2026-10-08 · 5 min read
Subaru Forester Valve Cover Gasket Malaysia — BOXER
Forester FB20 valve cover gaskets: BOXER has two cylinder heads — two valve covers, each with its own gasket. Oil seepage at 80,000–120,000 km. Malaysia replacement (both sides). BOXER: cover access requires more space — labour cost slightly higher than inline engines.
Subaru Forester Rocker Cover Gasket
- Forester rocker gasket: valve cover gasket (VCG) on FB25 commonly leaks at 80,000–100,000 km; oil seeps along valve cover edge, drops onto exhaust manifold; burnt oil smell from engine bay; oily residue around cam cover perimeter
- Forester rocker gasket diagnosis: look for brown oily residue on outside of valve cover; oil on exhaust manifold burns off causing intermittent smoke when hot; oil level may drop slowly; diagnose by cleaning area and rechecking after 500 km
- Forester rocker gasket replacement: straightforward on FB25 — remove coil pack cover, remove spark plug coils, remove valve cover bolts; clean mating surfaces; fit new gasket (OEM or Ajusa/Mahle quality); torque to spec; do not overtighten
- Forester spark plugs at rocker gasket: FB25 spark plug tube seals also found at valve cover — if oil found in spark plug tube (looks like oil in plug well), plug tube seal is leaking; replace spark plug tube seals at same time as valve cover gasket — already disassembled