Chevrolet Trax U200

First-generation 1.4-litre turbo four with port fuel injection and a composite valve cover housing the integrated PCV unit, around 138 hp. The central weak spot is the crankcase ventilation: the check valve in the intake manifold and the diaphragm in the valve cover age and fail on virtually every example, causing lean running, rough idle, whistling and oil mist in the intake tract. On top of that come a leaking water pump shaft seal at the weep hole, cracking plastic coolant outlets and coking turbo oil lines. Early model years also suffered cracked pistons. Adequate for daily use but maintenance-heavy, with plenty of small-item repair cost over time.

• !! Turbo oil feed line cokes up (LUV) from 100,000 km

  Oil and coolant lines to the turbo coke or collapse: when the hot engine is shut off, the oil in the lines bakes into sludge and starves the turbo bearing. Result is a turbo smell and ultimately turbo failure. GM Special Coverage A212338300 covers 10 years/120,000 miles.

  Symptoms: Burnt oil smell, power loss, blue smoke, turbo noise
  400–1,700 $
  Ad turbo oil feed line LUV 1.4turbo oil feed line Cruze Trax
• !! Cracked pistons (LUV 2016–2017) from 90,000 km

  Early pistons (2016-2017) crack at the ring lands, often triggered by low-speed pre-ignition (LSPI). The result is heavy oil consumption up to engine failure. GM revised the pistons afterwards; affected engines usually need replacement.

  Symptoms: Heavy blue smoke, oil consumption over 1 qt per 1,000 mi, engine knock
  3,000–8,000 $
  Ad piston kit 1.4 LUV
• !! Intake manifold PCV check valve failure (LUV) from 70,000 km

  The orange rubber check valve in the intake manifold and the valve-cover diaphragm age and fail on virtually every engine: lean running, whistling, rough idle, oil mist in the intake. The valve can be sucked into the intake and burns up; the valve cover usually needs replacing in the same job.

  Symptoms: Underboost codes, rough idle, whistling from intake, power loss
  200–1,100 $
  Ad intake manifold 1.4 LUVPCV valve Cruze 1.4

+ 3 more engine weaknesses + vehicle weaknesses

Next-generation 1.4-litre turbo four with direct injection, an aluminium valve cover and revised fully-floating pistons, around 155 hp. Architecturally a clean-sheet redesign rather than just a DI variant of its predecessor, with different bore and a forged crank. The notorious PCV and piston issues of the port-injected previous generation are largely resolved. In return, direct injection brings intake-valve carbon buildup as the typical DI concern, plus weeping coolant loss through the thermostat housing and hoses and age-related oil consumption at higher mileage. Early units were sensitive to low-speed pre-ignition, making Dexos full-synthetic oil mandatory. Notably more durable than the first generation.

• !! Turbo wear past 100k miles (LE2) from 160,000 km

  The LE2 turbo lasts considerably longer than the previous generation's, but shows bearing and wastegate wear beyond 100,000 miles — accelerated by low coolant level from a leaking cooling system. P0299 underboost. Rebuildable or replace.

  Symptoms: Whistling from turbo, power loss under load, blue smoke
  1,400–2,700 $
  Ad turbocharger LE2 1.4
• !! Coolant consumption past 100k miles (LE2) from 160,000 km

  Beyond high mileage the LE2 shows weeping coolant consumption through the thermostat housing, hoses and, in extreme cases, the head gasket. Ignored loss risks overheating and turbo damage — check coolant level regularly.

  Symptoms: Reservoir level drops, no visible leak, possible overheating
  300–1,500 $
  Ad thermostat housing LE2
• !! Oil consumption from valve seals (LE2) from 130,000 km

  Past 80,000 miles, LE2 engines show oil consumption from hardened valve stem seals and piston ring wear. Cat risk.

  Symptoms: Blue smoke on cold start, oil level drops
  800–2,500 $
  Ad valve stem seals 1.4 LE2

+ 1 more engine weaknesses + vehicle weaknesses