300D secondary fuel filter leak

[GB_300D]

I have a leak on my 1978 300D that I can't seen to get rid of.

It leaks between the secondary filter banjo bolt and the
crush ring. I took off the old aluminum crush ring and replaced
it with a copper one (after many auto stores later). Also, the o ring
was replaced with a new one.

I tighten it down pretty tight and it still leaks!
If I tighten it down any more I'm afraid that I will
fracture the aluminum fuel housing.

Any suggestions? Specs on o ring and crush rings
would be helpful.

thanks

[charmalu]

Are you talking about the banjo bolt that has the three way fitting. the return line from the injectors and the cigar hose & the line coming up from the injection pump?
I just went out and looked at mine, and there is an aluminium washer between the bolt and banjo fitting, and under the banjo fitting and the filter housing.
I just replaced that line and alum. washers. no leaks. shouldn`t have to really crank down hard on it, the housing is aluminium. maybe a PO in the past did somehard wrenching on it.

Charlie

[GB_300D]

Sorry, Not the banjo bolt.

The holow bolt that holds the secondary filter
on. I put the copper washer between the head of that bolt and the
secondary filter housing and tightened it down.

Very tight but it still leaks.

Maybe I should order the correct aluminum washer
and O ring?

[toomany MBZ]

That should have worked. Try and make sure you have the correct size washer. On my '82 240, I had the same thing, I was unable to find a copper washer, so I went to the hardware store and bought a composite washer of the proper thickness and I.D.

[GB_300D]

Got the correct o ring/ crush washer from **************.com

and no more leak.

It cost 1.50 for 1 crush ring / o ring package.

It pays to get the right part.

[toomany MBZ]

Here's a pic of one from **************. Neither of my current fleet needs it.