Mechanical Inspection: Compression
Warm engine to normal operating temperature before checking the compression. Remove ignition coils and spark plugs. See REMOVE/INSTALL/OVERHAUL article. Check engine mechanical condition with a compression gauge, vacuum gauge, or engine analyzer. See engine analyzer manual for specific instructions. See COMPRESSION SPECIFICATIONS table. Install and tighten spark plugs to 13 ft. lbs. (18 N.m).
COMPRESSION SPECIFICATIONS
| Application | Specification | ||
|---|---|---|---|
| Normal Compression Pressure | |||
| V6 Models | |||
| Avalon, Camry & Sienna | 218 psi (15.3 kg/cm2 ) | ||
| Tacoma, T100 & 4Runner | 174 psi (12.2 kg/cm2 ) | ||
| V8 Models | |||
| Land Cruiser & LX470 | 192 psi (13.5 kg/cm2 ) | ||
| Minimum Compression Pressure | |||
| V6 Models | |||
| All Models | 145 psi (10.1 kg/cm2 ) | ||
| V8 Models | |||
| Land Cruiser & LX470 | 142 psi (10.0 kg/cm2 ) | ||
| Maximum Variation Between Cylinders | |||
| V6 Models | |||
| All Models | 15 psi (1.1 kg/cm2 ) | ||
| V8 Models | |||
| Land Cruiser & LX470 | 14 psi (1.0 kg/cm2 ) | ||