Toyota Avanza: K3-VE timing chain wear

The 1.3 litre K3-VE is chain-driven and the chain wears, which is the main mechanical concern with this engine alongside the piston ring sealing it is better known for. It shows as a rattle from the front of the engine after a cold start that lengthens over months, and if it is left long enough the chain can skip timing. The engine is otherwise a straightforward, durable unit that mechanics describe as easy to live with — most of its problems develop slowly and predictably rather than suddenly — so this is a check to make rather than a reason to avoid the car. The cold-start rattle is the whole test, and it is the one thing a warm engine hides completely, which matters on a vehicle that is almost always bought used and often imported.

• Rattle from the front of the engine for a few seconds after a cold start
• Rattle lasting longer, or present when warm, as it worsens
• Engine warning light with camshaft timing codes
• Rough idle, or a loss of pulling power from low revs
• Oil that is black, thin or below the mark on the dipstick

Insist on a stone-cold start and be standing at the front of the vehicle when the key is turned — this is the whole check, and a seller who warmed it up before you arrived has removed the only evidence, so arrange to come back rather than settle for a warm start. Listen to the first five seconds for a rattle or chatter from the front of the engine; a healthy one is quiet almost immediately, and a noise that hangs on for several seconds is the finding. Let it warm through and listen again at idle with the bonnet up. Watch the tachometer at idle for a needle that will not settle. On the drive, pull away from low revs in a higher gear and note any lack of pulling power. Check the oil level and colour on the dipstick, since chain wear on a small engine tracks oil neglect closely, and ask how often the oil is changed and whether the timing chain has ever been done. On an import, ask what is actually known about the vehicle's history. If a workshop inspection is possible: ask for the fault codes to be read for camshaft timing faults.

Parts involved: Timing chain.

$600 to $2,000 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “Does it rattle at all when started from cold?”
• “Has the timing chain ever been replaced?”
• “How often has the oil been changed, and is there any record?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.