Need ignition timing help

[Deleted User]

The mechanic working on my Pacemaker did a tune-up with new cap, condenser and points. However, he was not able to time it because the manual he has, which covers all the old cars, refers to a setting at UDC. He is not aware what that means. He says he has never seen that before. I know TDC means Top Dead Center but can anyone help us with the meaning of UDC? Also, is the mark to use for timing on the flywheel? If so, where would he look for it, through the hole for the drain for the clutch fluid?
Thank you far any help you can give.

Geoff Blake

nick s

UDC = Upper dead center = TDC
yes, through the window above the starter where you would add the clutch fluid

[Deleted User]

Thank you so much, Nick S. I will pass that along to the mechanic. He did the timing by guess and bygosh, and it should really be done properly, wouldn't you say?

Geoff Blake

Park_W

And tell your guy that the "UDC" figure is for 80 octane fuel. Modern regular fuel calls for an advance of five degrees or so, and that will have a noticable effect on peppiness and gas mileage. Just heed the limit stated in the manual . . . no more than 1/2" from UDC (yes, they state it in inches, not degrees . . . strange.)

[Deleted User]

Thank you, Park, for that further information. That will be a great help. Peppiness is what the car has lacked for some time and I can see that not knowing about that extra five degrees could make a big difference.

Geoff Blake