Senior Tech Team
Join Date: Apr 2012
Location: Yerington, Nevada
Re: Timing problem with rebuild
Just what distributor is in the engine and supposely doing the "180 free spin"?
As Eric said, the engine wouldn't stay running if the rotor was doing the 180 free spin.
One test, take the cap off the distributor, no matter what kind it is, and grab the rotor, try to turn it around with your hand. The rotor should only move a short distance, then, snap back when you release the hand from it. If the rotor still moves past that, and the gear pin is OK, pull the ritir off and take a look at the top of the distributor shaft where it interacts with the rotor mount. Some shafts are pressed into the timing center, some are brazed on place.
One day decades ago, my next door neighbor had a 454 Suburban, he went to "the best shop in Whittier, California", where they proceeded to do work on his wallet, and then, had to have the thing smogged. Didn't pass. so I got to fiddle with it. One fouled spark plug, bad plug wires and the large coil n cap HEI had the brazing holding the shaft to the plate was broken. Plate, reluctor and rotor were all over the place but still ran. I simply took the distributor apart, realigned the cracks in the brazing, redid the braze, put it back together, timed it, set the carb, and the smog guy couldn't figure out how this one passed, "they never do".