11 Tooth starter and 164 tooth flexplate 1985 F150
I have a 1985 F150 an I've replaced the 11 tooth starter 8 times and the 164 tooth flex plate 4 times why does it keep grinding when I start it?
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@jbodnar , You will have to confirm your replacement flywheel and starters are matching the OEM parts that came with your truck( because dimensions,tolerances, materials can differ from aftermarket parts and OEM),
Best not to put a new starter on worn worn ring gear(flexplate) and vise versa, can cause premature wear.
Found this write up at another sight. -by mrreman.com via web.archive.org
Ford 2 bolt type, Shims needed due to worn thrust bearings in engine; "...This condition is the result of the drive engaging too deeply into the flywheel. The face of the drive is rubbing on the flywheel and gradually cutting into the cover that holds the drive together. Eventually, it cuts through and the drive comes apart. The damage is not caused by a problem with the starter. It is because the flywheel is floating as a result of worn thrust bearings, located inside the engine block, whose function is to keep the crankshaft centered. This wear can be enough to cause starter and ring gear engagement problems on an engine with 60,000 or more miles. It might take a long time to destroy the original starter, but when a new unit is installed, the drive can be quickly destroyed. Therefore, it is important to properly diagnose this problem when inspecting the customers original core rather than providing him a replacement unit. Shims are availalbe from OCA, part number F.S.S.2B
Check the attached links,instruction and guides, Good luck.
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@jbodnar what do you mean by grinding? what engine size does your F-150 have? You replaced those parts because of the noise or is it binding and not starting properly? Wherer did you get the parts and would you have the parts number for those?
by oldturkey03