heliflyer

Can someone please explain exactly what function the flywheel pins serve?
The Manual suggests they are part of the oil temperature sensor but I fail to see how they would function. I thought they were balance weights!!

I have unfortunately broken one off so was considering drilling it out and then inserting a threaded rod all the way through the pin to screw into a tapped hole in the flywheel.

Can anyone confirm if this is a feasible option, or is it ok to run with just one pin?

Car is a Euro 16V auto if that helps any.
Thanks
Jay

Landseer

What manual is that? Those don't have anything to do with oil sensing.

John Speake

I thought they were the pegs for the unused diagnostic port that is parked on the bellhousing.

heliflyer

I didn't think so either - I guess something got lost in the translation from German to english!!
Image is taken from page 10-14 edition XII printed 1989 Porsche 928 workshop manual - pdf version !!

I take it you don't know what they do either??

Mike Frye

The 5 speeds have pins like that for locating the clutch. Not sure if they're the same ones.

Rob Edwards

Not the same- Three 5-speed pins are spread equally around the flywheel/PP 120o apart. 2 narrow ones of equal diameter and a thicker, stepped one.

Mike Frye

Thanks,

EDIT:

I looked back and found the pics of my clutch job. You're right, they are not the same pins. The ones for the clutch/PP are on the flywheel, the autos and 5-speeds all seem to have these pins.

blown 87

They are, at least on a S4.

Landseer

Am almost certain they correspond to the TDC sensor that we don't utilze - test connection.

The front-most sensor is CPS, rear one is TDC. Try looking at manual page 28-40,41,42 describing ignition

heliflyer

So do you guys think I don't need to worry about the broken one?

heliflyer

Soooooo - Anybody have any opinions on whether I can ignore the broken pin or not ? !!!

Lizard928

fugetaboutit

AO

It *may* cause the unit to be slightly unbalanced. As such you may feel a vibration - and maybe only at some specific RPMs. But I'm with Colin. If it were my car, I'd say ***** it.

heliflyer

Thanks - I'll look into drilling and tapping a stud to re attach it to help with the balance.
Cheers