Originally Posted by supershaft
Ambiguity? Not from BMW specs. There is all the BS and there is the specs. That isn't ambiguity.
I've been told once to refrain myself from cam discussions but at least I'll share the information I have.
The BMW service bulletin that is floating around here in Germany is from July 1980 and it says:
The position of the key slot of the cam is changed by three degrees.
The timing numbers show an advance of six
degrees with respect to the crank.
| Nockenwelle 0° |
| Nockenwelle 3° |
| Einlaß öffnet 32° vOT |
| Einlaß öffnet 38° vOT |
| Einlaß schließt 52° nUT |
| Einlaß schließt 46° nUT |
| Auslaß öffent 52° vUT |
| Auslaß öffnet 58° vUT |
| Auslaß schließt 32° nOT |
| Auslaß schließt 26° nOT |
Are these specs correct?
These are the same numbers shown here:
Anyone ever checked them?