Quote:
Originally Posted by ossiblue
Don't have a picture, but the timing mark for TDC will have a "Z" by it on the pully. Don't forget you have a bunch of notches on the pulley but only one with the "Z". Once you find it, mark the notch with some paint.
The rotor turns clockwise so advancing the timing requires a counterclockwise rotation of the distributor body.
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On an SC, the rotor turns
counter clockwise. Those SC guys just have to be "different".
That picture looks like a Carrera but no matter which 911 you have it will have at least 3 marks 120 degrees apart to mark TDC for cylinders 1&4, 2&5, 3&6.
The TDC mark for 1&4 will have a "Z1" engraved on the pulley. It may be hidden by the AC pulley.
If there are other marks near Z1 you can determine which is the "real" Z1 because it will be 120 degrees away from the TDC marks for 2&5 and 3&6.
Alternatively, you can use one of those TDC indicators they hand out at Chinese restaurants to determine when the piston is at Top Dead Center.*
Does that make sense?
-Chris
* Stick a chopstick in the spark plug hole and note when the piston is all the way up i.e. TDC.