Also known as: 1c-l, 1c-ii, 1c-tl, 2c-t, 2c-iii, 2c-e, 3c-e, 3c-t, 3c-te, 1c, 2c, 3c, 2c-tl
Toyota's small diesel four — the 1.8 1C, 2.0 2C and 2.2 3C — in the Corolla, Carina, Avensis, Picnic and Estima.
It is indirect-injection with a mechanical pump and has nothing modern about it: no common rail, no particulate filter, nothing to regenerate. Almost every modern diesel complaint is inapplicable.
⚑ Its known failure is the cylinder head, which cracks between the valve seats and the pre-combustion chambers — a genuine pattern on the 2C and 3C rather than a rumour, and usually the consequence of one overheat. Coolant loss with no external leak is the tell, and a chemical block tester answers it in ten minutes.
The timing belt drives the injection pump as well as the camshaft, so a belt service is not the job it is on a petrol engine, and getting the pump timing back is the part that takes the skill. Glow plugs and their relay are the commonest cold-start fault and are testable in minutes.
Cars fitted with this engine
8 generations, across 1 make. From the authored catalogue — an absent car means the catalogue has not reached it, not that the engine was never fitted.
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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