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#1
09-28-2013, 01:38 AM
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black RTV silicone
Anyone ever use or know of any adverse effects with using rtv silicone on an m103 to seal the valve cover?
__________________
 1990 190E 3.0L 
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#2
09-28-2013, 12:36 PM
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Quote:
You shouldn't need rtv and I'b be worried about stray bits of rtv getting where it shouldn't. RayH
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#3
09-28-2013, 01:27 PM
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The gasket is reusable until it hardens / shrinks / crushes out. A small bit of RTV where there are internal corners / 1/2 circle cam plugs is used to prevent weeping.
If you are trying to get a gasket to go one more time, a _thin_ wipe if RTV can be used. However, expect much time consuming clean up when you put the next gasket on.
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#4
09-28-2013, 02:58 PM
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Thanks. I just have a few tubes of the silicone and my valve cover is starting to leak. I did use it to seal my thermostat housing and it worked excellent. I will just order the new gasket, I don't wanna spend a bunch of time cleaning it for the next time I need to replace it, plus I don't wanna run the risk of it breaking off and causing my engine to seize. Thanks.
__________________
1990 190E 3.0L
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#5
09-28-2013, 06:01 PM
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Answer
Quote:
Globs and spooging can come loose, endangering oil passages. .
__________________
ASE Master Mechanic https://whunter.carrd.co/ 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 2003 Volvo V70 https://www.boldegoist.com/
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#6
09-28-2013, 07:12 PM
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Oh in that case I guess I will give it a go. Do I need to remove the rubber gasket, or do I dab it on top?
__________________
1990 190E 3.0L
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#7
09-28-2013, 08:25 PM
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Answer
Quote:
Then apply a light coating on both sides. .
__________________
ASE Master Mechanic https://whunter.carrd.co/ 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 2003 Volvo V70 https://www.boldegoist.com/
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#8
09-29-2013, 08:58 AM
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Ok, so use the silicone with the gasket?
__________________
1990 190E 3.0L
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#9
09-29-2013, 10:00 AM
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Quote:
Not sure what the brand of the aftermarket one was, but the MB brand has the logo and part number on the edge of the gasket.
__________________
 1993 190E 2.3 2001 SLK230 1971 LS5 (454) Corvette Convertible
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#10
09-29-2013, 05:06 PM
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valve cover sealed with black rtv silicone, let idle for 15 mins and no leaks. Valve cover was relatively clean too so I didn't need to clean it.
__________________
1990 190E 3.0L
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