Modern Points Adjustment

M

Maurer1929

Member
Seems like the original points had a single screw adjustment but the modern points have 2 adjustment screws to the bottom plate. What is the correct way to adjust the modern points? Do you use a feeler gauge in the points at 0.018", push tab to cam and tighten both screws? Thanks
 
From the NUREX web site


A unique, easy, and accurate point gap adjustment procedure follows:
Distributor Out of Engine
  1. (a) Place the furnished 0.020" plastic gage in a vertical position between the point contacts. They are to be set for 0.020" plus or minus .002" gap. Loosen the two hold-down screws to just allow the point assembly to move with some friction when the stationary point is moved by hand. Install the cam, washer, and hold-down screw.
    (b) Tighten the cam just enough so it rotates as the distributor shaft is turned. Turn the shaft and cam CCW (direction of engine drive) and allow the flat to contact the point rubbing block. Push the points to contact the cam then continue to slowly rotate the shaft. The cam will ride against the rubbing block, moving the point assembly around its pivot point. Continue the shaft rotation until the cam high point is reached and the point assembly maximum rotation is observed. Tighten the 2 hold-down screws. The point gap is now adjusted for 0.020" gap.
    (c) If the shaft is rotated through 360 degrees, the concentricity of the shaft and cam can be observed. A perfect cam, shaft, and bearings would show the same "just touching" the cam high point at 4 places.
    (d) Remove the plastic feeler gage. The points will spring closed. The points should open and close as the shaft is rotated. The gap openings should be within about plus or minus .001" of each other for uniform operation.
  1. ...
 
I would initially set the points at .020-.022. As the rubbing block wears down, the points will close up. By setting them to the wide side of the range of acceptable gap, they will remain within this range longer as the rubbing block wears down.

This is what I do,

Chris
 
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