ML350 - M276 - Cam Chain Tensioner + Check valve install instructions
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ML350 - M276 - Cam Chain Tensioner + Check valve install instructions
i everyone,
I’ve been searching all day for a proper step-by-step guide or PDF that covers replacing the hydraulic cam chain tensioners and installing the updated check valve (the common rattle fix on the later-style tensioners).
So far the only thing I’ve found is the ~7-minute official Mercedes tech video on YouTube, which is helpful for the general idea but way too brief and lacks the torque specs, special tools list, tricks, and detailed steps I’d like before tearing into the job this weekend.
If anyone here has access to:
Car is a 2013 ML350 with the M276 engine (happy to give exact model/engine code if it matters or VIN)
Thanks in advance—really don’t want to miss anything.
Much appreciated!
I’ve been searching all day for a proper step-by-step guide or PDF that covers replacing the hydraulic cam chain tensioners and installing the updated check valve (the common rattle fix on the later-style tensioners).
So far the only thing I’ve found is the ~7-minute official Mercedes tech video on YouTube, which is helpful for the general idea but way too brief and lacks the torque specs, special tools list, tricks, and detailed steps I’d like before tearing into the job this weekend.
If anyone here has access to:
- WIS/ASRA (EPC)
- StarTekInfo
- Or a good factory-level PDF/write-up
Car is a 2013 ML350 with the M276 engine (happy to give exact model/engine code if it matters or VIN)
Thanks in advance—really don’t want to miss anything.
Much appreciated!
Out Of Control!!
Joined: Apr 2019
Posts: 11,924
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
startup rattling fix
i everyone,
I’ve been searching all day for a proper step-by-step guide or PDF that covers replacing the hydraulic cam chain tensioners and installing the updated check valve (the common rattle fix on the later-style tensioners).
So far the only thing I’ve found is the ~7-minute official Mercedes tech video on YouTube, which is helpful for the general idea but way too brief and lacks the torque specs, special tools list, tricks, and detailed steps I’d like before tearing into the job this weekend.
If anyone here has access to:
Car is a 2013 ML350 with the M276 engine (happy to give exact model/engine code if it matters or VIN)
Thanks in advance—really don’t want to miss anything.
Much appreciated!
I’ve been searching all day for a proper step-by-step guide or PDF that covers replacing the hydraulic cam chain tensioners and installing the updated check valve (the common rattle fix on the later-style tensioners).
So far the only thing I’ve found is the ~7-minute official Mercedes tech video on YouTube, which is helpful for the general idea but way too brief and lacks the torque specs, special tools list, tricks, and detailed steps I’d like before tearing into the job this weekend.
If anyone here has access to:
- WIS/ASRA (EPC)
- StarTekInfo
- Or a good factory-level PDF/write-up
Car is a 2013 ML350 with the M276 engine (happy to give exact model/engine code if it matters or VIN)
Thanks in advance—really don’t want to miss anything.
Much appreciated!
If so are the intake phaser locked or failed?
Tensioners can rattle with or with out check-valves. They do already have an internal built-in check valve.
No1 cause: rattles are VVT Phasers
No2 cause: limp tensioners on thin oil.
New tensioners always a good thing
Last edited by CaliBenzDriver; Nov 26, 2025 at 02:38 PM.
Out Of Control!!
Joined: Apr 2019
Posts: 11,924
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
rattling becoming louder
Then two camshafts will simply need replacement in addition to two phasers and associated labor charges.
Last edited by CaliBenzDriver; Nov 28, 2025 at 06:01 PM.
