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#1
03-26-2009, 06:13 PM
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Lots of oil in the spark plug chamber
So we change the spark plug today and we pulled the plugs and found that spark plug number (cylinder number) 1 2 4 6 has oil covering all over i mean top and bottom drenched with oil, but here is the twist it dose not smoke meaning it dose not burn oil, but what's strange is the spark plug are not even tight they are so loose you can unscrew them with your pinky with VERY little force... Number 3 and 5 were hard to open but there were no oil...So since there is NO oil spraying on top of the piston, where is this oil comming from???
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Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN  1995 E320 SE 220k mi 1984 300SD 350k mi 
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#2
03-26-2009, 08:58 PM
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Hmmm
I am guessing this is the 1995 E320 Special Edition 202,000 miles.
Diagnosis should start with: * Replace the leaking valve cover gasket. * Replace the spark plugs, MB# 0031596703. * A cylinder leak down test. * A compression test. Checking for worn out valve guides and seals, and/or bad piston rings. Have a great day.
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ASE Master Mechanic https://whunter.carrd.co/ Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 2003 Volvo V70 https://www.boldegoist.com/
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#3
03-27-2009, 09:05 AM
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We replaced the spark plug we will check the spark plug next week to see any oil
__________________
Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN 1995 E320 SE 220k mi 1984 300SD 350k mi
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#4
03-27-2009, 10:14 AM
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They should be tighter than that, I think its like 10-15 newton meters on a M104....
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-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#5
03-27-2009, 10:37 AM
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I am guessing the spark plug was not too small to be tighten,
__________________
Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN 1995 E320 SE 220k mi 1984 300SD 350k mi
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#6
03-27-2009, 06:39 PM
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I would check the valve cover gasket.
Also, make sure the breather hole isn't plugged. I am guessing that the oil is not coming from inside the cylinder and blowing past the spark plugs. If you had that much oil going into your cylinders, you'd be having much more trouble. More likely is a bad valve cover gasket or some PCV issues or both at the same time.
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-tp 1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS 1988 560SEL "Gunther"- 190K passes anything except a gas station 1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition
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#7
03-27-2009, 07:22 PM
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How dose a bad valve gasket cause oil to go up to the spark plug chamber???
__________________
Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN 1995 E320 SE 220k mi 1984 300SD 350k mi
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#8
03-27-2009, 08:12 PM
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What motor are we talking about here?
The valve cover is higher than the spark plug holes on every engine I can think of......
__________________
-tp 1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS 1988 560SEL "Gunther"- 190K passes anything except a gas station 1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition
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#9
03-27-2009, 08:15 PM
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If this is the '95, and this is the first time you've had the center cover off of the car, is it possible that the PO was sloppy when changing oil and got it into the holes below the cover from spilling?
__________________
 Gone to the dark side - Jeff
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#10
03-28-2009, 12:06 AM
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Answer
Quote:
Leaking valve cover spark plug passage ring seals is common... Oil leaks through the ring seal area, and drools down pooling around the spark plug = if the plug is loose, every intake stroke sucks oil in. On rare occasions, I have been forced to use a ShopVac to suck out enough oil to find the spark plug.
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#11
03-28-2009, 03:02 PM
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Quote:
__________________
Gone to the dark side - Jeff
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#13
03-28-2009, 03:53 PM
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Although I appreciate the humor and message of your post Dean, I think that two out of three cars in the sig being diesels leaves us one logical alternative.
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Gone to the dark side - Jeff
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#14
03-28-2009, 04:33 PM
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Two requests for the model, both ignored. The point is you get more out of a thread if you provide some basic information, absent the detective work. A handful of keystrokes is not that hard and goes so far.
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#15
03-28-2009, 05:32 PM
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Sorry its a M104
__________________
Current Garage 2008 Mercedes GL320 CDI 188k mi Repair/Work in progress 1994 S350 160k mi Garage Queen & prepping for repairs 2005 E320 CDI 203k mi Healthy & Daily Driver 1994 S350 357k mi Retried as parts car 1984 300TD 214k mi Blown OM617 Poss OM603 Swap?? Sold 1987 300SDL 200K+ 1994 S320 181K mi 2008 E320 Bluetec 127k mi 1999 S420 130K mi 1980 240D 360k mi 15+ Others that has come, stay and gone GONE, BUT NOT FORGOTTEN 1995 E320 SE 220k mi 1984 300SD 350k mi
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