Parts for your 2013 Holden Colorado-Head gasket

2013 Holden Colorado Head Gasket — What It Does and When To Replace It

Yes, the 2013 Holden Colorado uses a head gasket. This is confirmed by technical sources including the Holden/GM RG Colorado (2012–2016) service manual under Engine Mechanical – Cylinder Head (2.8L diesel), the GM Global Electronic Parts Catalogue listings for the RG Colorado, and VM Motori/GM Duramax 2.8 technical documentation that specifies a multi‑layer steel (MLS) head gasket and torque‑to‑yield head bolts for this engine family.

On the 2013 Colorado, the head gasket lives between the cylinder head and the engine block, sealing three critical systems: high‑pressure combustion in the cylinders, coolant passages, and engine oil galleries. When it’s healthy, it keeps compression tight for good grunt, and it stops coolant and oil from mixing. Being an MLS design, it’s built to handle the diesel’s higher cylinder pressures and temperature swings, provided the cooling system is kept in good nick.

As part of servicing, the best “maintenance” for a head gasket is prevention. That means staying on top of the cooling system: correct long‑life coolant to spec (not plain water), regular coolant changes, a clean radiator, a sound cap and thermostat, and never driving on when it overheats. Chip tunes and hard towing in hot conditions can push cylinder pressures and temps up, so watching EGTs and coolant temps pays off for longevity.

Head gasket replacement on a 2.8 diesel Colorado is a proper workshop job. The head has to come off, surfaces must be checked for flatness, and the gasket thickness selected to spec. New torque‑to‑yield head bolts are required, and threads need to be clean and lightly oiled as specified. It’s smart to have the head pressure‑tested, and only skim within the service limits. While there, many workshops replace ancillary gaskets, inspect injectors and seats, and verify timing alignment before first start. Once rebuilt, fresh oil and coolant, proper bleeding of the cooling system, and an early post‑repair check for leaks help lock in a good result.

• Watch for warning signs: persistent overheating, pressure in the top hose from cold, white exhaust smoke, sweet smell from the exhaust, milky oil, unexplained coolant loss, or rough cold starts.
• If any of these show up, avoid further driving and get a cooling‑system and combustion‑gas test done to confirm.

Popular questions about the 2013 Holden Colorado head gasket

Does a 2013 Holden Colorado definitely have a head gasket?
Yes. The RG‑series service manual details cylinder head removal/installation for the 2.8L diesel, specifying an MLS head gasket and one‑time‑use head bolts. The GM parts catalogue also lists head gaskets by engine code for this model year.

Common signs the head gasket has failed on a Colorado?
Typical clues include overheating, coolant loss with no visible leak, white steam from the exhaust, contaminated (milky) engine oil, pressurised cooling hoses shortly after cold start, or a misfire/rough idle. A chemical block test or cylinder‑pressure/leak‑down test helps confirm the diagnosis.

How much does a head gasket job usually cost in Aus/NZ?
Costs vary with labour rates, machining needs, and what else is replaced (bolts, fluids, ancillary gaskets, injector seals). Expect it to be a sizeable job that can run into several thousand dollars. A detailed, written quote based on inspection is the best guide.