Reply to "Distributor Gear"

bosswrenchMember

If you've ever seen a worn distributor gear pulled out of a 351-C, the gear teeth are razor-thin and makes one wonder just where all that metal went....
Along with George's comments, I'll add that when a bronze gear wears, the particles torn off don't seem to cause much engine damage, but when a nitride-treated iron gear wears, the hard particles could cause quite a bit of damage to cylinder walls, bearings and the oil pump body.
Rule of Thumb on bronze gears is- change them when the ignition advance retards more than 3 degrees, or in any case after 3000 miles of use. Frequent inspections of the gear teeth might extend this duration a bit on street cars.

11/16/1011:46 AM

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