Parts for your 2005 Holden Commodore-Engine mount

2005 Holden Commodore engine mount — purpose, service and replacement

Technical sources such as the Holden VZ Service/Workshop Manual (2004–2006), GM Service Information (SI), the Holden Electronic Parts Catalogue, and major parts catalogues from Mackay Rubber/Kelpro all list left and right engine mounting insulators for 2005 VZ Commodore models (3.6L Alloytec V6 and 5.7L/6.0L V8). That confirms an engine mount is absolutely used and relevant on a 2005 Holden Commodore.

On a 2005 Commodore, the engine mounts secure the engine to the front subframe while isolating vibration and controlling engine movement under torque. Most variants use rubber or fluid-filled (hydraulic) mounts to keep NVH low, which is why a tidy Commodore feels smooth at idle and doesn’t thunk on take-off. They also help protect hoses, exhaust joints and driveline components by limiting how far the engine can rock about.

Typical warning signs of tired mounts include a droney or buzzy idle in Drive, a clunk when shifting from Reverse to Drive, noticeable engine rock when blipping the throttle, or visible sagging/cracking of the rubber. Some hydraulic mounts can weep fluid, that’s a dead giveaway they’re done. Because movement up front affects everything down the line, it’s smart to check the transmission mount at the same time.

As part of regular servicing, a quick visual and pry-bar check every 20,000–30,000 km is sensible, with closer attention if the car tows, runs stiffer exhausts, or sees spirited driving. Replacement is straightforward for a trained tech: support the engine from above or with a block on the crossmember (never on the sump), replace mounts in pairs when practical, and torque fasteners to spec from the workshop manual with the engine at normal ride height. After fitting, confirm clearance around the steering rack, headers and exhaust, and recheck fastener torque after a few hundred kays. Fresh mounts can transform the Commodore’s refinement and stop-start smoothness, so they’re a worthwhile fix when symptoms appear.

• Key symptoms: harsh idle, clunk on gear engagement, excess engine movement, fluid leak from mount.
• Service tips: inspect each service, replace in pairs, verify torque specs, check trans mount and exhaust clearances.

Popular questions

How long do engine mounts last on a 2005 Commodore?
In normal Aussie and Kiwi commuting, mounts often last 120,000–200,000 km. Heat, oil contamination, towing, and spirited driving can shorten that window. If vibration creeps in at idle or there’s a thunk on take-off, it’s time to inspect rather than wait for a hard failure.

Is it okay to keep driving with a failed engine mount?
You can usually limp it, but it’s not a great idea. Excess movement can stress exhaust flex joints, hoses and the transmission mount, and it can add harshness to the cabin. Get it inspected promptly to avoid knock-on repairs.

Are V6 and V8 VZ Commodore engine mounts the same?
They’re not universally interchangeable. The Holden EPC and parts catalogues specify different left/right mounts for various engines and trims. Always match the mount to the exact VIN/engine code to get the correct load rating and bracket geometry.