mrbenzes

Hi I'm doing the dreaded Balance shaft adjustment on my M272. I see that the camshaft adjusters need to be Locked with a pin upon removal...I locked mine but the right side one slipped and the adjuster basically sprung to a neutral position...is there a way to reload the adjuster back to the needed tension? the other one is still successfully locked. I'm assuming i need to just rotate the adjuster gear a few teeth and then re-lock it for re-installation..I just dont know how far to rotate it for the tension load.
Any help is appreciated.
Thanks, Mike

mrbenzes

Oh and I had one other question regarding the M272...does anyone have the torque tightening data for the timing case bolts?
Thanks in advance.
Mike

Rudeney

Unfortunately, you now must replace the adjuster. It cannot be repaired.

mrbenzes

Ugh, that's bad news...adds about $600 to my job...is there something internal that gets misaligned, it seemed that the front teeth only moved a quarter inch or so.

Rudeney

WIS will tell you if it slips, it's toast and there are a good number of reports of this very failure in the forums. It is spring loaded. I think what happens is the spring unloads and then comes loose, but the adjuster cannot be disassembled to repair the spring.

IdontownaMB

Im here to help anyone searching for the answer. It can be fixed easily.

You need a largish pair of snap ring pliers. and a flathead screwdriver.

Looking at the exhaust cam adjuster you see the part where you forgot to put a dowel pin. There is a half inch wide metal ring that presses against that part. This outer ring is the spring that holds tension on the outer row of teeth. Using the snap ring pliers you put one end in the dowel whole and the other in the little cutout on the spring ring. Then open it up. Slide a screw driver into the gap to hold **** in place. Then insert your dowel.

The tricky part is figuring out which direction to move the little gear row. The purpose of the spring loaded outer ring is to prevent noise between the gears on cold start. So its going to want to push against the intake cam's direction of rotation. For the left bank, have the dowel hole at 12 o'clock, using the pliers loosen the left side and insert the flat head at 9 o'clock, then lock your gears in place with the dowel. For the right bnk do the opposite so the screwdriver is at 3 o'clock.

Nothing cant be repaired.