HI All,

I am taking out my engine and transmission out of my 1977 Mercedes 450 SLC.

the reason is to change the transmission. however whilst it is out will be good to do some general maintenance.

After turning motor to check timing marks. When Both cams are aligned on the timing marks, the crank pulley is about 6 degrees past Zero.

Is It necessary to change the timing chain ?

I will change the upper guides.

The cams look in generally good condition,

your suggestions is appreciated.

regards
C