VW T4 Leaking Windscreen Borescope Inspection Using DEPSTECH DS520  

There is more than one leak. In this video I show the water is coming in where the A pillar joins the roof 2:15 and also where there is some separation behind the weather strip 2:24. After showing the water coming in I then show where those areas relate to on the exterior of the van. As a temporary fix I have used black duct tape around the edge of the windscreen and Dirko grey sealant in the crack behind the weather strip. The van is now dry. The windscreen is also leaking along the bottom of the frame and no doubt in a few other places as well. The purpose of this video was to show leaks in places that might not be so obvious and also to demonstrate the borescope.

Hello mate I have been chasing a leak recently on the drivers side I have a video showing it and I've had the screen done the apature was absolutely perfect I was driving home from the window place and no rain but water must have been still in the a pillar because I could see it leaking I recon somewhere in these areas are my problems thanks for the video its gave me some inspiration on my next video ill be looking to quote this video for others to watch ? Cheers dave

​@scousebikers Hi Dave. Thanks for watching. When I filmed the video I forgot to show inside the bottom of the A pillar. A centimetre or two below where the water is leaking out, where I removed the plastic tab, there is some kind of foam. It is kind of like expanding foam. Water can well up and sit on top of it for weeks. The area where the top of the A pillar joins the roof and the crack/separation behind the weather strip, is, in my opinion, a major weak spot on T4s. I think it affects more vans than people realise. It has caused the passenger side step under the plastic cover to rot on my van. Probably the cause on many other vans too. I have left the rubber floor covering out of the van until I get the leak sorted properly. Rusty water leaked out the back of the matt (van always parked facing uphill) and into the plywood floor in the back and up into my new vinyl oak effect effect flooring, that it now ruined. Water leaks are the absolute worst, but it is all fixable. For the time being duct tape and Dirko grey sealant has got the van water tight. It's not pretty, but it is dry. 😂 Hope you get yours sorted and that my vid helped you diagnosed the leak. Without seeing that second dribble of water with the borescope I never would have looked behind the rubber weather strip. Cost me £100, and even if I never use it again, it was money well spent. All the best Marc

@T4TipsGuides Marc that's correct mate that's exactly what's happened to mine on the drivers side the the lip for the door seal has gone with the wind 😅 I have now sealed in the locations you mentioned with heavy silcone sealant I'll add a video soon go the channel to shoe a temp solution just got to wait to see what happens after the rain I agree with what your saying these vans are classics in the making I've had her about 3 years now great vans same problem with the water travelling down the van destroyed my wood hopefully fix it temp for now and get some seal sealer on her soon and repaint cheers dave

​@scousebikers ​I'll make a short video tomorrow to show where I applied the sealant. It isn't pretty, but the van is dry.