| Also known as | E3959 |
| Diagram | Fig. 1 — CRANKSHAFT, PISTON AND TIMING GEARS · ref 18 |
| Subsystem | engine bottom |
| Listed in parts books | 1963–1964 |
Compression ring
A compression piston ring, PN 70-3959 (alias E3959), listed in the crankshaft/piston/timing gear section of the parts book.
This is a compression ring, catalog number 70-3959, also listed under the older E3959 designation. It shows up in the parts-book section covering the crankshaft, piston, and timing gears, which tells us it's a piston ring rather than anything from the top end's valve gear.
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Beyond that, the catalog entry doesn't give us much more to go on - no material, size, or specific model callout comes through in our records. The listing spans catalog appearances from 1963 to 1964, but we can't tie it to a specific model or engine size from what's on file.
If you're chasing a ring for a rebuild, give the shop a call with your engine's details and we'll confirm this is the right one before you order.
We've never carried this one. Tell us what you're after and we'll go looking — you'll get a price and photos before you commit to anything.
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