Parts for your 2007 Holden Commodore-Head gasket

2007 Holden Commodore head gasket — what it is, what it does, and when to replace it

For a 2007 Holden Commodore (VE series), a head gasket is absolutely used and relevant. Technical references including the Holden VE Commodore Workshop Manual (GMH Service Information) and GM Powertrain service manuals for the 3.6‑litre Alloytec V6 (LY7/LE0) and 6.0‑litre V8 (L98/L76) list detailed head gasket replacement procedures, torque‑to‑yield head bolt specs, and tightening sequences. Those factory documents confirm these engines use multi‑layer steel (MLS) head gaskets as a critical sealing component.

The head gasket’s job is to securely seal the combustion chambers while keeping engine oil and coolant in their own passages. On the VE’s Alloytec V6 and Gen IV V8, the MLS gasket handles big heat cycles and expansion, maintaining compression and preventing oil‑coolant cross‑contamination. It’s the thin but mighty barrier that keeps the engine efficient, quiet, and reliable.

There’s no scheduled replacement interval for a head gasket, it’s replaced when there’s evidence of failure or while addressing related top‑end work. Keeping the cooling system healthy is the best “maintenance” for the gasket. That means using the correct long‑life OAT coolant, maintaining the proper mix, replacing coolant at the recommended interval, ensuring the radiator and thermostat are in good nick, and never ignoring an overheat. Heat is the head gasket’s worst enemy.

Common warning signs include:

• Unexplained coolant loss, overheating, or pressurised hoses when cold
• White steam from the exhaust, especially on warm start
• Milky, coffee‑coloured residue under the oil cap or in the sump
• Rough running, misfires on start‑up, or sweet smell from the exhaust

If replacement is needed, it’s a fairly involved job. The cylinder head(s) must come off, the surfaces checked for flatness, and new torque‑to‑yield head bolts fitted along with a quality MLS gasket set. The workshop will follow the factory tightening sequence and angle specs, inspect timing components, replace intake/exhaust gaskets, change engine oil and coolant, and bleed the cooling system. Skimming of the head is only done within manufacturer limits. It’s wise to use OEM‑grade parts and follow Holden/GM specs to the letter.

Done properly by a competent mechanic, a fresh head gasket on a VE Commodore restores compression, stops leaks, and sets the engine up for many more easy kilometres.

FAQs

What are the typical symptoms of a blown head gasket on a 2007 VE Commodore?
Owners usually notice overheating, coolant loss, white exhaust steam, or contaminated oil. Some cars develop a misfire on start, pressurised cooling system when cold, or constant bubbling in the overflow. A cooling system pressure test and combustion leak (block) test are the quickest ways to confirm.

How much does head gasket replacement cost in Australia or New Zealand?
Costs vary with engine (V6 vs V8), parts quality, and any machine work. As a ballpark, expect a substantial labour bill, often a full day or two in the workshop. Pricing is best confirmed with a quote that includes bolts, gasket set, fluids, machining (if required), and any “while you’re in there” items.

Can a stop‑leak product fix a head gasket on a VE?
Stop‑leak can sometimes mask a minor seep briefly, but it’s not a proper repair and can create other problems in radiators and heater cores. For a durable fix on a Commodore, the correct remedy is diagnosis followed by gasket replacement to factory procedure if a failure is confirmed.