Your PDF looks like a diagram for a 126 gasser. but item #51 is the vent check valve, and that is the area where the vent is located on the Diesels.

I just went through this on a 82 240D a few days ago, had pressure when releasing the fuel cap. removed the vent check valve and the Bell piece. bell open, but blowing through the Vent check was difficult. so reamed the little sucker with a screwdriver. blows good now, both ways.


CJ* sorry to hear about your tank imploding. If it wont expand with air, finding one in the PNP`s is impossible. they punch them full of holes. best is to look in CL or locally for someone parting out a 300D with a 21 Gallon tank.

Here are your links

What happens when a tank vent gets clogged.

Fuel Tank Vent Warning

Charlie

__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works