| Parameter | Specification | |-----------|---------------| | Material | Aluminum alloy | | Head Gasket Surface Flatness (max warp) | 0.05 mm (0.0020 in) | | Head Height (new, measured at mating surface) | 108.9 – 109.1 mm | | Valve Seat Angle | 45° (intake & exhaust) | | Valve Guide Inner Diameter | 5.0 – 5.012 mm |
Before turning a wrench, you must memorize or bookmark these factory figures. A top manual lists them clearly. 1szfe engine manual top
| Specification | Value | | :--- | :--- | | Engine Code | 1SZ-FE | | Displacement | 998 cc | | Bore x Stroke | 69.0 mm x 66.7 mm | | Compression Ratio | 10.0 : 1 | | Compression Pressure | 14.2 kg/cm² (202 psi) | | Firing Order | 1-3-4-2 | | Idle Speed | 650 – 750 rpm | | Valve Clearance (Cold) | Intake: 0.15–0.25 mm / Exhaust: 0.25–0.35 mm | Note: A top manual will also show you
Note: A top manual will also show you how to adjust these shim-type buckets—a tricky job on this engine. Unlike many modern engines that use hydraulic lifters,
Unlike many modern engines that use hydraulic lifters, the 1SZ-FE uses mechanical shim buckets for valve adjustment.
| Parameter | Intake Cam | Exhaust Cam | |-----------|------------|-------------| | Journal Diameter | 22.96 – 23.00 mm | same | | Cam Lobe Height (standard) | 35.23 mm | 35.23 mm | | Service Limit (lobe height) | 35.03 mm | 35.03 mm | | Journal Oil Clearance | 0.030 – 0.072 mm | same | | Camshaft End Play | 0.08 – 0.18 mm | same |