Chevrolet LAF (Ecotec, 2.0–2.4)
2.4 L · inline-4 · petrol · 2006–2014
Also known as: 2.4 ecotec, ecotec 2.4, l850, lea, le5, lue, 2.4 sidi, le9, z22yh, z22se, z20net, z20lel, a20nft, a20nht, z20let, z20ler, b207, b207r
A direct-injected member of GM's Ecotec inline-four family, whose internal codename is L850. The Ecotec name is ambiguous and that ambiguity causes real misdiagnosis — it was also applied to a Buick V6 in Holden vehicles and to the last overhead-cam derivatives of the older Family II four, so "Ecotec" on a badge or in a listing does not identify the engine. Work from the code, not the name.
The direct-injected 2.4 of this period is associated with oil consumption traced to the piston rings, and with timing-chain wear that presents as a cold-start rattle and eventually as cam-to-crank correlation codes. The two compound each other in the usual way: a chain-driven engine running persistently low on oil wears its chain faster.
High-pressure fuel pump and injector faults are the third theme, and share symptoms with the low-oil condition often enough that oil level is worth confirming before any fuel-side diagnosis.
Cars fitted with this engine
21 generations, across 8 makes. From the authored catalogue — an absent car means the catalogue has not reached it, not that the engine was never fitted.
Buick
Chevrolet
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