1981 300SD

Can someone help me locate the
"The Fuel Pressure/Over Flow Valve that controls fuel supply pressure to the Fuel Injection Pump Housing " on my '81 300SD.

Describe where or if anyone had a pic with one of those arrows .....

Want to remove this and clean it...

Thanks
AA


.....

__________________
'87 924S
'81 280SEL

Sold ->

81 300SD -
93 300E w/ 3.2
85 300D-
79 300SD
82 300CD
83 300CD - CA
87 190E 5 spd
87 Porsche 924S

"..I'll take a simple "C" to "G" and feel brand new about it..."

It's on the IP facing the block by the temp sensor on a return banjo fitting. 17 mm. Spring is weakened over the years. Stretching it to increase pressure works temporarily.

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

If that's what I think it is, follow the hard plastic line located on top of the fuel filter head, the return three way item.

One line is from the injector return line, one to the cigar hose and that plastic line from the banjo bolt.

On the other end, at the IP is another banjo bolt, inside that is a spring and a ball bearing.
http://www.peachparts.com/shopforum/showthread.php?t=286637

The FSM pdf is in the above link, post 5.

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83 SD

84 CD

On top of your Fuel Filter is a Banjo that has 3 hoses connected to it. One hose is the Injector Fuel Return line, the other is a straight Hose that goes down to the Rear of the Fuel Injection Pump Housing (on the side of the Fuel Injection Pump closest to the Engine), the other hose is the Cigar Hose that takes the return Fuel Back to the tank.

Simply trace the straight hose down to the back of the Fuel Injection Pump and loosen what appears to be the Banjo Bolt (but it is the Pressure Relief/Over Flow Valve) and remove it if you want to. There will be 2 Aluminum or Copper Crush washers that seal the area.

In the pic the Red Arrow points to where the Pressure Relief/Over Flow Valve would go.

Attached Thumbnails

 

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84 300D, 82 Volvo 244Gl Diesel

See pics....Is this what I'm supposed to clean?

It looks clean as a whistle....
AA


...

Attached Thumbnails

     

__________________
'87 924S
'81 280SEL

Sold ->

81 300SD -
93 300E w/ 3.2
85 300D-
79 300SD
82 300CD
83 300CD - CA
87 190E 5 spd
87 Porsche 924S

"..I'll take a simple "C" to "G" and feel brand new about it..."

I do not know if that was the bolt to clean but I did spray it out with brake parts cleaner and reinstall....SD started up - stalled .........then on 2nd try started up .........and with "Italian tune up"...seems to be back to normal and ready for more....

Thanks,
AA

__________________
'87 924S
'81 280SEL

Sold ->

81 300SD -
93 300E w/ 3.2
85 300D-
79 300SD
82 300CD
83 300CD - CA
87 190E 5 spd
87 Porsche 924S

"..I'll take a simple "C" to "G" and feel brand new about it..."