Parts for your 2017 Holden Colorado-Exhaust gasket

2017 Holden Colorado exhaust-gasket: what it does, where it is, and when to replace it

Technical references confirm the 2017 Holden Colorado does use exhaust-gaskets at key joints. The Holden RG Colorado Service Manual (GM SI, Engine/Exhaust, 2017 model year) specifies replacing the cylinder head–to–exhaust manifold gasket during removal/refit, and the GM Global EPC lists sealing rings/gaskets at the turbocharger outlet to front pipe and other exhaust flanges. These are also reflected in the ACDelco Genuine GM Parts catalogue for RG Colorado exhaust components. So an exhaust-gasket is absolutely relevant on this model.

On the 2017 Holden Colorado 2.8‑litre turbo‑diesel, the exhaust-gasket quietly does the heavy lifting. It seals ultra‑hot gases as they exit the head, run through the manifold and turbo, then on to the front pipe, DPF and tailpipe. A good seal means no soot leaks, no chuffing noises on cold start, stable boost, happier DPF regens, and no exhaust smell sneaking into the cabin.

Typical spots you’ll find exhaust-gaskets on this ute include:

• Exhaust manifold to cylinder head gasket
• Turbocharger to manifold and turbo outlet to front pipe sealing ring/gasket
• Front pipe and other flange joints (crush rings or flat gaskets, depending on build)

There’s no set replacement interval, they’re changed when disturbed or when symptoms appear. During routine servicing or after any exhaust/turbo work, a quick inspection goes a long way. Look for black soot marks at joints, listen for a ticking or chuffing noise on start‑up, and note any drop in turbo response or a sharper exhaust smell. In NZ WOF/COF or Aussie roadworthy checks, visible exhaust leaks can be a fail, so it pays to catch them early.

When replacement’s on the cards, the manual calls for new gaskets or crush rings once removed—reusing old ones is false economy. Mating faces should be cleaned and checked for warping, studs and nuts inspected, and everything torqued in the specified sequence to the GM spec. Avoid sealants unless the service information explicitly says otherwise, most exhaust-gaskets are designed to seal dry. Heat‑cycle checks are a smart move after fitment, especially around the turbo and front pipe where thermal expansion is highest.

For towing, heavy off‑road use, or lots of short trips, add exhaust joint checks to regular services. A fresh gasket now is far cheaper than chasing boost leaks, DPF troubles, or cooked nearby components later.

Popular questions about 2017 Holden Colorado exhaust-gasket

Does the 2017 Holden Colorado actually have an exhaust-gasket?
Yes. Factory documentation shows gaskets at the exhaust manifold to head, and sealing rings/gaskets at the turbo and front pipe connections. These are service items any time the joint is disturbed or if a leak is detected.

What are the symptoms of a blown exhaust-gasket on a 2017 Colorado?
Common signs include a ticking or chuffing sound on cold start that softens as it warms, black soot around a flange, exhaust smell under the bonnet or at idle, and slightly lazier boost response. In some cases the DPF may struggle to regenerate efficiently due to upstream leaks.

Is it safe to keep driving with a leaking exhaust-gasket?
It’s not recommended. Hot gas leaks can damage nearby wiring and plastics, let fumes into the cabin, and affect emissions control. It may also lead to a roadworthy/WOF fail. Book it in and get the gasket replaced before it escalates.