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Old 10-10-2009, 10:38 PM
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Join Date: Sep 2006
Location: USA
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Red face Please help me place this bolt on my 603

Well, this is embarrassing. I'm nearly finished getting my OM603 back together after R&R'ing the head, and upgrading the alternator. I now find I have an "extra" 10mmx16 socket-head bolt, without an obvious place to put it. I remember removing it, but can't recall from where. Yeah, I know, I should have labeled everything. Anyone recognize this orphan?
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Please help me place this bolt on my 603-mb-bolt.jpg  
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Old 10-10-2009, 10:43 PM
Wodnek's Avatar
Vintage Mercedes Junkie
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Location: Southeast Wisconsin
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Is it for the turbo intake crossover? (No idea what its called LOL)
1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
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Old 10-10-2009, 10:49 PM
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Well, it's a loner, wherever it belongs. And it's short and fat, with evidence of loctite on the threads. The crossover is in place, and I can't see where this might be attached there.

Also, it's a grade 8.8 bolt.

Last edited by Rob124; 10-10-2009 at 10:55 PM.
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Old 10-10-2009, 11:05 PM
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Jeesh, I would almost say fan clutch to coolant pump pulley - but it is a little short for that
327K on 1986 W201, 602.911, 722.414 2.5 190D ("The Red Baron")
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Old 10-10-2009, 11:10 PM
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Location: Saskatchewan Canada
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valve train? intake fastening? I would at least take the valve cover off and insurance.
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2002 E430 4matic (212,000km)

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Old 10-10-2009, 11:41 PM
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Mystery solved, I think. It fits onto a bracket on the intake side of the turbocharger. The giveaway was the residue of orange thread-locking compound still in the hole. Must be high-temp compound, though, and I don't have any of that.
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Old 10-11-2009, 12:24 AM
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I'm sure Carquest (the old B&B)/Napa/Schucks downtown Redmond; all on Redmond Way except Napa which is kitty corner from the Arco... sort of, would carry the stuff.
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Old 10-11-2009, 10:18 AM
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Looks like Loctite 272 is the correct item.
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