Assistance with M156 Camshaft Adjuster

[Chrishazle]

Greetings to everybody,

I have just finished repairing my camshaft adjuster plates. I ultimately completed only one. I secured the cameras with the tool and reassembled everything. In what position must the motor be to initiate engine start-up? I estimated 0° TDC.


Thank you.

I am a newcomer, possessing a 2007 E63 with 79,000 kilometres.

[AMG33D]

should be able to assist, having recently completed this task on his M156

[ML350_Colin]

This position necessitates a considerable understanding, particularly about temporal configuration. I strongly advise reviewing Tasos' videos numerous times before to attempting.

The crank pulley must be positioned at 40 degrees, and the piston in cylinder 1 (bank 1) should be at its apex; this is the initial step to confirm that the cylinder is at its top dead centre (TDC). To determine when cylinder 1 is at its highest position, remove the spark plug and carefully insert a clean rod through the spark plug hole to measure the distance.


The timing tools simplify the task by eliminating all uncertainty. Simply affix the tools, which will secure all components in position from the camshafts and assist in aligning the phasers. If you are somewhat inexperienced and have not undertaken this task previously, I strongly recommend entrusting the job to a respected mechanic for your piece of mind. I have a friend who made a mistake and subsequently damaged valves.

This video about timing is excellent.

[ML350_Colin]

 

[Chrishazle]

Greetings, I have successfully done the task. I utilised the timing tool, ensuring that the timing remains accurate as the cams and other components were secured. Now that I have completed the assembly, my sole inquiry is the appropriate position of the crank for starting the vehicle. The service position was at 40°; I presume it should be at 0° to initiate the vehicle?

[ML350_Colin]

Greetings,

Once everything is secured and tightened in the service position at 40 degrees TDC, the timing is finalised.


Once the timing is accurately established and secured at the service position, namely at 40 degrees TDC, the vehicle can be initiated from any position; it is not necessary for it to be at 40 degrees to commence operation.

To ensure piece of mind, I typically rotate the tools many times to confirm they return to the service position, allowing for an assessment of any slack in the timing chain.

Upon initiating the vehicle for the first time, I also engage and disengage the ignition momentarily several times to facilitate the buildup of oil pressure and enhance oil circulation.

Additionally, refrain from revving the engine; allow the idle to stabilise autonomously.
Please provide several photographs. 👍

[Chrishazle]

Thank you very much.