Quote:
Originally Posted by Zulfiqar
quick question,
Ive got an OM606 also, and it had a removable TDC pointer, in order to service the water pump it needs to be removed, I did the water pump not long ago and had to remove the bracket, I had put some marks on it but were grease pencil marks - and they washed away (because I literally wash everything I open up with solvent) - I tried my best to align it to the worn out depression (scratches) the mounting screw had left on it.
now how can we determine TDC again at this point? i.e. if I would want to check chain wear.. or for any other job that requires TDC to be set.
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For a 617.952 the service manual shows removing the Prechamber on #1 and gatting a Dial Indicator extension pointer down on the top of the Piston Head to find TDC (with this method any stroke is OK).
ARMY had the ides of getting the Piston up near TDC, Removing a Valve Spring and letting a Valve drop onto the head of the Piston. The Valve now becomes the Extension for the Dial Indicator.
The catch is that the 617 Engines use Nuts instead of Valve Stem Keepers to hold the Spring Retainer on. On the newer Engine it may not resonably be possible to To loosen a Valve while it is on the Engine without disturbing other stuff.