Oil Leaks
Symptoms
Oil on the engine, oil on the ground, oil smell from the exhaust manifold.
Cause
Every gasket and seal on the A-series hardens and leaks with age. The rear main seal is a scroll-type design that relies on engine oil viscosity to maintain its seal -- it is not a positive seal and will always weep slightly.
Fix
Systematic reseal.
Replace all gaskets and seals.
The rear main seal can only be replaced with the engine out or the gearbox removed.
Full reseal: $150--300 DIY, $500--1,000 at a workshop.
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