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MOTRS

EH / EJ

1962-1965 / Sedan / Australia

Common Engine, Red Motor (149ci and 179ci)

Rear Main Seal Oil Leak

Symptoms

Oil drips from the bellhousing area. Oil accumulates on the underside of the engine and gearbox. Oil spots on the garage floor.

Cause

The Red Motor uses a two-piece rope-style rear main seal that hardens and shrinks over time. This seal design is inherently less effective than the lip seals used on modern engines. Every Red Motor with more than a few years on the clock will weep from the rear main to some degree.

Fix

Replacing the rear main seal requires either removing the engine or dropping the sump and rear main cap.

The seal itself is cheap ($20-40).

Labour is the expense, budget $500-800 at a workshop.

Many owners live with a slow rear main seal leak and just keep the oil topped up.

If the leak is significant (more than a spot on the ground overnight), it should be addressed.

Cost mentioned in fix
$20-40budget $500-800

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