Fuel tank sender vapours in boot

[dc7531]

Originally Posted by Modena

there is of course two flanges, one notched that goes inside the tank, and one for the top of the tank, the notched one inside should have a gasket too.

I had a chance today to clean up and remove the sender and found nothing out of the ordinary according to this VDO diagram I found on the web. The sender had 1 neoprene gasket between the top sender flange and the top of the tank (nothing on the underside between the tank and the bottom flange) along with small red fibre washers and spring washers for the 6 screws. I will replace all of the gaskets but will also try adding another neoprene gasket above the bottom flange as suggested above. Hopefully, with some carefully placed Hylomar and Stag, the problem will be fixed. Any further suggestions?

Derek