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The distributor will need to be removed. The magnet is permanently attached to the distributor shaft and the shaft is held in place by a roll-pin thatpasses through the distributor drive gear on the bottom side of the distributor. Magnet on top, gear down in the engine, distributor shaft and housing in the middle.
Never saw the gear wear out. Distributor shaft and bushings, yes. Look for side to side play on the shaft. There should be no play.
Typical: Remove distributor. Use punch to tap roll pin from gear at base of distributor. Use an arbor press (not a hammer) to press distributor mainshaft out of gear. Shaft will then easily come free of the distributor. If a hammer is used, now replace the complete distributor. Unbolt the pickup and replace. Reinstall shaft and gear being sure that gear hole aligns with shaft hole. Install a new roll pin. Install in vehicle. Set ignition timing.
It should be turned by a gear on the cam shaft
Check the gear on the cam shaft, you can see it through the hole that the distributor mounts in.
There is a gear on the distributor shaft and a gear on the end of the camshaft that it engages with. The gear on the camshaft cannot be removed as it is part of the camshaft. The gear on the distributor shaft can be removed if it is worn; however, this is rare. These two gears must be in proper mesh for the engine to run; one cog off and it will not start.If you need further assistance google ' finding top dead center on a 350 chevy'.
Either the gear on the end of the distributor shaft is chewed off or the gear that drives it is . Possibly broken cam.
First remove distributor cap. loosen the bolt that holds down distributor and take holding plate of MAKE SURE YOU MARK DISTRIBUTOR POSITION AGAINST BLOCK AND ROTOR AGAINST DISTRIBUTOR HOUSING. pull out distributor from engine. now take out the pin that holds the gear on the distributor rotor shaft take the gear of the shaft, position of gear on shaft is not important. now from the the top of the distriburator pull the rotor shaft out and wow la. camshaft position sensor is ready to be taken out. To install just reverse the steps and when you ready to install the gear on shaft make sure that the gears is against the distributor housing and not on the tip of the shaft (up side down). installing distributor on engine. install the the rotor on shaft and turn it about 20 degrees clock wise so when you push the distributor into the engine is going to turn back to the original position. You are welcome jcdl. 7-10-08
if your talking about when your cranking the engine over with the cap off, then you have a broken distributor gear or shaft or bad camshaft gear.
No the distributor gear that is on the end of the distributor is to small for the big block cam shaft.
To dismantle the distributor already off of the engine: 1. Mark the position of the drive gear on both the gear and the shaft so they can be put back together in the same location. 2. Support the body of the distributor and using a suitable drift punch the drive pin out of the gear and shaft and remove gear. 3. The shaft will now come up through the distributor housing, and is essentially taken apart. 4. To remove the pickup coil remove the clip that holds it in place and take it out. 5. To remove the ignition module take out the screws.
you can turn it with a long handled screw driver if you wish, but its easier to just turn the distributor until it drops down into place. then set your timing