On my old 190E, seen from the front of the car, the advance timing markings on the crankshaft pully consists of:
|------- 2|0 --- 1|0 --- O|T -------|
and should (does) describe the timing advance of the ignition, in relation to TDC on cylinder 1
As the engine turns anti clockwise, the O|T mark parses the pointer on the timing chain cover first, followed by 1|0 and then the 2|0 mark. Therefor the 1|0 mark comes before the 2|0 mark in the engines rotation cycle.
The 1|0 and 2|0 markings, should indicate how many degrees BEFORE TDC the crankshaft is in its rotation cycle, and 20 degrees before TDC is PRIOR to 10 degrees !?. But how can this be possible ?. If the markings indicated degrees AFTER TDC then it would make sense, but it doesn't.
This is confusing. Maybe someone can shed some light on the subject.
/Bo
|------- 2|0 --- 1|0 --- O|T -------|
and should (does) describe the timing advance of the ignition, in relation to TDC on cylinder 1
As the engine turns anti clockwise, the O|T mark parses the pointer on the timing chain cover first, followed by 1|0 and then the 2|0 mark. Therefor the 1|0 mark comes before the 2|0 mark in the engines rotation cycle.
The 1|0 and 2|0 markings, should indicate how many degrees BEFORE TDC the crankshaft is in its rotation cycle, and 20 degrees before TDC is PRIOR to 10 degrees !?. But how can this be possible ?. If the markings indicated degrees AFTER TDC then it would make sense, but it doesn't.
This is confusing. Maybe someone can shed some light on the subject.
/Bo
