VW T25 Transporter JX TD coolant reservoir

[JohnnyD]

Hi, I'm looking for a used VW T25 JX TD coolant reservoir, part no. 025121407. Any ideas where I might pick one up? Thanks, John D.

 

[Tim]

https://www.car-parts.ie/car-parts/vw/transporter-iii-bus/1-6-37-kw/expansion-tank-engine-coolant/1772

 

[JohnnyD]

Hi Tim, thanks for the link. I have tried a couple of the new tanks and they don't seem to handle the pressure. One of them actually ballooned. The original seems to have metal supports. I'm hoping to find someone who has spares and are willing to sell one on. Thanks, John D.

 

[Tim]

I would have thought that the pressure relief cap on the bottle should prevent ballooning of the bottle. Are you sure that the system is entirely free of air.

 

[JohnnyD]

I do have

 

[JohnnyD]

There is air in the system and I can't find out why. The old tank developed a hole at the top so I bought one of these new ones. Bled the system but still air seems to get in. I tried the pressure test 15psi and couldn't see any leaks. I tried the head gasket test with the blue fluid. No change in colour. No white smoke and no milk on the oil stick. The new tank with blue cap ballooned so I bought another with blue cap for a petrol engine by mistake. The third seems to struggle with the stress and heat. The coolant will flow in to the overflow tank but will not return to the expansion. I now have 4 caps, my original black cap and 3 new blue. I've tried them all and still no change. I also replaced the old overflow pipe. I had to replace the coolant tank about 10 years ago with another old type and had no issues then so that's what has me thinking to try with another old one. I've heard that air could get in through worn threads on the bleed screw when opening? There seems to be bubbles every few seconds when bleeding.