My '87 300TD has developed fuel leaks where the injector lines leave the IP. Acts as if it is losing (looks betterer than looses ) prime and that makes sense to me. My book doesn't indicate if there are o'rings I need to replace or not. Still searching yet advice would be welcome . . .
Steve

__________________
Steve
'87 300TD - 132K - Soon 4-Sale
'84 300D Turbo - 122K - Driving
'77 VW Type II - 77K - Restored
'08 250EX Ninja
English Bulldog (Brier) - My best friend. Passed away 12/02/04 while in my arms.

nice to see you back here Steve. Those connections are just flare fittings. I would take them off, make sure they don't have a bit of crud in there, and then add just a little anti-sieze. Should tighten up fine and stop leaking without buying anything.

__________________
'82 300SD - 361K mi - "Blue"

"Good judgement comes from experience. Experience comes from bad judgement."

listen, look, .........and duck.

I'll bet your delivery valve seals are leaking. Do a search on "delivery valve seals" and that will tell you EXACTLY how to do it. I say exactly because there are a couple little things that MUST be done to insure no further leaking. You'll have to buy 6 rubber o-rings and 6 copper o-rings. I have 6 copper ones you can have for let's say $5 shipped. I ordered them at the MB dealer but I wanted to do it that day so I went to an indie an bought some to use on my car. The bag is still sealed so all you would need now would be the rubbr ones and try to find a member here who will rent you his special socket for removing the valves.

Thanks
David

__________________
_____________________________________________

2000 Honda Accord V6 137k miles

1972 300SEL 4.5 98k miles

_____________________________________________

Where is it leaking at, out the nut or out the top of the IP? Top of the IP would be delivery valve seals. If it is leaking out the nut, then the line could be broken right at the flare. One of mine broke right at the flare on the injector end. If it is the line broken, a 3/16" brass compression sleeve will seal it temporarily. Drove mine ~500 miles home like that and it worked just fine.

__________________
Keep everything as simple as possible-but no simpler--Albert Einstein

Top of the IP wet with fuel but lines dry? IP looses prime?

The 0-rings that seal the low pressure feed chamber have gone bad. Remove the injection lines completely, then unscrew the pressure valve holder (where the lines attach) one at a time and then replace the 0-rings. Torque the pressure valves to 25 ft/lbs, loosen, tighten to 25 ft/lbs, loosen, tighten to 30 ft/lbs. Watch for the spring that sits on top of the actual little valve in there, make sure it's where it belongs and is CLEAN if it comes out with the holder. You may also need to replace the copper seals (on top on later pumps, sometimes under the steel valve body inside the holder on older ones) if you have a dead cylinder after replacing the o-rings.

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!

Top of the morning all. Thanks for the quick responses and I am about to go back to read them . . .

I did notice the question regarding the exact location of the leaks . . . top side of the IP, primarily three front injector lines, with upward seeping from the parts that the lines attach to. That is, the pieces (I need to find the name of those parts) that are actually held into the IP by the retainer plates. Each plate serves to retain two pieces and thereby two injection lines. Okay, now time for me to go back and read the details of your replies.

Pete,
Great to be back . . . time to move forward with my list of MB projects. I am supposed to be looking at a barn stored vintage in the next few days. They don't even know what model/year it is but say it is a diesel and the first $750 takes it. At least worth looking at since it is less than forty minutes away.
Steve

__________________
Steve
'87 300TD - 132K - Soon 4-Sale
'84 300D Turbo - 122K - Driving
'77 VW Type II - 77K - Restored
'08 250EX Ninja
English Bulldog (Brier) - My best friend. Passed away 12/02/04 while in my arms.

Delivery valve seals would be the culprit. The leaking is at the base of these valves and disperses over the tops of the retainer plates. I'll search for the R&R method.

David,
I'll take you up on the copper washers/o'rings if they are the same ones my '87 300TD 603 needs. I have some roof lube I'll send you also if you could use that . . .

I'll have to learn more about the tool to see if I should just buy one to have on hand or not . . .

Thanks ALL
Steve

__________________
Steve
'87 300TD - 132K - Soon 4-Sale
'84 300D Turbo - 122K - Driving
'77 VW Type II - 77K - Restored
'08 250EX Ninja
English Bulldog (Brier) - My best friend. Passed away 12/02/04 while in my arms.