How Long Can a Crankshaft Oil Seal Generally Be Used After It Starts Leaking?

[MacJackson]

Crankshaft oil seals cannot continue to be used once they start leaking and must be replaced promptly. The crankshaft is the most critical component in an engine, bearing the force transmitted by the connecting rod and converting it into torque. Overview: The crankshaft is subjected to the combined effects of centrifugal force from rotating masses, periodically varying gas inertial forces, and reciprocating inertial forces, causing it to bear bending and torsional loads. Therefore, the crankshaft must have sufficient strength and stiffness, with journal surfaces that are wear-resistant, operate uniformly, and maintain good balance. Additional Information: To reduce the mass of the crankshaft and the centrifugal forces generated during operation, crankshaft journals are often designed with a hollow structure. Oil holes are drilled on each journal surface to allow oil to be introduced or discharged for lubricating the journal surfaces. To minimize stress concentration, transition arcs are used to connect the main journals, crankpins, and crank arms.