Parts for your 2012 Holden Captiva 5-Sump plug washers

2012 Holden Captiva 5 sump plug washers — what they do and when to replace

For the 2012 Holden Captiva 5, a sump plug washer is absolutely used and relevant. Holden/GM Service Information for the CG Series II Captiva 5 (Engine Mechanical – Lubrication, Engine Oil and Filter Replacement) specifies fitting a new drain plug gasket at oil change, and the Holden Electronic Parts Catalogue lists an M14 drain plug with a separate sealing washer for the 2.4‑litre petrol engine. ACDelco/GM parts listings for CG/Antara applications likewise show an aluminium crush washer paired with the sump plug. That’s the technical way of saying: yes, it runs a washer, and it’s there for a good reason.

The sump plug washer is the sealing hero between the drain bolt and the alloy sump. It crushes slightly when tightened, filling tiny imperfections so oil can’t seep out. On Captiva 5 it’s typically an M14 aluminium or copper crush type, though some genuine plugs come with a bonded seal. Either way, the sealing element is consumable and should be renewed as part of each service — quick, cheap insurance against annoying drips on the driveway.

Best practice on a Captiva 5 oil change is simple: swap the washer, clean the mating face on the sump, install the plug by hand to avoid cross‑threading, then torque it correctly. GM procedure targets around 25 N·m for the M14 drain plug on this platform. Nipping it “just a bit more” is a fast track to a deformed washer or damaged threads, so a torque wrench is worth the effort.

Owners who service at home should keep a small pack of 14 mm ID crush washers (typically ~20 mm OD, ~1.5–2.0 mm thick) on the shelf. Don’t stack old washers, don’t reuse a gouged or flattened one, and don’t fit sealant on the threads — the washer is the seal. After the first heat cycle, a light weep around the plug is a sign the washer wasn’t replaced or the plug isn’t torqued correctly.

Why replace every time? The metal work-hardens once crushed, so it won’t conform the same way again. Given the low cost versus the hassle of cleaning leaks, topping up oil, or redoing the job, a fresh washer each service is the sensible Aussie/Kiwi way.

• Replace the washer at every oil change.
• Clean the sump face, hand-start the plug.
• Tighten to about 25 N·m — no gorilla grips needed.

What size washer does a 2012 Captiva 5 use?

It uses an M14 sump plug washer. Most aftermarket listings for CG Series II specify an aluminium or copper crush washer with ~14 mm inner diameter (about 20 mm outer diameter, 1.5–2.0 mm thick). If buying genuine, the washer is supplied for the M14 plug used on the 2.4‑litre petrol Captiva 5.

Can the old washer be reused?

It can be, but it shouldn’t be. Once crushed, the washer hardens and won’t seal as reliably the second time. Reusing is a common cause of weeping around the drain plug after a service. Swapping in a new washer each oil change is the easiest way to avoid leaks.

How tight should the sump plug be?

For the Captiva 5’s M14 plug, aim for roughly 25 N·m with a torque wrench. That’s firm, not brutal. Over‑tightening can distort the washer or damage the sump threads, under‑tightening can allow a slow leak. If a torque wrench isn’t handy, seat the plug, then add a modest nip — but use a torque wrench when you can.