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What is a camshaft synchronizer?

Updated: 12/24/2022
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A camshaft synchronizer is a device driven off the camshaft that couples to a sensor that tells the car's powertrain computer at what point of rotation the camshaft is. The information from the sensor is used by the powertrain computer to time the spark that will ignite the air-fuel mixture in the cylinders. Many engines using camshaft synchronizers are older designs that were originally designed to have a conventional distributor; the camshaft synchronizer mounts in the same place as the distributor used to.

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Q: What is a camshaft synchronizer?
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A trick is to try to remove the synchronizer without altering the natural rotation so you can note its new location in relation to the mark on top (about ⅜" counter clockwise) this will be useful later when installing the new part. Transfer the marks made on the old synchronizer to the new synchronizer as accurately as possible. If the oil pump hex came out of the engine with the synchronizer assembly then yank the shaft out of the old synchronizer and insert the correct end into the new synchronizer making sure it is seated fully into the new part. Pour new motor oil onto the internal portions of the new synchronizer bearing and gears and rotate working in the oil.Insert the new synchronizer back into the hole. The spiral gear will begin to engage about 2" above its fully seated position. 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