300e: Leak at Fuel Pump

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Chip L - 23 Oct 2006 15:22 GMT

92 300TE, 140k,

This car has been sitting for over a year. As I cranked the car
yesterday, fuel is leaking at the rear fuel pump at the 'fuel line to
engine' brass connector. Tightening the brass fitting did not stop
the leak. Thoughts appreciated.

Chip L

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Tiger - 23 Oct 2006 15:57 GMT

You have to disconnect it... dry the ftting a bit... and apply aviation form
a gasket at the contact spot.

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Chip L - 23 Oct 2006 17:26 GMT

I really appreciate the advice, Tiger. Is that product available at
auto shops? If not, where can I get it...

Chip

> You have to disconnect it... dry the ftting a bit... and apply aviation form
> a gasket at the contact spot.

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Tiger - 24 Oct 2006 00:34 GMT

Yes, available at pretty much all auto parts stores. If there are copper
washers, get new ones at the dealer... you are going to need quite a bit as
you do have to disassemble the fuel filter too... they are all on the common
rail

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Roland Franzius - 23 Oct 2006 18:12 GMT

Tiger schrieb:

> You have to disconnect it... dry the ftting a bit... and apply aviation form
> a gasket at the contact spot.

Think of your fire insurance. Its a high pressure line. Better get new
original gaskets and let the MB station fix it. Doing yourself you dont
get a leak-proof connection with these hollow screws without experience
and good tools.

A second danger is getting dirt into the fuel line.

Signature

Roland Franzius

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