Author Topic: Fuel assembly help  (Read 128 times)

hamidagha

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Fuel assembly help
« on: 11 September 2020, 08:24 AM »
Hi everyone
My 79 280 se has a new pump, filter, accumulator etc and when I put it back in I noticed a leak :)
The leak is from the connection between item 27 and the pressure line in photo attached.
I have tightened the connection as much as I can, but no joy!
What is the best solution? What is this pressure valve (27) as I do not seem to able to order replacement as I think it's jammed solid.
Any suggestions appreciated.
Thanks

daantjie

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Re: Fuel assembly help
« Reply #1 on: 11 September 2020, 08:35 AM »
I am guessing you are using new crush washers?  I have found that sometimes using aluminium vs copper or vise versa does the trick, but regardless you have to use new ones on both sides of the banjo fittings.
I cannot help on valve "27" have not seen this before.
Daniel
1977 450 SEL 6.9 - Astralsilber

hamidagha

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Re: Fuel assembly help
« Reply #2 on: 11 September 2020, 08:46 AM »
I am guessing you are using new crush washers?  I have found that sometimes using aluminium vs copper or vise versa does the trick, but regardless you have to use new ones on both sides of the banjo fittings.
I cannot help on valve "27" have not seen this before.
I did and no joy! I fear I will have to get a new set of metal pipe lines.
What is worse, while tightening 27 (whatever it is) it crumbled :( Now I need to find a solution to that too.

raueda1

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Re: Fuel assembly help
« Reply #3 on: 11 September 2020, 01:59 PM »
The compression hardens copper washers.  However, they can be reused IF you anneal them.  Hang it on a thin wire and heat it till cherry-red using a propane torch, gas stove burner, etc.  Then plunge into a bowl of water.  Good to go!  This is pointless, of course, if the washer isn't in pretty good shape to begin with.  Running it over a flat file before heating can help recondition.
-Dave
Now:  '76 6.9 Euro
Before that:  1966 230S, 1964 220SE coupe, 1977 Carrera 3.0

Randys01

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Re: Fuel assembly help
« Reply #4 on: 11 September 2020, 08:54 PM »
That regulator gizmo is not depicted in any w/shop diagram I have or seen. I have examined early 6.9..late 450....set up. I have recently worked on a KE. not there either!?
If it's now fallen to bits you might as well by pass it.