Reply to "Engine rebuild"

davidnunnMember

quote:
They seem to have mixed reviews.

bdud, I assume when you say poly gears have "mixed reviews", some were negative. Can you elaborate on what the problems were?

Tri-Tech told me they've never had a 351C/460 gear fail. They have seen installation related problems but never a failure of the gear itself, when the gear was properly installed. Installation problems usually involve not checking the installed height of the gear on the dist. shaft and/or not checking the O.D. of the dist. shaft vs. the I.D. of the hole in the gear, to confirm the proper press fit. A correct press fit is critical with poly gears. Also, you cannot drill another set of holes in a poly gear if the first holes were drilled in the wrong location. You either use the existing cross drilled holes or you throw it away but you can't drill another set of holes 90 degrees from the existing holes, like you can with a steel, iron or brass gear.

9/26/1512:02 PM

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