| Diagram | Fig. 4 — CYLINDER BLOCK AND HEAD, TR6R, TR6C · ref 18 |
| Subsystem | engine top |
| Listed in parts books | 1971 |
Split cotter
A split cotter listed in the cylinder block and head parts for the TR6R/TR6C, later superseded by 71-3748.
This is a split cotter, a small hardware piece that shows up in the cylinder block and head catalog listing for the TR6R and TR6C. Split cotters like this one are used to lock a component in place on a shaft or pin so it can't work loose under vibration - a simple wedge-and-groove fastener rather than a nut or clip.
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Our catalog record only shows this number appearing once, tied to the 1971 model year listing for the TR6R and TR6C. It was later superseded by factory number 71-3748, so if you're working from a parts book or an old order that references 99-0063, that's the same physical piece under its later number.
We don't have more detail on this one beyond what's in the cylinder block and head figure. If you're not sure this is the right cotter for your engine, call the shop and we'll confirm before you order.
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