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Old 01-02-2008, 11:35 AM
TTCummins's Avatar
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Join Date: Dec 2006
Location: Ypsilanti, Michigan
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Post Fuel heater mystery resolved.

When I saw my fuel heater was disconnected on my car I made the assumption that it was a two flow heat exchanger i.e. fuel side and coolant side. WRONG!!!! After disassembling it to clean every thing I now see that the actual heat exchanging portion is the coolant manifold up at the engine, and the heater is actually kinda a mixing/preheating chamber. The fuel comes into the plastic end and out the first port on the top side to the coolant manifold. From there it comes back down to the mixing/preheating chamber and then out to the engine. The hot side returning from the engine preheats the incoming fuel and since there is no real seal on that brass piston it can also mix some. I just figured I would share my revalation with the rest of you if anyone else is trying to restore their car. I believe mine was disconnected by the previous owner because the o-ring on the end had taken a thermal set to the aluminum casting and allowed fuel to leak out around the plastic end cap.

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2003 Dodge Ram 2500 Cummins - Georend fully built trans, Banks Big Hoss Bundle, Smarty Tuner, 5" turbo back exhaust. 500 HP and 1100 ft/lbs to the ground.
1979 Mercedes-Benz 300CD - Lost to a four car pile up on 275, Thank You Michigan Drivers.
1986 Mercedes-Benz 300D - Sold, Euro non-turbo car.
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Old 01-02-2008, 12:43 PM
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Location: Cinti.
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I noticed you are located in Ypsilanti. You wouldn't know any of the Besola's would you? It's my understaning everyone know everyone up there.

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