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On the 530i the high beam switch is incorporated in the turn signal switch. With the headlamps on press the stalk forward towards the front of the car, does the blue high beam indicator in the instrument cluster come on?

I know that 3.45 is a pretty common ratio

TB

The nut should be 36mm BMW and other companies like Sir Tool make a crank holder that bolts onto the hub and braces against the subframe. The BMW version works well.

BMEP=Brake Mean Effective Pressure

Check spark and injector pulse (with a node light) and let us know what you have or dont have.

The oil is used with a hydraulic (oil filled) strut to facilitate cooling.

High and Low Aux Fan, don't know what the switch in the lower neck is for, mine is disconnected also.

Sherman, interesting, the 79 is set up a bit differently, I forgot about that... You are pretty much spot on with the id's the 3 wire port at the forward edge of the head was for some long forgotton BMW test tool, possibly to check timing and RPM... On your car with the water controlled idle valve o...

Sherman, the ECU temp sensor (I almost typed "DME" but we are dealing with L-Jet here) is on the thermostat housing. It is slightly buried, the sensor has a white plastic top where the harness connects (now prolly brown) and a 2 pin push on connector basicly like an injector connector (I d...