2026-10-08 · 5 min read
Subaru Forester Oil Leak Malaysia — BOXER Engine
Forester BOXER oil leaks: cam seals (front and rear — BOXER has 4 cam seals), valve cover gaskets, front crankshaft seal. SJ FB20: head gasket is NOT a known issue (unlike EJ engines). Rear main seal at 100,000+ km. Malaysia repair. BOXER: oil leak inspection differs from inline — leaks can collect at bottom of engine.
Subaru Forester Oil Leak
- Forester common oil leak points: rocker cover gaskets (most common on FB25 over 100,000 km), front crankshaft oil seal, rear crankshaft oil seal, and oil pan gasket; boxer engine has 4 rocker covers — two per bank
- Forester rocker gasket leak: FB25 rocker cover gaskets harden with age and heat — common at 100,000–120,000 km; small leak drips onto hot exhaust; smell of burning oil is first sign; replace both left and right bank covers together
- Forester front crank seal: front crankshaft seal leak usually appears as oil stain on lower front of engine behind harmonic balancer; replace when doing timing service or if visible leak; seal replacement is straightforward on FB25
- Forester oil leak inspection: clean the engine bay with degreaser; then run engine for 15 minutes; re-inspect to find leak origin by fresh wet oil trail; this method identifies exact leak point without guessing