bronze gears

[hauss]

Originally Posted by wolf k

After I wrote that, I wondered about what if you heat the gear prior to installing. You would have to act fast with the installation and have an alignment drift ready. Also, you would have to use the same gear from the same manufacturer to ensure the hole in the gear is located in the same exact place as the hole in the old gear.
As we know, distributor gear depth is critical on Fords. I recently diagnosed a customer's ignition issue due to worn distributor gear. Gear had been replaced prior and not installed deep enough on the shaft by .050". Well sure enough, his bearing pad in the block was ground down by the same amount. Metal shavings throughout engine, although his gear was iron.

Did you apply white grease or gear paint and check the pattern?

[wolf k]

Originally Posted by hauss

Did you apply white grease or gear paint and check the pattern?

No, since my diagnoses came after the damage was done. All I could do was install a new gear in the correct location and recommend his block be repaired.

On a Ford, it is the bearing pad in the block that locates the distributor gear for correct mesh. But you have to install the gear on the distributor to the correct tolerances given by Ford, so that the gear actually contacts the pad in the block.

If you set the gear too deep on the distributor shaft, then the downward thrust of the gear is absorbed by the small bearing in the distributor. This will shorten life of distributor. Also gear mesh will not be correct.

If you set the gear too shallow on the distributor shaft, then when the distributor housing is tighten via the clamp, this will jam the gear hard into the pad in the block and severe wear will result in short order.

[hauss]

Originally Posted by wolf k

No, since my diagnoses came after the damage was done. All I could do was install a new gear in the correct location and recommend his block be repaired.

On a Ford, it is the bearing pad in the block that locates the distributor gear for correct mesh. But you have to install the gear on the distributor to the correct tolerances given by Ford, so that the gear actually contacts the pad in the block.

If you set the gear too deep on the distributor shaft, then the downward thrust of the gear is absorbed by the small bearing in the distributor. This will shorten life of distributor. Also gear mesh will not be correct.

If you set the gear too shallow on the distributor shaft, then when the distributor housing is tighten via the clamp, this will jam the gear hard into the pad in the block and severe wear will result in short order.

On a msd dizzy, you can adjust the collar, that sits on top of block and set to recommendations. Then check the pattern that is what I was talking about.

[Gaz64]

Originally Posted by hauss

On a msd dizzy, you can adjust the collar, that sits on top of block and set to recommendations. Then check the pattern that is what I was talking about.

That is the beauty of an adjustable collar, if you have one.

And mesh pattern checking is a good habit to be in, not many would do this.

Gary

[blykins]

Originally Posted by hauss

On a msd dizzy, you can adjust the collar, that sits on top of block and set to recommendations. Then check the pattern that is what I was talking about.

Adjustable collars are only for GM distributors.