Parts for your 2000 Holden Commodore-Timing belt kit

2000 Holden Commodore timing-belt-kit — do you need one?

A timing-belt-kit isn’t used on the 2000 Holden Commodore. Technical sources point out that every engine offered in this model year is chain-driven, not belt-driven. The factory Holden VT/VX Service Manuals list the 3.8-litre Ecotec V6 (L36, and the optional supercharged L67) with an internal timing chain. GM Powertrain documentation for the 5.7-litre Gen III V8 (LS1) also specifies a roller timing chain. Australian parts catalogues from brands like Gates and Dayco don’t list a timing belt for these engines—only timing chain components—confirming that a timing-belt-kit isn’t applicable.

Why no timing belt? The Commodore’s pushrod (OHV) engines use a chain to link the crankshaft and camshaft(s). The chain runs inside the engine, bathed in oil, and is designed to last the life of the engine under normal conditions. Timing belts are typically used on many overhead-cam engines, where external belt drives and regular replacement intervals are common. That simply doesn’t apply here.

What owners should do instead is keep the chain healthy by maintaining clean oil. Regular servicing with quality oil and filters helps minimise chain and sprocket wear. There’s no set kilometre-based replacement interval for the timing chain on these Commodores, replacement is usually only considered if there are symptoms such as hard starting, rattles on cold start, noticeable chain noise at idle, incorrect cam/crank correlation codes, or poor running. High-kilometre engines or those with a history of infrequent oil changes may warrant inspection of the chain, tensioner and guides by a professional.

It’s also smart to look after the related front-end hardware that owners often mistake for timing-belt items. On these Commodores the serpentine (accessory) belt, belt tensioner and idler pulleys are external and serviceable, and the water pump is driven by the accessory belt—not by a timing belt. Replacing a worn accessory belt and noisy pulleys, and keeping coolant and oil changes up to date, will do far more for reliability than hunting for a timing-belt-kit that doesn’t fit this vehicle.

• Technical references: Holden VT/VX Factory Service Manuals (L36/L67 V6, LS1 V8)
• GM Powertrain LS1 Service Manual (roller timing chain specification)
• Gates Australia and Dayco Australia catalogues (no timing belt listings for 2000 Commodore, chain components only)

Popular questions about 2000 Holden Commodore timing-belt-kit

Does a 2000 Holden Commodore have a timing belt?
No. The 2000 Commodore’s 3.8-litre Ecotec V6 (L36/L67) and 5.7-litre LS1 V8 use internal timing chains. Factory manuals and local parts catalogues confirm there’s no timing belt or timing-belt-kit for these engines.

When should the timing chain be replaced on a 2000 Commodore?
There’s no fixed service interval. Chains are generally “fit for life,” but high kilometres, poor oil change history, start-up rattles, fault codes, or running issues can justify inspection and possible replacement of the chain, tensioner and sprockets.

What should be serviced instead of a timing belt on this model?
Focus on regular oil and filter changes, the accessory (serpentine) belt, belt tensioner and idler pulleys, and the water pump and coolant. These items are external, wear over time, and have a much bigger impact on day-to-day reliability.