Parts for your 2017 Holden Commodore-Manifold gasket

2017 Holden Commodore manifold gasket — what it does and when to replace it

A manifold gasket is absolutely used on the 2017 Holden Commodore. Both the V6 (LFX) and V8 (LS3) petrol engines in the VF Series II run intake manifold gaskets and exhaust manifold gaskets. Technical sources that confirm this include Holden/GM Service Information (VF Series II, Engine Mechanical sections for LFX and LS3), the ACDelco GM OE gasket applications for VF Commodore, and major aftermarket catalogues such as Fel‑Pro that list intake and exhaust manifold gaskets for 2017 Commodore variants.

On this Commodore, the intake manifold gasket seals the join between the plastic intake manifold and the alloy cylinder heads, keeping unmetered air out so the engine control system can manage fuel properly. The exhaust manifold gasket seals hot gases as they leave the head and enter the exhaust, preventing ticking noises, under‑bonnet heat leaks, and oxygen sensor confusion. Together, these gaskets help maintain smooth idle, decent fuel economy, clean emissions, and that effortless Commodore drive people expect.

These gaskets aren’t a routine “every X kilometres” service item, they’re inspected and replaced if disturbed or if there are symptoms of leakage. When servicing a 2017 Commodore, a savvy tech will:

• Check for intake leaks if there’s a rough idle, whistle/hiss, poor economy, or lean codes (P0171/P0174).
• Listen for an exhaust tick on cold start, look for sooty marks around the manifold, or smell fumes under load.
• Smoke‑test the intake if unsure, and verify manifold bolt torque to spec if access allows.

If replacement is needed, best practice is to fit new OEM‑quality gaskets, clean the mating faces, and follow the specified tightening pattern and torque from GM SI. Intake manifold gaskets on the LFX/LS3 are moulded rubber or port‑style seals that should not be slathered with sealant, they rely on proper clamping. Exhaust manifold gaskets are typically multi‑layer steel and should be renewed whenever the manifold is off. It’s also smart to replace any single‑use fasteners and the throttle body gasket if it’s removed.

A competent workshop will allow roughly 1–3 hours depending on engine and access. Driving with a leaking intake gasket risks lean running and misfires, with an exhaust leak, expect noise, possible catalyst issues from false O2 readings, and hot gas in the engine bay. Sorting it early keeps the Commodore happy and your wallet calmer.

Popular questions about the 2017 Holden Commodore manifold gasket

Does the 2017 Commodore have both intake and exhaust manifold gaskets?
Yes. VF Series II petrol models (LFX V6 and LS3 V8) use intake manifold gaskets to seal incoming air and exhaust manifold gaskets to seal outgoing gases. Both are serviceable components listed in Holden/GM SI and ACDelco parts catalogues.

How often should manifold gaskets be replaced on a 2017 Commodore?
There’s no fixed interval. Replace them when they’re leaking, when manifolds are removed, or if diagnostics point to a seal issue. Always follow GM torque specs and patterns on reassembly.

Is it safe to drive with a leaking manifold gasket?
Not ideal. An intake leak can cause rough running and potential catalyst damage from lean combustion. An exhaust leak can draw in fresh air and skew O2 sensor readings, hurt economy, and push hot gases into the bay. Best to fix promptly.