| Also known as | E6864 |
| Diagram | Fig. 1 — CRANKSHAFT AND CONNECTING RODS · ref 14 |
| Subsystem | engine bottom |
| Listed in parts books | 1967–1968, 1970–1971 |
Taper compression ring
A taper-faced compression ring for the piston ring pack, catalog part 70-6864 (alias E6864).
70-6864 is a taper compression ring, the type of piston ring shown in the catalog under CRANKSHAFT AND CONNECTING RODS. It's part of the ring pack that seals the piston to the cylinder bore, riding in one of the piston's ring grooves to hold combustion pressure above the piston while letting the piston slide freely on the down stroke.
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The old book alias for this one is E6864, so if you're working from an older parts list and see that number, it's the same physical part. Catalog appearances for this part number run from 1967 to 1971.
Rings like this get replaced as a set when an engine is rebored or rebuilt, since running a single new ring against worn old ones defeats the purpose. Give us a call if you're not sure which size or oversize you need for your bore.
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