Rear Light Cluster Leak

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Paul_1978_yorks
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Rear Light Cluster Leak

#1 Post by Paul_1978_yorks » Tue Jan 05, 2016 8:21 am

I'm getting water in my boot (R8) and have determined it's coming from the offside rear light cluster.

I took it out on Sunday and siliconed around the rubber/foam seal - however it's still leaking.

I can't quite work out where it's getting in, so any assistance appreciated as I know it's a common issue, so surely someone have been through the same rigmarole!
Current:
1996-N Nightfire 420 GSi Tourer
2005 Volvo V50 1.8 Sport
Former:
1994-M BRG 214 SEi
1995-N Silver 214 SEi
1995-N Nightfire Red 214 SEi
1995-M Silver 216 SLi
1993-K Caribbean Blue 216 Cabriolet
1990-G White 416 GSi
+ a 25, 45 & 75

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1234dist
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Re: Rear Light Cluster Leak

#2 Post by 1234dist » Tue Jan 05, 2016 8:48 am

this is going to sound extreme but bare with me.

Take the rear bumper off you see vents on both sides which look like this.

Image

These are also prone to leaking.

Take it out, you will need a punch tool as its rivited and make a new gasket.
Image
Image

Then seal the fap out of it.
Image

Thanks to northener51 for the pics.
Pastor @ Rover Revival NFP Garage
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Paul_1978_yorks
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Re: Rear Light Cluster Leak

#3 Post by Paul_1978_yorks » Tue Jan 05, 2016 8:56 am

Thanks - a job for when there's some dry weather forecast!
Current:
1996-N Nightfire 420 GSi Tourer
2005 Volvo V50 1.8 Sport
Former:
1994-M BRG 214 SEi
1995-N Silver 214 SEi
1995-N Nightfire Red 214 SEi
1995-M Silver 216 SLi
1993-K Caribbean Blue 216 Cabriolet
1990-G White 416 GSi
+ a 25, 45 & 75

E_T_V
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Re: Rear Light Cluster Leak

#4 Post by E_T_V » Wed Jan 06, 2016 4:04 pm

There are 3 common ways to get water in the boot.

1. Leaking cluster seals - silicone or new foam gaskets are the usual fix here

2. Leaking vents - it is usually the car to vent seal that leaks so again a new gasket/silicone that is the issue here. The vent flap itself is usually much more reliable. R3's got only one vent whereas the R8 got 2 for some reason.

3. Sunroof drains. If displaced can leak all the sunroof water into the boot instead. Fairly obvious once you remove the boot interior trims and can see them.

Paul_1978_yorks
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Re: Rear Light Cluster Leak

#5 Post by Paul_1978_yorks » Thu Jan 07, 2016 8:51 am

It's definitely the light cluster - when I take off the bulb access panel I can see the water.
Current:
1996-N Nightfire 420 GSi Tourer
2005 Volvo V50 1.8 Sport
Former:
1994-M BRG 214 SEi
1995-N Silver 214 SEi
1995-N Nightfire Red 214 SEi
1995-M Silver 216 SLi
1993-K Caribbean Blue 216 Cabriolet
1990-G White 416 GSi
+ a 25, 45 & 75

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Vulgalour
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Re: Rear Light Cluster Leak

#6 Post by Vulgalour » Mon Jan 11, 2016 4:54 pm

I think you just diagnosed where my 414 is letting water in though. Have to get the back bumper off again - which is a good opportunity to sort the saggy bracket I suppose - and get those sealed up properly.

The water is sitting in the corners of the boot as photographed.
Image

Image

The only place I can see it might be getting in is the vents that are hidden by the bumper, you can see in that last picture that there's some water staining from it to the wetness in the boot.

I'd dismissed it being the vents because they looked okay but having seen those pictures above I'm fairly sure that's what's doing it because the water is coming in at boot floor level and soaking across the trim.
Current Fleet:
1980 Austin Princess 2 1700 HL
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1234dist
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Re: Rear Light Cluster Leak

#7 Post by 1234dist » Mon Jan 11, 2016 5:37 pm

STICKY!!!!!


:laughing2
Pastor @ Rover Revival NFP Garage
220 Coupe turbo K785OAT
218 VVC Cabriolet R220OVR
220 GTI M-series J777RAL
75 2.0 CDT P80CJM
620 SLI P267LOM HONDA
420 GSI Turbo L191CVP

alviseven
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Re: Rear Light Cluster Leak

#8 Post by alviseven » Mon Jan 11, 2016 8:37 pm

I have had water come in through the rear boot seal as well - I had a sticky hinge on one of mine which was so sticky it turned out to be pretty much seized and so had bent very slightly - only just so you know but it was enough to pull the boot lid up off the seals on the one seized side and allow water in the side.
Cured with a new hinge from another car which sadly was THE last one I have found in a yard now over three years ago.
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cabriolet106
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Re: Rear Light Cluster Leak

#9 Post by cabriolet106 » Mon Jan 11, 2016 9:14 pm

Check the water isn't coming in from higher up. Check the roof seam for leakage there may be a small pin hole under some trim. The new generation Ford Fiestas have a fault where the same thing happens.
When you remove any carpet type trim check if it's damp high up or smells. I would also check the tailgate rubber seal if it's getting tired it won't be doing its job. The other alternative is to drill a small hole where the water pools to let it escape.

montegoman
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Re: Rear Light Cluster Leak

#10 Post by montegoman » Mon Jan 11, 2016 9:42 pm

The other alternative is don't take it out when it rains!
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4V8s
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Re: Rear Light Cluster Leak

#11 Post by 4V8s » Fri Jan 15, 2016 11:43 am

I have had pretty much all these causes, but the main one I have struggled with is the boot seal.

If the catch doesnt pull the boot shut pretty tightly (on hatchback) I get water leaking in high up in the area above the boot interior light on both sides.

so if you have this issue you can try and adjust the boot latch to close tighter and see if that helps
Rover 214Si 16v 1994
Rover Mini Cooper 1997
MG ZT 260 V8 SE 2004 - OK, so another Rover
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1974 Corvette Convertible 350 V8
1977 Pontiac Firebird 403 V8

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