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11-30-2021, 02:46 PM | #21 |
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Location: Melbourne, Australia
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Re: wrong rotor position
I once had the timing on one of my cars go out of adjustment as I took off from the lights. Like the OP, the rotor was pointing half way between the contacts and the car was backfiring so badly it sounded like WW3. After much head scratching and resetting, I found that the rotor button was faulty. The little protrusion inside it that is supposed to locate in the notch in the cam was barely there. It had been made that way, not broken. It was so small that the rotor was free to move on the cam with very little resistance. I am still surprised that it stayed put for as long as it did.
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11-30-2021, 02:47 PM | #22 | |
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Re: wrong rotor position
Quote:
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11-30-2021, 02:56 PM | #23 |
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Re: wrong rotor position
As usual, Synchro has probably hit the nail. Try turning the rotor back and forth.
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11-30-2021, 03:09 PM | #24 | |
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Re: wrong rotor position
Quote:
One thing people often over look is changing the point gap will also change the timing (if nothing else has changed). |
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11-30-2021, 03:41 PM | #25 |
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Re: wrong rotor position
To me the last two pictures look correct, the points are just ready to open.
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11-30-2021, 04:00 PM | #26 | |
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Re: wrong rotor position
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12-02-2021, 01:22 AM | #27 |
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Location: Portland OR
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Re: wrong rotor position
RE the washer under the cam, all the original A distributors I have taken apart have a thin special lock washer under them, the replacement "B" style use an off the shelf lock washer.
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12-02-2021, 07:03 AM | #28 |
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Join Date: May 2010
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Re: wrong rotor position
Addition to post #27.
Look in the Green parts book. Original distributor cams had two washers one thin lock washer and one thin flat washer. I found that if the thin washer is missing that the original screws will bottom out and allow cam to move thus the timing will change. Repro screws might be longer which would make it worse if used with original washers. I did not look that close. Recently repro lock washers are about twice as thick as original lock washers. Because they are so thick you must loosen them much more that originals to make adjustments to the distributor cam. Last edited by Benson; 12-02-2021 at 08:32 AM. |
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