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#1
08-13-2024, 10:36 PM
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E320 W211 - 2005 - M112 Valve Train Questions...
Just bought the above car - with the M112 engine. Starting with addressing misfires on a couple of cylinders - and cover gasket leaks...
Among other projects - and while I'm in there, Looking at doing a general update on the heads - Definitely needs valve cover gaskets, doing valve guide seals, and I don't think plugs have ever been changed on this 170k+ car... ! Am assuming(?) the bolts on the valve train are the torque-yield (on-time use) type? Do these bolts pass through completely? IE, are they actually head bolts? Anyone have specs on these bolts? Exact dimensions? want to order all I need before starting the project. Should I replace the head bolts while I'm doing this? Alternatively, is there a high-mileage re-torquing spec on those bolts?
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'83 300 SD '05 E320 4Matic '06 BMW 530 xi '68 Triumph TR 250 - The only car I ever loved more than the Mercedes; who needs electricity, anyway? - Damn, why did I sell it?! '59 Jaguar 3.4 'Le Chat Noir' - Damn, why did I sell it?! It's difficult to make predictions, especially about the future. - Niels Bohr 
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