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#1
05-11-2007, 09:41 AM
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Request recommendation for Valve Cover sealant (85 300D)
#%&^*&! I had a dripless Mercedes until I noticed recently that i was dripping oil from a valve cover seal. I tightened it and the leak went away, but I suspect its still problematic. I can't fin HYLOMAR anymore. Can anyone recommend a new sealent.
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#2
05-11-2007, 09:46 AM
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Permatex makes a black gooey always tacky, non-hardening sealer similar to Hylomar (but not as pretty) that seems to work well. That's my preference over RTV on most things. Particularly where a gob of something might break off and ...well....
 Rick
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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??) Last edited by rs899; 05-11-2007 at 10:12 AM.
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#3
05-11-2007, 09:48 AM
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Clomp!!!!
This is the post that told me the tip on how to properly seat the valve cover (no oil and dry!!!)...
http://www.peachparts.com/shopforum/showthread.php?t=91709&highlight=clomp goes on dry and CLOMP!!!  ever since I've used this technique (three valve adjustments later - no leaks!
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~shell As of 2/2010: 2001 CLK55 0o\=*=/o0 13.6 @ 106mph 10K mi 1984 300SD 260K mi and going and going... 97 S600 46K miles 1991 Sentra SE-R (extremely dorked with) www.se-r.net
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#4
05-11-2007, 09:49 AM
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With a new gasket and all four nuts tightened equally to 11 ft.-lb..........there won't be any "problematic" unless the valve cover is not flat..........due to excessive torque by a previous owner.........of course.
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#5
05-11-2007, 11:29 AM
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Homemade Torque Wrench
Quote:
I have slightly modified the rule for observing Torque wrench specifications. My personal belief is thatthey are to ensure that you dont undertorque a nut or bolt. Therefore to be consistent with this philosophy, I always take the torque spec and multiply it by a slight factor based on the criticality of solving the problem at hand. Hence to solve the leaking gasket for 11 ft- pounds, I lean my entire body into it and then nudge it 3 more times. For 30 foot pounds, I use a piece of pipe and a breaker bar. For 60 foot pounds, I also use a 20 pound mallet. For 100 ft pounds, I try to use the starter motor or some jury rigged device involving putting the car into gear.
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#6
05-11-2007, 11:31 AM
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um, the weight of your body could easily snap off the v/c bolt.
John
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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 560SL convertible 1987 190D 2.5-5SPEED!!!  1987 300TD 2005 Dodge Sprinter 2500 158"WB 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#7
05-11-2007, 01:41 PM
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Quote:
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#8
05-11-2007, 04:31 PM
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Inside Valve Cover.....
There is a thread around here somewhere.....talks about this problem, and filing the little feet (sort of) or maybe a better word would be "gasket squish preventers".....generally these are distorted due to a past overtorque incident......if you file them a tad you will regain the squish factor that MB intended......
SB
__________________
 Diesels: '85 300D, "Max, Blue Benz", 155K, 27.0 MPG '84 190D 2.2, "Eva, Brown Benz", 142K, 40.2 MPG '77 240D (parts car) '67 Eicher ES 202 Tractor "Otto" (2cyl, Air Cooled, 30HP) Gassers: '94 Ford F-150, "Henry", 170K (300 Six) 17.5 MPG '85 190E 2.3, 148K....Parts Car '58 Dodge W300M Powerwagon (Flat Fenders) Less than 10 MPG
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