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  #1  
Old 07-18-2010, 12:48 AM
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Join Date: Dec 2009
Location: Sydney Australia
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Leaking Fuel Pump Fitting

Heeelp. I just replaced both fuel pumps on my 1989 300TE with Meyle pumps and the front pump (where the filter and accumulator live) continually leaks. I have pulled it out 5 times now and used new copper washers but the freaking thing still leaks. What gives? It seems fine just after i do the job and take the car for a run, no leaks but when i go back to the car the next morning it has been leaking. It is driving me nuts. Any clues on what i can do here?

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  #2  
Old 07-18-2010, 01:30 PM
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if the fuel pump itself is leaking,it could be many things,please elavorate where the leak is located,you mentioned somethin about the fuel filter and accumulator,where is the exact leak?
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  #3  
Old 07-18-2010, 02:08 PM
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Location: Utrecht, the Netherlands
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Always put a little bit of grease on rings an compression fittings.
They will seat with much less force.

Rob
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  #4  
Old 07-18-2010, 05:10 PM
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There was a problem with leaking pumps from Meyle had to change one three times.
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The most complex systems can fail in the simplest way.
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  #5  
Old 07-18-2010, 06:09 PM
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it appears to be from the crush washers on the banjo fitting or the one on the pump under the non-return valve.
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  #6  
Old 07-19-2010, 09:31 AM
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If you are using new, correct copper sealing rings I would inspect the sealing nut and check valve assembly for galling. Mark
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  #7  
Old 07-23-2010, 08:02 AM
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yup brand new washers etc. Had it perfectly sealed again last night, went for a 30 min drive no leaks. Got up in the morning started the car and fuel leaked out everywhere. I am going nuts trying to figure this out.
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  #8  
Old 07-23-2010, 10:16 AM
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Location: Greater Metropolitan Beaverdam VA
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Banjo fitting

When driving, you may be using fuel faster than the leak so it will not be evident.

Look for a cracked banjo fitting. Can be the result of overzealous tightening.

If not cracked look for scoring on fitting faces and on face of banjo bolt.

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