Help Tracing A Leak

solarsailor · 22nd January 2018, 15:25

In my original post on the subject (https://the75andztclub.co.uk/forum/s...d.php?t=277968) I stated that I'd taped over a split in the rear window seal which I assumed was allowing water into the boot and accumulating in the area near the offside rear light, but it's now back to square one.

After a weekend of persistent rain, with some snow thrown in for good measure, I opened the boot this morning to find a 0.5cm deep puddle below what looks like some sort of air vent.

As far as possible I've checked everywhere above the area and can find no sign of where water is getting in. It's not coming from the light seal and it's not coming from the waist trim fasteners. I also managed to squeeze my hand into the holes in the horizontal metal panel in which the boot courtesy light is housed to feel round the window clips and it's dry in there as well, which pretty much rules out the rear window as the culprit.

Other than the air vent being the issue (although I really can't see how it's possible for water to reach it) I've no idea where the leak might be. Any pointers on what else to check will be much appreciated.

Thanks

Andrew

stevestrat · 22nd January 2018, 15:31

The boot vents are known leak spots. Have a read at this

COLVERT · 22nd January 2018, 19:17

Do you park on a slope ? If you do it will give a clue as to the direction of the leak. Sort of trace it upstream.

The leak in my boot was from the centre of the rear screen surround.

It ran from left to right and the water ended up where you have those tissues in your pic.

solarsailor · 22nd January 2018, 20:22

Quote:

Originally Posted by stevestrat

The boot vents are known leak spots. Have a read at this

Great stuff, much obliged for the link. Think I'll try the watering can test shown in one of the pictures to make absolutely sure it's the vent before I take the bumper off though.

Quote:

Originally Posted by COLVERT

Do you park on a slope ? If you do it will give a clue as to the direction of the leak. Sort of trace it upstream.

The leak in my boot was from the centre of the rear screen surround.

It ran from left to right and the water ended up where you have those tissues in your pic.

It's parked on a flat surface. Given that the rest of the boot is bone dry and there's no evidence of water having run to the affected area from somewhere else then I suspect stevestrat has nailed it with his post - but thanks for your suggestion all the same.

22nd January 2018, 15:25	#1
solarsailor Posted a thing or two 75 Saloon 1.8T Club SE Join Date: Jun 2016 Location: Colchester Posts: 1,225 Thanks: 87 Thanked 653 Times in 344 Posts	Help Tracing A Leak In my original post on the subject (https://the75andztclub.co.uk/forum/s...d.php?t=277968) I stated that I'd taped over a split in the rear window seal which I assumed was allowing water into the boot and accumulating in the area near the offside rear light, but it's now back to square one. After a weekend of persistent rain, with some snow thrown in for good measure, I opened the boot this morning to find a 0.5cm deep puddle below what looks like some sort of air vent. As far as possible I've checked everywhere above the area and can find no sign of where water is getting in. It's not coming from the light seal and it's not coming from the waist trim fasteners. I also managed to squeeze my hand into the holes in the horizontal metal panel in which the boot courtesy light is housed to feel round the window clips and it's dry in there as well, which pretty much rules out the rear window as the culprit. Other than the air vent being the issue (although I really can't see how it's possible for water to reach it) I've no idea where the leak might be. Any pointers on what else to check will be much appreciated. Thanks Andrew __________________ This vehicle was born on Wednesday June 4th 2003 @ 08:24:38 This vehicle was the 73,905th 75 to run off the production line, out of 112,381 This vehicle was the 1,862nd 75 1.8 T Club SE to be made out of 3,980 This vehicle was the 6,856th 75 in Wedgewood Blue to be made out of 7,515 Wedgewood Blue 75s

22nd January 2018, 15:31	#2
stevestrat This is my second home ZT260 #243 (resting) Join Date: May 2010 Location: Prestonpans Posts: 22,488 Thanks: 650 Thanked 4,624 Times in 3,358 Posts	The boot vents are known leak spots. Have a read at this __________________ Steve T4 Location Map

22nd January 2018, 19:17	#3
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	Do you park on a slope ? If you do it will give a clue as to the direction of the leak. Sort of trace it upstream. The leak in my boot was from the centre of the rear screen surround. It ran from left to right and the water ended up where you have those tissues in your pic.