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Torque Specs HELP

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Old 02-22-2023, 11:40 AM
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C63 W204
Torque Specs HELP

Serpentine Belt Guide Pulley Torque Specs needed.

Would anyone kindly be able to help me with the exact torque specs of the following 4 guide pulleys in changing with my belt. My tensioner is fine so I'm not replacing it. I've searched around here and getting conflicting info. Some day 20Nm others say 25Nm. I assume blue medium threadlock also?


Old 02-22-2023, 09:48 PM
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
Here are the R&I Belt Drive Pulley instructions from AlldataDIY with torque specs. Thread lock is probably a good idea for peace of mind.

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Old 02-23-2023, 02:41 AM
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Originally Posted by Mort
Here are the R&I Belt Drive Pulley instructions from AlldataDIY with torque specs. Thread lock is probably a good idea for peace of mind.
Amazing Mort. I really appreciate the help!
Old 02-23-2023, 08:05 AM
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Thread lock will impact the torque setting slightly vs dry torque, locktite recommendation is to reduce torque 20% when torquing with a lubricant vs dry. Mercedes doesn't call for a thread locker but if it makes you feel better using some just reduce your torque settings a little so you don't over torque it due to the reduced friction of the liquid thread lock. If you use the paste I think you can use the full torque values.
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