Hello,

I am currently doing a huge project on my M103 and am just weary about the Timing Chain & How to Re-time it and re-tension?

Tensioner has been... loosened? I may just take it out and install a new one, and I've just loosened the top half of the guide rail so I could slip the sprocket off of the camshaft to remove the head.

I haven't removed ANY of the accessory belt, is that required to retime the engine? The chain is still in it's original place, with about 3cm of play in it.

However the camshaft timing marks aren't lined up, the punch hole is off of the point by 2cm.

Engine ran TERRIBLE before this project so I'm curious if the timing was out, Was misfiring alot on cylinder 6 aswell. Very thick carbon buildup compared to any other pistons.


If anyone can shed any light on this it would help me alot I'm a rookie learning the ropes hahaha. My main tutor is factory maintenance manuals

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Thanks for reading & hope you have a great day