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Diesel heater fuel pickup

Posted: Thu Nov 21, 2019 10:20 pm
by Avittery
So I bought a diesel air heater for my L400 and wondering about plumbing it into the vehicle’s existing fuel tank.
It comes with a small fuel pickup (see photo) that I would put in the bottom of my fuel tank, but I’m wondering if it create too much vacuum inside the fuel tank since I won’t be running the vehicle’s engine when using the diesel heater.

Is the gas cap or tank vented on these vans???