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#1
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Oil in Coolant?
My coolant appears to have oil in it. But how? There is no coolant on the dipstick, I don't seem to loose oil, no steam/white smoke from tailpipe. I am thinking I will do a flush and see what happens. Any ideas?
BTW: 1990 300E 2.6 |
#2
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Well, do a flush to ensure the leak is present, but your are looking at the least disheartening of two possibilities of a blown head gasket.
Depending on the present condition of your rubber cooling hoses, they will eventually begin to rot from the inside out and eventually burst. A hot coolant and oil mix is seemingly not good for hoses. At least with this kind of head gasket problem you can plan your next moves carefully. You can pick a good indy or collect the resources, tools, reputable machine shop to get the work done yourself. Alternatively, if the leak of the oil into the coolant is extremely slow, you may just be able to keep driving so long as you keep a close eye on contamination of the oil with coolant and that the rate is not increasing drastically. You could also decide to replace the coolant more often than usual. Just suggestions to a pricey alternative. At least, that is my opinion/suspicion...
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2006 BMW M5 "Heidi" @ 109,000 miles 2005 MBZ C55 AMG "Lorelai" @ 165,000 miles 1991 MBZ 300E "Benzachino II" @ 165,000 miles 1990 MBZ 500SL "Shoshanna" @ 118,000 miles (On the hunt for a good used M103 engine as of 6/10/23, PM me if you have one to sell!) |
#3
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Colorado220, recommend having a reputable indie evaluate the existing condition ASAP. If the tech confirms a blown head gasket then have it replaced immediately. The issue will not go away or fix itself, and it doesn't make sense to foul the cooling system components.
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Fred Hoelzle |
#4
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Head Gasket was a though I had also, however the PO just had a shop check it for what was needed before I bought it, while there is a to do list that was not on there. Also wouldn't a blown head gasket give you steam or some for of excess water out of the tailpipe?
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#5
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How long have you owned the car? I just washed out what looked to be oil from the radiator header tank. The goo was actually residue from "Water Wetter" that had been added by the PO. Ive owned the car for 6 years and never used WW.
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#6
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NO not on a 103 engine, a blown headgasket means oil in the coolant.
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Click here to see the items I have up for auction at EBay Click here to see a photo album of my '62 Sprite Project Moneypit (Now Sold) |
#7
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I second that oil in the coolant. It just happens, lets go, even when the job is done if not done right can happen again quick.
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#8
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Quote:
M103 and M104 are notorious for headgasket leaks, and that's your problem.
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Kent Christensen Albuquerque '07 GL320CDI, '10 CL550. '01 Porsche Boxster Two BMW motorcycles |
#9
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103... oil in coolant
104... oil leaks at head...
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1989 300ce 129k ( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone) 1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus 1994 e320 Cabriolet 108k 1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it [/SIGPIC] |
#10
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ditto
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David S Poole European Performance Dallas, TX 4696880422 "Fortune favors the prepared mind" 1987 Mercedes Benz 420SEL 1988 Mercedes Benz 300TE (With new evaporator) 2000 Mercedes Benz C280 http://www.w108.org/gallery/albums/A...1159.thumb.jpg |
#11
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I accept the knowledge possessed by these guys. They are absolutely tip-top. I do have one question and it is for my curiosity.
Where on the head or gasket does the oil get into the coolant? Between the cam oil feed ports and the cooling passages? I honestly want to know and I'm not trying to cast doubts. I ask because I dont know of any place above the crank journals where oil pressure exceeds the coolant pressure. The cam feed ports are the only place I can imagine the difference but I am not savvy enough to know what the actual pressure at the ports is. |
#12
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That or something similar could possibly also be my issue. The goo I have looks and feels more like soft gel or wax than oil. (M104 engine with leaky timing cover and dry everywhere else.)
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2008 E350 4matic / Black/Anthracite ------------------------------------ Gone but not Forgotten: 2001 E430 4matic, 206,xxx miles, Black/Charcoal 1995 E320, 252,xxx miles, Black/Grey 1989 260E, 223,00 miles, Black/Black |
#13
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The head gasket starts to go and oil from cylinder or oil channels that drain back down get blown into the coolant channels. Thats why the top of the block and the head should be "trued" when a gasket is changed. But thats true of any head work really.
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#14
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Never thought much about it, Mike. I believe you probably have it nailed, the galleys to the cam bearings, or maybe the timing chain tensioner, that also is high pressure off one of the main galleys. (or is is gallery? whatever.)
Gilly
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Click here to see the items I have up for auction at EBay Click here to see a photo album of my '62 Sprite Project Moneypit (Now Sold) |
#15
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Scratch that. Just went through all of my and the previous owners' service records. Last coolant flush was in mid-2003. He sold the car to me in '06, around the time the next one was due. Seven years.....
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2008 E350 4matic / Black/Anthracite ------------------------------------ Gone but not Forgotten: 2001 E430 4matic, 206,xxx miles, Black/Charcoal 1995 E320, 252,xxx miles, Black/Grey 1989 260E, 223,00 miles, Black/Black |
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