Parts for your 2007 Ford Falcon-Oil cap

2007 Ford Falcon Oil Cap — Purpose, Care, and When to Replace

According to Ford’s BF Falcon Owner’s Guide (2006–2008) and the Ford Workshop Manual for the Barra 4.0 and Boss 5.4 engines, a dedicated engine oil filler cap is fitted to all 2007 Ford Falcon variants. It sits on the rocker/valve cover under the bonnet, marked with the oil-can symbol and often the recommended viscosity. So yes—an oil cap absolutely applies to the 2007 Falcon.

This small bit of kit does more than just cover the hole. The oil cap seals the filler neck to keep dust, water, and road grime out of the engine, while helping maintain correct crankcase ventilation. On the BF’s petrol and LPG engines, the cap’s seal (usually an O-ring) supports PCV system performance and reduces the chance of oil mist or fumes escaping. During servicing, it’s the access point for topping up or refilling engine oil, so having a snug, undamaged cap is essential for clean, drama-free maintenance.

As part of regular servicing—about every 10,000–15,000 km or 12 months—it's smart to give the oil cap a quick once-over. Wipe off any grime, check the O-ring for hardening, cracks, or flattening, and make sure the cap threads or bayonet tabs aren’t chewed out. Refit the cap hand-tight—no tools—so it seats evenly. If it’s cross-threaded, back it off and try again, a crooked cap can leak or let contaminants in.

Seeing oil dampness or smelling fumes around the cap on a BF can point to a tired seal or a loose fit. Replace the cap if the seal’s damaged or the cap no longer locks positively. If residue returns quickly after fitting a new cap, have the PCV hose and valve checked—excess crankcase pressure can push oil past any seal.

Choosing a replacement? Quality caps designed for BA/BF/FG inline-six engines generally interchange, while Boss 5.4 V8s use a different cap. If in doubt, match the engine family and build year. Don’t drive without a cap—unfiltered air and grit can reach the oil in minutes, risking costly wear.

• Replace the cap if the O-ring is perished, the cap won’t seat, or there’s persistent oil mist.
• Clean around the filler before removal to stop debris dropping into the engine.
• After topping up, run the engine and recheck for weeps around the cap.

Popular questions about 2007 Ford Falcon oil caps

Where is the oil cap on a 2007 Ford Falcon, and what does it look like?
It’s on the top of the rocker/valve cover, easy to spot with the oil-can symbol and often an oil grade note (like 5W-30). On the Barra 4.0 it’s front-and-centre or slightly offset, on the Boss 5.4 V8 it’s on the respective valve cover. Twist to remove, it should seat and lock smoothly when refitted.

Are BA, BF, and FG Falcon oil caps interchangeable?
Most caps for the Barra 4.0 (including turbo and LPG) interchange across BA, BF, and FG. The V8 uses a different cap. Always match by engine family, if an aftermarket listing specifies BA/BF/FG I6 compatibility, it’ll typically fit the 2007 BF inline-six.

Why is there oil around my Falcon’s oil cap after driving?
Likely causes are a worn or hardened O-ring, a cap that’s not seated, or elevated crankcase pressure from a tired PCV valve or hose. Start by replacing the cap or seal, if residue returns, have the PCV system inspected to prevent recurring leaks.