| Diagram | Fig. 3 — Engine: Contact Breaker, Timing Cover, Oil Pump, Oil Pressure Relief Valve · ref 26 |
| Subsystem | engine bottom |
| Listed in parts books | 1975 |
Norton Key, Worm Gear
A locating key for the oil pump worm gear drive in the engine bottom end.
This is a small key that locates the worm gear on the oil pump drive down in the engine bottom end. It's the kind of part nobody thinks about until the pump drive starts slipping or making noise, and then it's the first thing to check.
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The catalog places it with the timing cover, contact breaker, oil pump, and oil pressure relief valve group, so it lives in that cluster of parts behind the timing cover where the oil pump gets its drive. It's a small piece but it's doing real work keeping the pump gear indexed on its shaft.
Our record only shows this part turning up once in the catalogs, tied to 1975, so we don't have a broad fitment history to draw on here. If you're matching this up to an engine outside that year, give us a call and we'll confirm before you order.
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