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1966 F250 2wd 352
There will be pics and I'll try to put them in order....
problem:
Groove in rotor had me scratching my head. Dizzy shaft has virtually zero side to side travel....but nearly 1/8" up and down where the rotor sits. I've never done this before, but I'm guessing that's my problem.
I had no clue how to tear this thing apart, but I muddled through it the best I could.
The upper part of the shaft where the rotor sits has a felt plug in it that covers a spring clip.
Pop the clip, and the top part pops off.
There is a metal washer that separates this part from the part below. It looked worn....but what do i know? I haven't seen a new one to compare it to.
1. Is the up and down travel excessive? (I believe it is)
2. Is my problem likely that washer?
3. Can I replace it with whatever thicker grade 8 washer is handy as long as the inner and outer diameter is right?
1966 F250 2wd 352 There is a metal washer that separates this part from the part below. It looked worn....but what do i know? I haven't seen a new one to compare it to.
1. Is the up and down travel excessive? (I believe it is).
2. Is my problem likely that washer? Probably a worn bushing - 12120 in pic.
The weights (12188), springs (12191/12192) and point plate (12151) are probably also worn.
That does not look like the correct thrust washer. I don't have a distributor completely apart right now but I'm pretty sure that that washer should only be .035 to .040 thick. If you don't have a shop manual and are not experienced in working on distributors I would highly recommend sending that one to a rebuilder. Mainly because it appears to be an original with the correct numbers on it. And any disassembly beyond where you are right now will require a press and the ability to put the distributor gear on at the correct position. The groove in that rotor was most likely caused by someone who knew nothing about distributors just dropping any old washer under that cam plate and putting it back together. Which would cause the rotor to sit too high and possibly hit the contacts in the cap. If the 12120 bushing that ND referred to is so worn that the distributer shaft is moving around enough for the rotor to hit the cap it has probably done damage to the gear and possibly even the pad in the block and the camshaft gear. Here is something from Ford Performance on distributors. Your gear should be at 3.071 to 3.080 and the end play between .025 an .032
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