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M273 crankshaft access on W212 E550

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Old Feb 25, 2024 | 12:40 PM
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mgiara
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From: San Diego, CA
2013 Altima, 2011 E550
M273 crankshaft access on W212 E550
Hello experts!

I bought an OTC leakdown test kit to get an idea of the "surface level health" of the E550 I just bought.

I see FPC Euro has a video on how to access the spark plugs, that seems easy.

How accessible is the crankshaft in this car? What size socket might I need to rotate it for the test?

I'm prepared to do this test today, including buying a GoPro to make a quick video of the process if it's not a nightmare to turn the crankshaft.

Just checked under the hood, is it this one?
Doesn't seem horribly inaccessible. Not seeing a bolt head on it though, any idea what size?


Last edited by mgiara; Feb 25, 2024 at 12:46 PM.
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Old Mar 8, 2024 | 09:52 PM
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BlackML550
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2010 ML550 VIN WDC1641722A564750, 2010 B180
"Special Tool Time." This is the socket you need to rotate the engine by hand. See attached.
Attached Thumbnails M273 crankshaft access on W212 E550-socket.jpg  
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Old Mar 8, 2024 | 11:32 PM
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Originally Posted by BlackML550
"Special Tool Time." This is the socket you need to rotate the engine by hand. See attached.
THANK YOU SO MUCH!!!
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Old Mar 9, 2024 | 12:02 AM
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BlackML550
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2010 ML550 VIN WDC1641722A564750, 2010 B180
You might find something like this in the aftermarket. Google the part number. Good Luck
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