Compression Check: Testing and Inspection

2ZR-FE ENGINE MECHANICAL: ENGINE: ON-VEHICLE INSPECTION

ON-VEHICLE INSPECTION

1. INSPECT COMPRESSION
(a) Warm up and stop the engine.
(b) Remove the No. 2 cylinder head cover Removal.
(c) Remove the 4 ignition coils.
(d) Remove the 4 spark plugs Removal.
(e) Disconnect the 4 fuel injector connectors.





(f) Inspect the cylinder compression pressure.
(1) Insert a compression gauge into the spark plug hole.
(2) Fully open the throttle.
(3) While cranking the engine, measure the compression pressure.
Compression:
1373 kPa (14.0 kgf/cm2, 199 psi)
Minimum pressure:
1079 kPa (11.0 kgf/cm2, 157 psi)
Difference between each cylinder:
98 kPa (1.0 kgf/cm2, 14.2 psi) or less
NOTICE:
- Use a fully-charged battery so that the engine speed can be increased to 250 rpm or more.
- Inspect the other cylinders in the same way.
- Measure the compression in as a short time as possible.
(4) If the cylinder compression is low, pour a small amount of engine oil into the cylinder through the spark plug hole, then inspect it again.
HINT:
- If adding oil increases the compression, the piston rings and/or cylinder bore may be worn or damaged.
- If the pressure stays low, the valve may be stuck or seated improperly, or there may be leakage from the gasket.

(g) Connect the 4 fuel injector connectors.
(h) Install the 4 spark plugs Installation.
(i) Install the 4 ignition coils.
Torque: 10 Nm (102 kgf-cm, 7 ft-lbf)
(j) Install the No. 2 cylinder head cover Installation.