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#1
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M276 W166 Cam Timing
I am completing the right timing chain tensioner replacement on my 2014 ML350. I would like to ensure that the chain hasn't jumped a tooth.
Can anyone tell me if the cam position in the pictures is correct? Crank set to 40 when viewed from directly above. I have a tool to check the cams from under the valve covers but I sure would prefer to avoid removing the valve cover. Thanks for your time, Alex |
#2
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The cam marks might not mean much. Many engines use non keyed cam / crank wheels and the cam locking tools are used to set the valve timing. This is way faster in the factory then lining things up and offers exact cam timing.
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#3
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Thanks for the note 97. Seems like I'm going to learn to use the timing tool set.
Alex |
#4
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The only way to know is remove the valve cover to verify Hash mark lazer mark at cam is level withe the head, did you move gears when doing tensioner?,they dont move when doing the tensioner,s
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#5
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Hi Nulu,
Yes I moved the crank while the tensioner was out. I had the crank set 1 rev off and couldn't move the silver arm enough to install the new tensioner. I have rotated the engine by hand and there is no binding (yet). Removing the valve cover seems straight forward... except for the attachments on the rear of the cover. Intake manifold is removed. Disconnect the fuel manifold at the 19mm collar nut Remove ignition coils Disconnect all electrical connectors. Remove all screws from top of cover. Remove screws from front of chain cover. … Looks like (at least) 2 screws attaching a round shaped component at the rear of the cover between the cover and the firewall. I don't know if that component will come along with the valve cover, or should the component(s) be removed before attempting to remove the valve cover? Thanks for you time and knowledge. Alex |
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