Parts for your 2009 Ford Territory-Head gasket

2009 Ford Territory head gasket — what it does and how to look after it

For the 2009 Ford Territory (SY/SY II, 4.0‑litre Barra inline‑six), a head gasket is absolutely fitted and relevant. Technical references including the Ford Territory SY/SY II Workshop Manual, Ford’s Microcat parts catalogue, and Australian gasket makers’ catalogues (Permaseal/ACL listings for the 4.0‑litre Barra) all specify a multi‑layer steel (MLS) cylinder head gasket and torque‑to‑yield head bolts for this engine.

The head gasket lives between the aluminium cylinder head and the cast‑iron block. Its job is to seal combustion pressure, coolant passages, and oil galleries so the engine runs cleanly and efficiently. On the Barra I6, the MLS design copes well with heat cycles and high cylinder pressures, provided the cooling system is kept in top nick.

Keeping a 2009 Territory happy largely comes down to cooling system maintenance. Fresh, correct‑spec coolant, a sound radiator cap, tidy hoses, and a working thermostat help prevent hot spots that can stress the gasket. During regular servicing, it’s smart to check for early warning signs:

• Unexplained coolant loss or pressure in the expansion tank after a cold start
• White steam from the exhaust once warm, or a sweet smell
• Milky residue under the oil filler cap or on the dipstick
• Misfire on start‑up, rough idle, or overheating

If replacement is on the cards, it’s a precision job. The head and block faces should be cleaned carefully and checked with a straightedge, any warpage must be addressed to factory specs. Always use a quality MLS gasket set, replace the torque‑to‑yield head bolts, and follow the Ford torque sequence and angle stages from the workshop manual. On the DOHC Barra, timing chain handling, cam alignment, and re‑timing require proper locking tools and procedure — not one to wing under the carport without the right gear.

Post‑repair, bleed the cooling system properly, fit new coolant to the correct spec, and recheck for leaks after the first few heat cycles. From there, keep to sensible intervals: coolant changes on time, keep an eye on temperatures under load (towing or hot summer climbs), and don’t ignore small leaks. Look after the cooling system and the Territory’s head gasket typically gives long, drama‑free service.

What are common signs of a failing head gasket on a 2009 Territory?

Look for coolant loss with no obvious external leak, bubbling in the expansion tank, overheating, white exhaust steam after warm‑up, milky oil, or a persistent misfire on start‑up. A cooling‑system chemical test for combustion gases is an easy way to confirm suspicions.

Will a bottle of sealer fix a leaking head gasket?

Sealants are a temporary band‑aid at best and can clog heater cores and radiators. For a reliable fix on the Barra I6, the proper repair is gasket replacement, head/block surface checks, new head bolts, and following the correct torque procedure.

How much does a head gasket replacement typically cost in AU/NZ?

Costs vary with machine work and parts quality, but as a ballpark: AU$2,000–$3,500 or NZ$2,200–$3,800 at a professional workshop. Expect more if the head needs machining, valves need attention, or the cooling system gets refreshed at the same time.