Parts for your 2020 Holden Colorado-Exhaust gasket

2020 Holden Colorado exhaust gasket — what it is and when it needs attention

Based on the Holden RG Colorado Workshop Manual (Engine Exhaust – 2.8L diesel), the GM Global EPC for MY2020 RG, and ACDelco/GM Genuine Parts catalogue listings, the 2020 Holden Colorado does use exhaust gaskets. These include a multi‑layer steel exhaust manifold gasket between the cylinder head and manifold, sealing hardware at the turbocharger interfaces (turbo to manifold and turbo outlet V‑band with a sealing ring on applicable builds), plus crush gaskets at certain exhaust sensor and EGR cooler joints. So yes—exhaust gaskets are very much part of the Colorado’s exhaust system.

On this 2.8‑litre turbo‑diesel, exhaust gaskets keep hot gases where they belong, protecting nearby components, helping the turbo spool properly, and keeping the DPF, EGT sensors and pressure sensors reading accurately. A healthy seal cuts the tinny tick or hiss that comes with leaks, reduces soot streaks around joints, and helps the ute meet emissions targets without fuss.

Exhaust gaskets aren’t a “replace every X kilometres” item, they’re serviced when disturbed or when symptoms appear. If a manifold, turbo or DPF section is removed, the workshop manual specifies new gaskets/sealing rings and, in many cases, new single‑use fasteners and V‑band clamps. That’s the safe, factory‑approved way to prevent repeat leaks.

Owners and techs should watch for:

• Tapping or ticking on cold start that softens as it warms up
• Hiss under boost, loss of grunt, or delayed turbo response
• Sooty trails around flanges, a diesel smell, or fumes near the firewall
• DPF issues or fault codes related to pressure/temperature sensors caused by upstream leaks

When replacing, let the turbo/exhaust cool right down, soak stubborn hardware, and follow the Holden torque specs and tightening sequence. Mating faces need to be clean and flat, don’t reuse crushed rings or distorted V‑band clamps. After refit, a quick smoke test or soapy‑water check (engine idling, cold) can confirm a proper seal before hitting the road.

A well‑sealed exhaust keeps the Colorado quieter, cleaner, and happier under load—ideal for towing or long out‑of‑town hauls.

Popular questions about 2020 Holden Colorado exhaust gaskets

Does the 2020 Colorado have a manifold gasket or just V‑bands?
It has both types in the system. The 2.8‑litre diesel uses a multi‑layer steel manifold gasket at the cylinder head, and V‑band clamping at the turbo outlet. Depending on build, a thin sealing ring is used at certain V‑band joints. This layout is confirmed across the Holden RG Workshop Manual and GM EPC listings.

What are the common signs of a leaking exhaust gasket on the Colorado?
Typical giveaways include a ticking sound on cold start, a hiss under boost, soot marks around flanges, an exhaust smell, and sometimes sluggish boost or DPF‑related warnings if the leak is upstream. Any of those should prompt an inspection before it gets worse.

Is it okay to keep driving with a small exhaust gasket leak?
It’s not ideal. Even a small leak can skew sensor readings, upset DPF regen, slow turbo response, and allow fumes into the cabin. Short trips to the workshop are usually fine, but it’s best to sort it promptly and use new gaskets and clamps as specified by Holden.