Quote:
Originally Posted by BrianR
Fuel pumps in the tank are a bad idea because the fuel can turn into Jell-O in very cold weather, damaging the pump. Also, it's hard to access since the entry is on top of the tank, requiring the tank to be removed and the fuel drained into two 55 gallon drums.
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You don't remove fuel to access or replace a pump. Replaced is standard and easy. Pump is mounted in a hole at the top of the tank. It hangs down inside the tank with a large filter on its inlet.
If diesel is jello (so that a pump at 60 PSI cannot push it), then an engine mounted pump with no more than 14 PSI sucking power could not work. If a 14 PSI pump can work, then a tank mounted pump at 60 PSI would have no problems.
I understand why a truck may not want pressurized fuel pipes since a 60 PSI leak would spray fuel. Pumps using suction would only suck in air. But pumps inside fuel tanks with more flammable materials (ie gasoline) have been standard for generations without leaks. Done to eliminate air bubbles and other problems. I still don't grasp why a pump is still mounted on the engine. That pump was moved into the tank long ago for other vehicles, airplanes, etc.
Far more confusing - why would air in diesel lines confuse any trained junior mechanic?
If that is what today’s genetically engineered labrats look like, I’m getting a truck - that does not require a junior mechanic.