Pagoda SL Group
W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: ChrisZeiss on May 25, 2018, 19:20:39
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When one replaces the fuel filter there will be air in the filter housing - How does one expel that air and prime the system so it's full of fuel - and no air ?
Simply prime by letting the fuel pump run (before cranking the engine) - and then crank the engine (and fuel injection pump) until the air is out of the system ? Or is there a better way ?
Thanks for any advice.
Chris Zeiss
Edmonton, Alberta
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I would let the pump run for about a minute without cranking the engine to purge the fuel filter housing and fuel return circuit of air. Then switch off and start the engine normally. There might possibly be a few bubbles in the line between the filter housing and the injection pump, but not enough air to cause more than a momentary miss or two after the engine fires up.
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Not sure if you need to or not but there is a bleed bolt on the top of the filter mount that you can crack open with the pump on until fuel runs out. I’ve done it.
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Thanks for the tips, Gentlemen !
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When I changed mine I just started the car normally. It doesn't take long to get the fuel flowing.
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Thanks gents !
I guess I was a bit too worried - just by priming (i.e. switching on the ignition to set the fuel pump running, but not cranking the engine) the filter housing was filled very quickly (within less than a minute) - and the engine started immediately - as y'all indicated.
Dankeschoen !
C. Zeiss
Edmonton, Alberta