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Original Message
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| Two things... |
| By Kevin66 - 07/14/2002 6:24:59 PM; IP 207.102.191.72 |
| I've seen occasional evidence of gears wearing badly when a block has been decked and/or cylinder heads cut, and/or intake manifold milled to fit same. The net effect can be that the intake manifold now sits 'lower' on the engine, and the distance from the distributor hole down to the block casting where the distributor pilot hole is, has been shortened. If you've resorted to using silicone on the end rails because the stock cork/rubber end seals WON'T fit or stay in place, it's usually because of this. When the distributor clamp is tightened, it pushes the distributor down deeper, and the gear drags agains the top of the pilot casting. Since the cam is attempting to turn the distributor, the resistance to rotation causes rapid, excessive tooth wear. Check the bottom surface of your distributor gear for evidence of this rubbing (shiny spots). Whenever installing a new cam, always use a new distributor gear. They mate in to each other, not unlike the way ring & pinions or transmission gears & clusters do. Liberally coat both the cam and distributor gear teeth with the same break-in lube used on the rest of the cam, to give it the best chance for a long life. |
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