| Also known as | E6387 |
| Diagram | Fig. 10 — TIMING COVER AND CONTACT BREAKER · ref 4 |
| Subsystem | engine bottom |
| Listed in parts books | 1967–1968, 1970–1971, 1974, 1976–1980, 1983, 1985 |
OIL SEAL - .020 TIMING SIDE CRANK FEED
Oversize (.020) oil seal for the timing side crank feed, for crankcases bored oversize on that side.
70-6387 is an oil seal for the timing side of the crankcase, sized .020 over standard to match a crankcase that's been bored oversize for the crank feed. It sits in the timing cover area, part of the system that keeps oil where it belongs as it feeds through to the crank on the timing side. The legacy form of this part shows up in older parts books as E6387, same physical seal, different number.
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Because this is an oversize seal rather than a standard one, it's meant for a case that's already been machined .020 over — not a drop-in substitute for a standard seal. If you don't know whether your timing side has been bored oversize, it's worth checking before you order this one instead of the standard-size seal.
This PN turns up across a long run of catalog entries, spanning from the late '60s into 1980, so it's been a consistent listing over the unit-twin production years. Give us a call if you want to double check which seal size your engine needs before ordering.
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