Engine rotation - PeachParts Mercedes-Benz Forum

97 SL320 · #1 10-28-2012, 02:41 PM

I'm not sure if there is a standard other than the convention we assume.

For most engines, yours included, when viewed from the crank _pulley_ the rotation is Clockwise. When viewing this same engine from the _flywheel_ it is Counter Clockwise.

There are few engines that have reverse rotation, motorcycles usually are, one engine of a twin engine boat / aircraft and, owing to their motorcycle origins, most Honda cars.

dieselmania · #2 10-28-2012, 02:45 PM

well then that means I rotated my engine the wrong way, I turned it CCW for several revolutions with the crank pulley nut.

pawoSD · #3 10-28-2012, 03:00 PM

Quote:

Originally Posted by dieselmania

well then that means I rotated my engine the wrong way, I turned it CCW for several revolutions with the crank pulley nut.

That is REALLY not good. Its clockwise from standing in front, so it should rotate towards the drivers side. There's the possibility you messed up the timing chain by going backwards. I would rotate it several times in the correct direction by hand to make sure it is all still turning correctly without anything clanking or hitting in the right direction before trying to start it again.

dieselmania · #4 10-28-2012, 03:16 PM

I just went out there and rotated it around 3 times, everything seems fine, smooth and no noises. One thing I took advantage of is the fact that I have the vacuum pump off, I checked the timing marks after my CCW rotation, then I carefully and slowly began a controlled CW rotation until I saw the timing device begin to move. It was at about 2 degrees into the CW rotation. Sort of a red neck timing chain stretch check, like we used to do on the gassers by watching the distributor rotor. Whuddya think?