So in the trunk of my car I found a glowplug with a missing tip. I am starting to wonder if this is the clacking sound that I am hearing and possibly related to unburnt fuel smoke on cold startup. Recently I also pulled #4 and #5 injectors to find the atomizing balls missing/

From the diagrams it looks like the prechambers have bottom with some small holes for fuel dispersion? Or does it just empty straight into the piston? Any suggestions on how to find and retrieve these without pulling the head?

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1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

You could remove the glow plugs, then the pre-chambers and get some nice access to the combustion chamber. The PC's require a special slide hammer to remove.

__________________
Adam Lumsden
(83) 300D
Vice-President of the MBCA International Stars Section

I do not know if this would work, but you could pull the injectors and the PC's, get out the shop vac and rig up a small suction nozzle out of clear flex line that fits through the hole and use that to suck out the cylinders.

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D

But are the bottoms of the PC's solid or open ended?

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#1995 E320 Touring
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Looks like small holes to me:
http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1Y70MFKNH22J0UIDVT&year=1983&make=MB&model=300-DT-001&category=D&part=Diesel+Prechamber

You need to pull them out anyway.Not just the broken ones either, all of them. Then I would imagine it would be easy to rig something up to vacuum out the cylinders.

Danny

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"Lost glow plug tip and balls?" I thought you were talking about your anatomy at first.

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" We have nothing to fear but the main stream media itself . . . ."- Adapted from Franklin D Roosevelt for the 21st century

OBK #55

1998 Lincoln Continental - Sold
Max 1984 300TD 285,000 miles - Sold
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Dude, he wouldnt be talkin'.....

Maybe in a different tone...

Pull and replace all PC? Why? Honestly until I can find the source of this knock and fix the unburnt fuel issue at startup I can't justify the $60+ cost per PC.

__________________
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1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

Here's a pic of the bottom in this post:

http://www.peachparts.com/shopforum/showpost.php?p=1484395&postcount=10

was it the old style loop glow plug or the new style 'pencil' that lost its tip?

__________________
Cheers,
Robert

85 federal sorry. pencil.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

The one on the right has 2 holes?

__________________
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1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

You said you lost the balls from the prechamber didn't you?? Your just going to run the engine like that??
You don't think this is the source of your knock??

If you lost them in 2 chambers do you think the rest are in good shape?
Like I said, you need to replace them all.

danny

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1984 300SD Turbo Diesel 150,000 miles

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Those balls only serve to atomize the fuel spray providing better combustion and economy. You really think it will make that much of a difference? This knock is not related to injectors afaik as I have cracked each without isolating it. It gets less noticable as the car is warm. I did fix one cold knock by replacing #5 injector. I looked down in the PC and did not see the balls. From the looks of the nubs the balls were literally eaten away. $60 a pop is pretty pricey for a car i paid $500 and a knock I haven't been able to diagnose. I supposed I could start working pull a part over for PC's, some junkyard dog always comes and pulls all the injectors so atleast most of the work is done . Anyproblems with using used PC's? They would get a good cleaning obviously.

__________________
http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42