Quote:
Originally Posted by Texasgeezer
... does anyone know what the small metal cylinder is on the return diesel flow line? ...
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Unlikely, since you didn't describe your vehicle. In this situation, a wag on a Dodge forum always assumes "1930 Fordson Tractor?".
I used Gates Barricade fuel hose on one of my 300D's (1984 or 85, forget) at the lift pump. I also forget if 1/4" or 5/16" ID. I bought at NAPA (per foot). It is stamped "rated for bio-diesel", so if it survives that, regular diesel is no problem. One guy here used PEX plastic pipe, which is impervious to almost anything. Sold for water pipe at Home Depot, but is quite stiff and needs special ring crimps. Might also look a bit funny on a diesel engine.