| Also known as | 18-89300P, E6863 |
| Diagram | Fig. 1 — CRANKSHAFT AND CONNECTING RODS · ref 16 |
| Subsystem | engine bottom |
| Listed in parts books | 1967–1968 |
Gudgeon pin (long)
Long gudgeon (wrist) pin joining piston to connecting rod small end, catalog number 70-6863.
70-6863 is the long-style gudgeon pin that connects the piston to the small end of the connecting rod. It shows up in the catalog under the CRANKSHAFT AND CONNECTING RODS figure, which tells you where it lives in the bottom end - riding inside the piston bore and the rod's small end bushing, letting the piston rock back and forth as the rod does its work.
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This is the "long" version of the pin, distinct from other gudgeon pins in the parts books that are cut shorter for different applications. It also carries an older E-prefix number, E6863, alongside a service-replacement form, 18-89300P - all three point to the same physical part across different catalog printings.
Our records show this one turning up across catalog entries from the late 1960s. If you're rebuilding a bottom end and pulling pistons, it's worth checking this pin for wear and scoring along with the rest of the small-end hardware rather than assuming it's fine because the rest of the kit looks good.
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