SL-Class (R231) 2013 on: Discussion on the SL550

SL/R231: Water Pump Bolt Torque specs

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Old 11-21-2022, 03:50 PM
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Water Pump Bolt Torque specs

Hello,
Does anyone know what the torque specs are for the water pump mounting bolts and sequence? The are the Torx bolts that bolt the water pump to the engine.
It is a 2012 mercedes sl550 V8

Last edited by jakubmomentum; 11-21-2022 at 04:17 PM.
Old 11-21-2022, 05:00 PM
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2020 GLC300 -2013 Sl550 - 1997 SL600
Originally Posted by jakubmomentum
Hello,
Does anyone know what the torque specs are for the water pump mounting bolts and sequence? The are the Torx bolts that bolt the water pump to the engine.
It is a 2012 mercedes sl550 V8
See attached PDF.

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File Type: pdf
Bolt plan for coolant pump.pdf (126.0 KB, 301 views)
Old 11-21-2022, 05:02 PM
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Thank you, there are notes there with regards to engine number in the right hand column. Is that printed somewhere on the engine or is that a reference to the VIN?
Old 11-21-2022, 05:06 PM
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Originally Posted by jakubmomentum
Thank you, there are notes there with regards to engine number in the right hand column. Is that printed somewhere on the engine or is that a reference to the VIN?
M278 will be for the SL550, others are AMG engines….
Old 11-21-2022, 05:12 PM
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And last question, though I see the letters, there is no actual numbered sequence where to start. Would you start from the middle proceeding diagonally and across working your way to the outside?
Old 11-21-2022, 05:29 PM
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2020 GLC300 -2013 Sl550 - 1997 SL600
Originally Posted by jakubmomentum
And last question, though I see the letters, there is no actual numbered sequence where to start. Would you start from the middle proceeding diagonally and across working your way to the outside?
Here’s the tightening sequence (see attached PDF) (M278)


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Old 11-21-2022, 05:32 PM
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Thanks a million.
Old 11-21-2022, 06:37 PM
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Sorry one more time, do you by chance know the torque specs on the pulleys for the serpentine belt?
Old 11-22-2022, 10:33 AM
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2020 GLC300 -2013 Sl550 - 1997 SL600
Originally Posted by jakubmomentum
Sorry one more time, do you by chance know the torque specs on the pulleys for the serpentine belt?

see attachment,
It goes without saying, if you’re going to work on these cars, I would at least recommend getting the WIS.


Good Luck
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Last edited by crconsulting; 11-22-2022 at 11:12 AM.
Old 11-26-2022, 01:52 AM
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stupid question but what is the WIS?
Old 11-26-2022, 11:56 AM
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Originally Posted by jakubmomentum
stupid question but what is the WIS?
Workshop Information System (XENTRY WIS)
ie “factory service manual”


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