Oil Cooler O-Ring Leak
Symptoms
Oil leak from the oil cooler housing on the front of the engine, typically dripping down onto the oil filter and undercarriage.
Cause
The O-ring seal between the oil cooler and the engine block hardens with age and heat.
Fix
Replace the O-ring.
The oil cooler assembly unbolts from the front of the block.
Cost: $20 for the O-ring, 1-2 hours of work.
While it's apart, flush the oil cooler core, they can clog with sludge on neglected engines.
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