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#1
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91 300D leaking oil everywhere...
well, it's bad...
turbo outlet dripping, intake crossover dripping, EGR that's plugged, dripping... engine running rough, head gasket to timing cover dripping... I'm worried about this poor car. it was doing SO well last summer, customer drives it off and on through the winter, and now it needs help. I do not think it's turbo seals, it does not use much oil, I think it's all blowby. (why did MB get rid of the oil sep can?) what's the general forum think of as a first step?
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#2
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A quick trip to the local self car wash with a gallon of 'Mean Green'
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1985 300D 198K sold 1982 300D 202K 1989 300E 125K 1992 940T "If you dont have time to do it safely, you dont have time to do it" "The democracy will cease to exist when you take away from those who are willing to work and give to those who would not." |
#3
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X2 on cleaning!
Then a leak down test / just put some low compressed air via the glow plug hole to listen to where the air is coming out. Listen for example at:- Oil filler cap Exhaust Air filter Dip stick tube Then look for Bubbles in the coolant
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#4
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Take oil cap off and start car to see if it is blow by.
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#5
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Quote:
You don't want to turn the crankshaft by accident
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#6
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This is one of the more frequent HG failure points I believe. Compression test for starters.
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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 |
#7
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Agreed, highly possible that it is the head gasket: #1 cyl to timing-chain cavity leak. Pull the #1 injector and crank the engine, see if any oil spits out, and look down into the prechamber for oil after cranking.
One significant risk in these engines is hydrolock. The piston actually protrudes beyond the top of the block and into the head gasket at TDC, leaving the prechamber (which protrudes down into the piston) as substantially all of the combustion chamber. This leaves 5 tiny holes to pass oil which could pool in the pre-chamber hole in the piston, during the compression stroke, so less than a teaspoonful of oil could damage your engine (theoretically even with the glow-plug out), cranking speeds might be fairly safe unless the cylinder is quite fouled with oil. Other more expensive problems would be stuck rings, not common if running diesel or good biodiesel though (I believe that you run D2?).
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Gone to the dark side - Jeff |
#8
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Interesting I did not know that.
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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 |
#9
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I'm in FL for the week, will post a couple of pictures if I have them here.
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Gone to the dark side - Jeff |
#10
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I'm sure the guy is NOT looking forward to a head replacement... ROY tells me that the 91 2.5 turbo head has been superseded with improved castings, and If it's bad, repair is unwise... replace with modern casting is best.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#11
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and if it's been hydrolocked, then I could be facing bent rod too...
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#12
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Although there is a newer casting available, the '91 had a stronger casting than the dreaded '87 castings: OM602 & OM603 Cyl. Head Revision Reference
A couple of photos. The head photo shows the flat surface with protruding prechamber, the block showing the typical piston protrusion at TDC on #1 and #6 and the prechamber pocket in the pistons.
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Gone to the dark side - Jeff |
#13
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When the weather was bad I got bored and started meauring this sort of thing on my OM617
OM617 (non turbo) cam profile specs, piston height specs etc In case you are interested (I was really bored)
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1992 W201 190E 1.8 171,000 km - Daily driver 1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone 1965 Land Rover Series 2a Station Wagon CIS recovery therapy! 1961 Volvo PV544 Bare metal rat rod-ish thing I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior Don't leave that there - I'll take it to bits! |
#14
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Obviously, I'm a newbie to this.....what are you gonna see if it's excessive blow-by? I hold my hand over the hole and it stays clean......but there is a bit of smoke/vapor coming out of it. |
#15
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Unscrew cap but do not remove with engine running if cap blows off there's alot of blow by.
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1999 w140, quit voting to old, and to old to fight, a god damned veteran |
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