Question,which is better,the factory silicone sealer (the black stuff)or the loctite 5900 sealer This is for the notorios top timing chain/front cocer.Also where can I get this loctite 5900?

I bought the Mercedes oem, because the Loctite wasn't available where I live. Take a look at my thread that has pictures of the sealant and the job. Pages 4 and 5 might be of interest to you starting at post #51:

M103 Oil leak or burning?

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1989 300CE Astralsilber/Schwarz
1992 300CE Schwarz/Schwarz

I've used the Mercedes OE twice, seems to work okay. (But I thought it was the same as the Loctite?)

I believe I saw a thread here a few months ago that concluded that they were the same - except of course for price, which is several times higher for the MB version. I believe the Loctite is widely available for a few bucks.

FWIW, my MB mechanic and I use Permatex's "The Right Stuff".

It was been about 2-years now since we've used it, and NO LEAKS, and a M104-engine (C36).

:-) neil

used on my M103, works great, two years on top timing chain cover. About to use on my other MB also.

http://www.permatex.com/auto/autouh.asp?automotive=yes&f_call=get_item&item_no=25249


Robert

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89 300te 222,222
92 300e 190,000