Parts for your 2015 Holden Colorado-Engine mount

2015 Holden Colorado Engine Mounts — What They Do and When to Replace Them

Yes, an engine mount is absolutely relevant and fitted to the 2015 Holden Colorado (RG). Technical documentation confirms it: the Holden Colorado RG Workshop Manual (2012–2016, Engine Mechanical – Engine Mounting) details left- and right-hand engine mounting insulators and associated fasteners, and the GM Global Electronic Parts Catalogue for MY15 Colorado lists the front engine mount assemblies. The platform-sharing Isuzu D‑Max service literature also describes the same two side mounts supporting the engine, with the transmission mount managing the rear of the drivetrain. So, engine mounts are very much part of this ute’s setup.

In the Colorado, the engine mounts do two big jobs: they hold the engine securely to the chassis, and they soak up vibration so the cabin doesn’t shake like a paint mixer. With the torquey 2.8‑litre turbo-diesel, quality mounts make a huge difference to idle smoothness, take-off refinement, and how tidy everything feels over corrugations. Most are rubber or hydraulic (fluid-filled) to damp harshness while still keeping the driveline properly located for gear changes and throttle response.

• Common signs a mount’s on the way out:
  • Noticeable vibration at idle or through the steering wheel
  • Clunks on take-off, shifting, or when backing off the throttle
  • Excess engine movement under the bonnet
  • Perished, cracked rubber or fluid weeping from a hydraulic mount
  • New exhaust or driveline resonance that wasn’t there before

Engine mounts aren’t a fixed-interval service item, but they’re worth a look at each major service from about 100,000 km, especially if the vehicle tows, carries a canopy or bull bar, or sees plenty of rough tracks. Many last 150,000–250,000 km, but Aussie and Kiwi conditions can shorten that. When replacing, support the engine properly, follow the RG workshop manual torque specs, and tighten fasteners at normal ride height. Some bolts may be torque‑to‑yield and single‑use, replace them if specified. It’s smart to do mounts in pairs to keep balance and NVH consistent, and to choose OE or quality aftermarket mounts that match the original durometer or hydraulic design.

Done right, fresh mounts bring back that calm idle, stop the driveline shunt, and help protect hoses, exhaust joints, and ancillary brackets from fatigue.

Popular questions

How many engine mounts does a 2015 Holden Colorado have?
It uses two primary engine mounts (left and right) on the crossmember to support the engine, plus a separate transmission mount at the rear to stabilise the driveline. Manuals and autos both use this general layout on the RG platform.

How long do engine mounts typically last on a 2015 Colorado?
Anywhere from around 150,000 to 250,000 km is common, but heavy towing, 4x4 work, and lots of stop‑start can bring that forward. Regular inspections at major services will catch cracking rubber or hydraulic leaks early.

Is it okay to keep driving with a worn engine mount?
It’ll usually still drive, but it’s not ideal. Excess movement can stress exhaust flex joints, hoses, and the transmission mount, and it can escalate vibration that’s hard on accessories. If there are clunks or visible damage, it’s best to sort it promptly.