Parts for your 2014 Subaru Forester-Sump plug washers

2014 Subaru Forester sump plug washer — what it is and why it matters

Based on Subaru’s factory guidance, the 2014 Subaru Forester does use a sump plug washer (also called an oil drain plug gasket). The Subaru Forester (SJ, MY2014) Engine Lubrication section of the Subaru Service Manual specifies replacing the oil drain plug gasket at each engine oil change and tightening the plug to the specified torque. The 2014 Forester Owner’s Manual also notes that the drain plug gasket should be renewed during oil changes. Subaru’s parts catalogue for SJ-series Forester lists an OEM aluminium crush-type drain plug gasket for FB-series engines. Together, these technical sources confirm the sump plug washer is fitted and a service item on the 2014 Forester. Typical drain plug torque is around 44 N·m (about 32–33 ft‑lb), applied with a new crush washer.

On a 2014 Subaru Forester, the sump plug washer is a small, single-use aluminium ring that does a big job. When the drain plug is tightened, the soft alloy washer deforms to match the mating faces, sealing the sump so engine oil can’t seep out under heat and vibration. It also lets the plug reach the correct torque without chewing into the alloy sump, which helps protect the threads for the long haul.

Servicing is straightforward: the washer is designed to be replaced every oil change. Subaru calls for a new crush gasket each time the plug is removed. Reusing an old one risks minor weeping at first, then messy drips on the driveway. Worse, chasing a leak by overtightening can crack the sump or stretch the plug threads — not the sort of weekend anyone in Australia or New Zealand is after.

Stick with an OEM-spec aluminium crush washer sized for the Forester’s factory drain plug. Many aftermarket options work fine, but they must match the plug’s shank and seat. If in doubt, match by VIN or take the old washer to the counter for a like-for-like. Copper washers exist, but Subaru designs this engine family around soft aluminium crush types.

A few quick tips owners appreciate:

• Replace the washer at every oil change per the service schedule.
• Clean the sump seat and plug face before refitting.
• Tighten the drain plug to about 44 N·m with a torque wrench.
• Don’t stack washers and don’t reuse them.
• If a non-OEM plug is fitted, confirm washer style and size before servicing.

Done right, a fresh sump plug washer keeps the Forester’s FB engine sealed, tidy and happy between services, whether it’s tackling long Kiwi kilometres or Aussie heat.

FAQs

Does a 2014 Subaru Forester need a new sump plug washer at every oil change?
Yes. Subaru’s servicing information specifies replacing the crush washer each time the drain plug is removed. It’s a single-use seal that deforms once, so fitting a new one helps prevent weeps and lets the plug be torqued correctly without over-tightening.

What is the correct torque for the 2014 Forester’s sump plug?
The factory spec is about 44 N·m (roughly 32–33 ft‑lb) with a new aluminium crush washer installed. Using a torque wrench is the best way to protect the sump threads and ensure a proper seal.

Can a different washer material be used instead of aluminium?
Subaru designs the Forester’s drain plug to work with an aluminium crush gasket. Other materials (like copper, fibre or rubber-bonded) may not crush or seal the same, and can change the required torque. For reliability, stick with an OEM-style aluminium washer matched to the original drain plug.