Parts for your 2014 Holden Commodore-Manifold gasket

2014 Holden Commodore manifold-gasket: what it does and when to replace it

Yes, a manifold gasket is absolutely used on the 2014 Holden Commodore. Both the LFX 3.6 V6 and the L77 6.0 V8 fitted to VF models use intake manifold-to-head gaskets and exhaust manifold-to-head gaskets. This is confirmed by Holden/GM Global Service Information (VF Commodore Service Manual, Engine Mechanical – Intake and Exhaust Manifold procedures) and the Holden Genuine Parts/ACDelco catalogues that list the respective manifold gasket sets for these engines.

The manifold gasket’s job is simple but critical. On the intake side, it seals the join between the manifold and the cylinder heads so only metered air makes it into the engine. That keeps idle smooth, fuel trims happy, and cold starts crisp. On the exhaust side, the gasket contains hot gases as they leave the head, stopping that tell-tale ticking on cold start, preventing fumes sneaking into the cabin, and ensuring the oxygen sensors get clean, consistent readings.

Materials vary by location: the intake typically uses moulded rubber or composite seals that sit in the manifold runners, while the exhaust side uses multi-layer steel or high-temp composite gaskets to cope with heat cycling. There’s no fixed service interval for manifold gaskets on a VF Commodore, but smart servicing includes a check for leaks any time the engine’s in for a tune-up or when the manifold has been disturbed. Most technicians replace exhaust manifold gaskets once removed. Intake manifold seals on the LFX can sometimes be reused if undamaged, but given the low cost and the hassle of chasing vacuum leaks, many workshops just fit new seals on reassembly.

If there’s a whistling or hissing at idle, a rough idle with lean codes (often P0171/P0174), or fuel trims that won’t settle, think intake gasket. If there’s a ticking noise that quietens as it warms, soot marks at the flange, or a whiff of exhaust under load, think exhaust gasket.

• When replacing: clean mating faces, check manifolds for warpage, and follow the GM torque and tightening sequence from the VF Service Manual.
• Use new exhaust manifold nuts/studs where specified by GM SI, and avoid sealants unless the factory procedure calls for them.
• Aftermarket or genuine? Either is fine if it meets OE spec, quality matters more than branding.

Technical sources referenced: Holden VF Commodore Service Manual (GM Global SI: Engine Mechanical – Intake/Exhaust Manifold Replacement for LFX V6 and L77 V8) and Holden/ACDelco genuine parts catalogues listing intake and exhaust manifold gasket sets for VF.

Popular question: Does the 2014 Holden Commodore definitely have both intake and exhaust manifold gaskets?

Yes. Factory service procedures for VF LFX V6 and L77 V8 explicitly show gaskets at the intake-to-head and exhaust-to-head interfaces. They’re required for proper sealing and emissions performance.

Popular question: What are the common signs of a crook manifold gasket on a VF Commodore?

Intake leaks usually cause hissing, a rough or high idle, and lean fault codes. Exhaust leaks tend to tick on cold start, leave faint soot trails, and can trigger O2 sensor faults or a louder note under load.

Popular question: Should the gaskets be replaced every time the manifold comes off?

Exhaust gaskets: generally yes, along with any single-use fasteners specified by GM SI. Intake seals may be reusable if perfect, but most techs replace them to avoid do-overs. Always torque to factory specs in the correct sequence.