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Old 07-01-2001, 12:49 PM
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Join Date: Jul 2001
Location: PA
Posts: 90
I have black oily sludge floating in my coolant liquid resevoir.The vehicle is a 1986 300TD diesel station wagon.

Thank you Derick
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Old 07-01-2001, 03:33 PM
jbaj007's Avatar
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Join Date: Jun 2001
Location: Santa Monica, CA
Posts: 2,053
Odds are.......head gasket.
The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)
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Old 07-01-2001, 03:42 PM
David C Klasse's Avatar
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Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
Posts: 2,352
Sounds like your head gasket. And if you have oil in your coolant, then you have coolant in your oil. Do a search on the subject, you find quite a bit of info on the matter.
2006 E350 w/ 155k miles (Daily Driver)

1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
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Old 07-01-2001, 05:20 PM
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Join Date: Jan 2000
Location: New Bedford, MA USA
Posts: 1,583
Change the oil, while it's draining, see what comes out. Usually as a rule the oiling system runs higher mean pressures than the cooling system. So, oil in the coolant is more frequently seen. Drain and flush the cooling system, use a mild detergent. Benzmac suggested "Shout" to me a while back. Have your compression checked. See if it recurs. Also, if diagnosis remains obscure, have the trans cooler tank in the radiator pressure tested. They can leak.
Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.
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