Toyota Celica: 2ZZ-GE excessive oil consumption from piston ring design

The 2ZZ-GE engine fitted to ZZT231 Celica GT-S suffers from documented piston oil control ring failure resulting in excessive oil consumption. Toyota acknowledged this through a class action settlement (US) and issued revised piston rings (part number updates in 2003 TSB). The original rings lose tension within 60,000–120,000 km, causing oil to pass into the combustion chamber. Consumption of 1 litre per 800–1,500 km is commonly reported. Running low on oil — which is easy given the high consumption rate and high-revving nature of the engine — causes VVTL-i camshaft lobe and follower wear as a secondary failure.

• Blue-grey smoke on startup and at high rpm
• Oil level dropping 1L or more per 1,000 km
• Oily or fouled spark plugs
• Catalytic converter damage from excess oil burning

1. 1

   Check oil level and ask how frequently it needs topping up.

2. 2

   Remove oil filler cap and observe for blueish haze at idle.

3. 3

   Pull and inspect spark plugs for oiling.

4. 4

   Request a leakdown test if the car is being seriously considered for purchase.

$3,000 to $7,500 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.

• “How often do you add oil between changes?”
• “Has the car ever had revised Toyota piston rings installed?”
• “Has the catalytic converter ever been replaced?”

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.