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#16
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um... there is supposed to be a stud there, not a bolt...
it's possible that whoever put the bolt in, damaged the head... take the valve cover OFF, and clean around the area, and take a picture of what's there, also, clean the inside of the valve cover where the bolt is touching, and photograph it as well.
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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! Last edited by vstech; 10-11-2013 at 11:05 AM. |
#17
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Answer
It appears either the gasket is damaged or the valve cover is cracked.
Note: The correct stud has been replaced by a bolt. .
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ASE Master Mechanic asemastermechanic@juno.com 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 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#18
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Hmm
Quote:
.
__________________
ASE Master Mechanic asemastermechanic@juno.com 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 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ Last edited by vstech; 10-11-2013 at 11:05 AM. |
#19
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FYI
The correct STUD is designed for the nut to bottom out (stop) at the optimum gasket sealing pressure - stress.
A bolt can and typically will over stress the valve cover and gasket.. .
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ASE Master Mechanic asemastermechanic@juno.com 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 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ Last edited by whunter; 10-10-2013 at 11:17 PM. |
#20
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in this post, you clearly state you have new nuts, and noplace do you mention bolts... bolts are bad. exact length studs, with nuts LIGHTLY installed, are key here...
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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! |
#21
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Exactly. I'm not sure why everyone thought I was using bolts. Unless its the incorrect size, I have no idea why the oil is leaking at that point. I thought maybe someone might have had the same problem before.
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1981 Mercedes 300SD - 186k miles 1978 Corvette Pace Car - 21k miles 2006 Mazdaspeed 6 - 56k miles |
#22
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Quote:
are you telling me that the picture is NOT what you have on your car? can you take a picture of YOUR car, where it's leaking?
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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! |
#23
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This is my car and I promise you that there is no bolt there, it just might be hard to see because of the oil puddling around it. I'm not even sure how someone would get a bolt on there being that there are two studs that the valve cover goes onto, and then is tightened down with a washer and a NUT. I am using a nut that threads onto the stud and oil is somehow leaking through it...
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#24
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wild.
oddities of photography I suppose. anyway, did you pull it all off, and look over the valve cover?
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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! |
#25
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I believe the nut was stripped so I purchased a new one. I have not tried to pull it off yet, but I know that there is some gouging from tightening the nut down without a washer. I just don't see how that would cause the oil to seep through the top of the nut. I'm stumped...
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#26
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Umm
Quote:
.
__________________
ASE Master Mechanic asemastermechanic@juno.com 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 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#27
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If it was my car...
[flame suit on] I would probably remove and clean it all and RTV down a washer. This way the nut it still easily removable and the washer seals any cracks/gouges. My money is on a crack around the corner. It would have to be a big gouge to leak that much oil.
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$60 OM617 Blank Exhaust Flanges $110 OM606 Blank Exhaust Flanges No merc at the moment |
#28
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the design of the valve cover is that the GASKET seals the oil away from the stud passage. you need to take the valve cover off, and look at the passage the stud passes through and look for cracks. if no cracks are present INSIDE THE VALVE COVER, you need a new gasket.
oil should not be able to get to the nut... it should be sealed away by the gasket.
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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! |
#29
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If you decide that the valve cover needs to be replaced, I have one I can sell you for $30 plus shipping.
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'81 300SD |
#30
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Quote:
This is why I have been so confused during this whole thread. Nut, stud or whatever oil should not be able to get to the top of the bolt unless the gasket is broken or the valve cover is cracked.
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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors. 2003 S430 - 107K 1983 300SD - Tanoshii - mostly restored ~400K+. 1983 300SD - Good interior. Engine finally tamed ~250K. Monark Nozzle Install Video - http://tinyurl.com/ptd2tge |
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