Total bummmer. I changed out my primary fuel fiter to clean the one I had on with some acetone tonite, and when I went to prime with the pump, I saw a few drops coming from underneath the primer pump.

The pump works OK but does this mean I will need to replace the primer pump assembly?

__________________
'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..."

You can run them with a leaking primer.

But eventually, it will get you into trouble.

The new one is about $20. and it takes all of 15 minutes to install.

Why not do it??

Plus I think the updated design is nifty. Not having to unscrew the darn thing should be a heck of a lot easier. I'm not sure if mine is leaking but its a pain to unscrew, even when I don't tighten it that much.

__________________
Seth

1984 300D 225K
1985 300D Donor body
1985 300D Turbo 165K. Totaled. Donor Engine. It runs!!!
1980 300SD 311K My New Baby.
1979 BMW 633csi 62K+++? Dead odo

I use a faucet wrench, its cheap and found at any hardware store, it'l grab that fat puppy

__________________


1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

A small amount of leakage from the original pump while priming is pretty hard to avoid due to the design. You are probably OK for awhile. Maybe when it gets warm and you want to throw $20 at the car a new-design pump would be nice.

When the primer pumps really get questionable is when they throw diesel at you, kinda like Linda Blair puking in the Exorcist.

Ken300D

__________________
--------------------------
1982 300D at 351K miles
1984 300SD at 217K miles
1987 300D at 370K miles

OK I thought I was clear on this but the pump is not leaking...and BTW it is a new design black one that doesn't unscrew....It is dripping from under the assembly....I will try to post a pic next chance I get, but the drops come from the bottom of the assembly.
If it leaks from there NOT the sides of the pump; Is it still the pump or the assembly???

__________________
'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..."

Is there a copper washer under the new primer pump? I notice they don't come with one, you have to buy it separately.

__________________
Palangi

2004 C240 Wagon 203.261 Baby Benz
2008 ML320 CDI Highway Cruiser
2006 Toyota Prius, Saving the Planet @ 48 mpg
2000 F-150, Destroying the Planet @ 20 mpg



TRUMP .......... WHITEHOUSE
HILLARY .........JAILHOUSE
BERNIE .......... NUTHOUSE
0BAMA .......... OUTHOUSE

Mine's been leaking like a sum***** since I've had the car (3 years). Makes a mess when doing fuel filters but in the mornings it purrs to life after one barely audible crank.

__________________
1985 CA 300D Turbo , 213K mi

Have you tried a crush washer?

__________________


1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

I presume that the drops are fuel. If not, there may be a leak from the IP where the fuel pump bolts in, or (in my case) some IPs have a side plate which has a neoprene gasket which can be a PITA to fit correctly and then leaks where it is not aligned.

If it is fuel, wipe down the fuel pump and pump a couple of times to see where the fuel is coming from, the outlet pipe or the primer pump where it screws into the fuel pump.
A copper or aluminum crush washer should be fitted where the primer pump fits, the outlet pipe may be leaking from the valve body? Loosen the pipe and tighten the valve body, retighten the pipe and check again.

__________________
Tony from West Oz.
Fatmobile 3 84 300D 295kkm Silver grey/Blue int. 2 tank WVO - Recipient of TurboDesel engine.
Josephine '82 300D 390kkm White/Palamino int.
Elizabeth '81 280E, sporting a '79 300D engine.
Lucille '87 W124 300D non-turbo 6 cylinder OM603, Pearl Grey with light grey interior


Various parts cars including 280E, 230C & 300D in various states of disassembly.

Can someone give the Bosch part number for the primer pump off your box you put in a 300D?

I would like to try and pick one up at Napa this weekend.

Thanks

__________________
85 300D Turbo