joined: Aug 2013
Posts: 2,561
Solihull
Not a satisfactory answer I know but after years of trying to prevent water ingress to
BL/Lucas lamps I quickly learnt that drilling a tiny pin hole (burn a pin hole through if a plastic lens is the lowest point) and a decent application of petroleum jelly (Vaseline) on the bulb holder contacts is often the best work around. 40 years later I still used this method on a tin top when 5 warranty returns failed to solve the problem. It was so bad I asked if the dealer sold goldfish as it was seemed a waste to not use the fishbowl that the rear light cluster had become (Ford Kuga).


BR Colin
Who used to be a Spanner Juggler
Re: Waterlogged foglight and indicator housings [Re: Kevcaster] #606931
08/12/19 02:16 PM
08/12/19 02:16 PM
Joined: Aug 2017
Posts: 67
Staffordshire UK
Calypso Red Offline
Just Getting Started
Calypso Red  Offline
Just Getting Started

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Posts: 67
Staffordshire UK
Hi Kevcaster, I made sure the gasket under the lens was fitted correctly with no gaps then made sure the lens screws had effective rubber seals, (I might have made my own, can,t remember) then plastered the back of the lamp fitting under the wing with under seal. No trouble since!


Calypso Red
1994 +8 BMW Calypso Red.
2002 4/4 4 seater BMW Calypso Red.
Re: Waterlogged foglight and indicator housings [Re: Spanner Juggler] #606933
08/12/19 02:20 PM
08/12/19 02:20 PM
Joined: Jul 2019
Posts: 136
Surrey
K
Kevcaster Online content OP
L - Learner Plates On
Kevcaster  Online Content OP
L - Learner Plates On
K

Joined: Jul 2019
Posts: 136
Surrey
Originally Posted by Spanner Juggler
It was so bad I asked if the dealer sold goldfish as it was seemed a waste to not use the fishbowl that the rear light cluster had become (Ford Kuga).

Excellent!

Thanks for the advice
Kevin


Kevin

2009 Morgan Plus 4 4 seater
Re: Waterlogged foglight and indicator housings [Re: Calypso Red] #606934
08/12/19 02:25 PM
08/12/19 02:25 PM
Joined: Jul 2019
Posts: 136
Surrey
K
Kevcaster Online content OP
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Joined: Jul 2019
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Surrey
Originally Posted by Calypso Red
Hi Kevcaster, I made sure the gasket under the lens was fitted correctly with no gaps then made sure the lens screws had effective rubber seals, (I might have made my own, can,t remember) then plastered the back of the lamp fitting under the wing with under seal. No trouble since!


OK thanks, this looks like another solution. I wondered about fashioning my own gaskets/covers and this seems to be the route I'll take and replace the bolts with stainless steel items


Kevin

2009 Morgan Plus 4 4 seater
Re: Waterlogged foglight and indicator housings [Re: Kevcaster] #606937
08/12/19 02:44 PM
08/12/19 02:44 PM
Joined: Dec 2008
Posts: 18,090
South Yorkshire
DaveW Offline
Roadster Guru
DaveW  Offline
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Posts: 18,090
South Yorkshire
All the above is good advice. A simple neoprene patch over the back of the unit under the wing might be enough, but the seal in the front is crucial.

Also if replacing the two setscrews, there is more than one thread in use, and most alternatives I've tried are very tight in the top hat brass female nuts.


DaveW
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) Plus 4
Re: Waterlogged foglight and indicator housings [Re: Kevcaster] #606944
08/12/19 02:56 PM
08/12/19 02:56 PM
Joined: Jan 2011
Posts: 4,022
norfolk, UK
L
lowebird Offline
Part of the Furniture
lowebird  Offline
Part of the Furniture
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Joined: Jan 2011
Posts: 4,022
norfolk, UK
I have suffered from this problem also and just like Colin I used copious amounts of Vaseline ( other petroleum based products are available ) this seemed to hold the water at bay.


Here for a good time not a long time!!
Reg
Re: Waterlogged foglight and indicator housings [Re: Kevcaster] #606979
08/12/19 04:51 PM
08/12/19 04:51 PM
Joined: Nov 2013
Posts: 338
Huntingdon
S
Scrambledsignals Offline
Learner Plates Off!
Scrambledsignals  Offline
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Joined: Nov 2013
Posts: 338
Huntingdon
Vaseline gets my vote, I smear on both sides of the sealing gasket and it keeps the water at bay.

From bitter experience, have found that overtightening the lamp screws does not provide a better seal just distorts the gasket and lets water get in.

Re: Waterlogged foglight and indicator housings [Re: Kevcaster] #606996
08/12/19 06:32 PM
08/12/19 06:32 PM
Joined: Jul 2007
Posts: 14,497
Suffolk
John V6 Offline
Member of the Inner Circle
John V6  Offline
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Joined: Jul 2007
Posts: 14,497
Suffolk
Vaseline as stated plus waxoyling the underside.


JohnV6
2006 Indigo Blue Roadster S1
Re: Waterlogged foglight and indicator housings [Re: DaveW] #609704
25/12/19 10:17 AM
25/12/19 10:17 AM
Joined: Jul 2019
Posts: 136
Surrey
K
Kevcaster Online content OP
L - Learner Plates On
Kevcaster  Online Content OP
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Joined: Jul 2019
Posts: 136
Surrey
Originally Posted by DaveW
All the above is good advice. A simple neoprene patch over the back of the unit under the wing might be enough, but the seal in the front is crucial.

Also if replacing the two setscrews, there is more than one thread in use, and most alternatives I've tried are very tight in the top hat brass female nuts.


All very good advice Dave.
I am still uncertain if the water ingress was from the front seals or the back. Here the new L691 bulb holder is installed with replacement stainless hex-head bolts. This unit comes with a new internal soft seal and a rear seal. Dave, as you predicted the captive nuts for the lens mounting screws were a different thread from the originals, I just switched them over. The new unit's mounting bolts were captive (by a crimp) and too short. I punched them out and used new stainless hex bolts.
[Linked Image]

The seal that backs the bulb holder and sits between it and the tubular mount, may well have been the point of water entry. This seal has a shallow relief for the lens retaining nuts that protrude slightly from the backplate - see top right. I think it is important for the integrity of there seal that it is positioned correctly - front to back.
[Linked Image]

I bought 60mm od 20mm id neoprene seals for the rear, they are seated behind the wing.
[Linked Image]

The neoprene seals are backed by nylon washers
[Linked Image]

Here is the view at the back of the wing. The spade connectors are temporary until I source proper sealed automotive connectors. I wrapped the leads in tape for now.
[Linked Image]

Final assembly prior to fitting the lens.
[Linked Image]


Kevin

2009 Morgan Plus 4 4 seater
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