Parts for your 2014 Holden Commodore-Oil cap

2014 Holden Commodore Oil Cap

Yes, the 2014 Holden Commodore uses an oil cap. Technical sources that detail this include the Holden VF Commodore Owner’s Handbook (MY14) under Engine Oil/Lubrication, and GM Holden Service Information for the VF (Engine Mechanical sections for the 3.6L V6 LFX/LLT and 6.0L V8 L77). These documents show a screw-on oil filler cap located on the rocker/engine cover, complete with a sealing O-ring and oil grade markings.

On a 2014 Commodore, the oil cap is a straightforward bit of kit with an important job. It seals the engine’s oil filler opening to keep oil in, grime and moisture out, and crankcase ventilation behaving as it should. A tight, intact cap helps maintain the slight vacuum the PCV system relies on, which supports smooth idling and keeps oil vapour where it belongs. Most genuine caps also display the recommended oil spec noted in the handbook (often dexos1-approved oil for petrol models), acting as a handy reminder during top-ups.

Positioned on the rocker cover (visible once the bonnet’s up and any decorative engine cover is lifted off or worked around), the cap is a quick twist to remove and refit. For servicing, it’s worth a look every time the oil’s changed—typically at 15,000 km or 12 months, depending on conditions. A light wipe of the filler neck before refitting stops grit entering the engine. Hand-tight is the go, no tools, no overdoing it.

Because heat cycles harden rubber over time, the cap’s O-ring can flatten or crack. When that happens, a faint oil mist may appear around the filler, or there may be a whiff of oil after a drive. Replacing the cap (or just the seal if available) is inexpensive insurance. Stick with a genuine Holden/GM or quality aftermarket cap that matches the VF’s engine code to ensure the seal profile and thread are spot on.

• Time to replace if: the cap’s cracked, the O-ring is perished or flat, there’s oil staining or mist at the filler, or the cap won’t tighten snugly.

1. Let the engine cool, wipe around the filler.
2. Unscrew the old cap, inspect the O-ring.
3. Lightly oil the new O-ring, screw on by hand until snug—no dramas.

Popular questions about 2014 Holden Commodore oil caps

Where is the oil cap on a 2014 Holden Commodore?
It’s on the top of the engine, threaded into the rocker/engine cover. On V6 and V8 petrol models, it’s easy to spot once the bonnet’s open—look for the oil can symbol. Some variants have a plastic engine cover that may need a gentle lift to see the cap clearly.

What oil cap fits a 2014 VF Commodore?
Use a cap specified for the VF’s engine code (3.6L V6 LFX/LLT or 6.0L V8 L77). Genuine GM/Holden or ACDelco caps are a safe bet, common GM part numbers used on similar engines include 12625031 and 12574294, but owners should confirm by VIN to make sure the seal and thread match.

Is it safe to drive without an oil cap?
No. A missing or loose cap can spray oil under the bonnet, draw dirt into the engine, upset crankcase ventilation, and cause rough running. If the cap’s gone missing, fit a correct replacement before driving any distance.