Thread: Leaking Diesel

A number of possibilities.

A common problem is one of the flexible lines doesn't have very much slack and engine movement causes eventual failure of the line or one of the connections. Replace with a new line and make it a little longer so it won't do the same when you are far from anywhere.

Another is fittings on the lift pump.

Another is seals on the injection pump - usually at the spindle for the accelerator lever.

Another, potential problem can occur if you ran out of fuel and decide to prime the system using the manual priming lever on the lift pump. The rubber diaphragm in the lift pump can fail when the manual lever is used (because the aged rubber is flexed further by the hand lever). This can lead to diesel contaminating the engine oil and excessive engine wear.

Normally the fuel injection system in a 300tdi will self prime in a short time.

Thanks guys!

Turns out once i got the bonnet open it was incredibly obvious!!! one of the fuel return lines has perished, was a simple walk to the shed cut a new one fit it and put more in the glove box ready for when the others decide to go

And yes the 300 primmed itself so no dramas there

Thanks again,


James.

why don't you just change them all if you have the stuff sat at home?

seems silly to wait for them to fail if they are that old......if you change them they are not likely to fail with the years left in the car