Higher compression, lightweight pistons, and an electronic throttle control system (ETCS-i).

Rotate the engine by hand two full revolutions clockwise to verify the timing marks align perfectly before reassembling.

The key to that longevity is using the as a bible—not a suggestion. Follow the torque sequences, respect the interference design, and never ignore a cold-start rattle.

Use a pulley holder tool to break loose the crankshaft bolt. Remove the pulley and the lower plastic belt cover.

The manual guided his hands as he replaced the timing belt, the diagrams showing the exact alignment of the cam gears. He took extra care with the valve clearances, a tedious task that required the patience of a monk. The manual called for precision, and Elias gave it nothing less.

(Breakthrough Engine with Advanced Mechanism System) version. This was the 1G-FE's "glow-up." Toyota added (Variable Valve Timing) and the

| Interval | Task | |----------|------| | 3,000 | Engine oil & filter change | | 15,000 | Inspect spark plugs, replace air filter | | 30,000 | Replace spark plugs (NGK BKR5E or equivalent), replace fuel filter | | 60,000 | , inspect water pump, adjust valve clearances | | 90,000 | Replace coolant, inspect drive belts | | 120,000 | Timing belt again, replace camshaft seals, crankshaft seal |

The 1G-FE underwent several major revisions throughout its production cycle:

Intake: 0.15 mm−0.25 mm(0.006−0.010 in)Intake: 0.15 mm minus 0.25 mm space open paren 0.006 minus 0.010 in close paren