Compression (Camry)
- Warm engine to normal operating temperature before checking compression. Stop engine. Ensure battery is fully charged. Disconnect injector connectors.
- Remove intake air surge tank. Disconnect throttle position sensor connector, throttle control motor sensor connector, Exhaust Gas Recirculation (EGR) gas temperature sensor connector and EGR valve position sensor connector. Disconnect 2 water bypass hoses and purge hose. Disconnect hoses and cables. Remove 4 nuts, EGR pipe and 2 gaskets. Remove 2 bolts and No. 1 engine hanger. Remove 2 bolts and surge tank stay No. 1. Disconnect engine wire from emission control valve set. Using an 8 mm socket wrench, remove 2 bolts, 2 nuts and intake air surge tank. (Scheme 1)
- Remove ignition coils. See «IGNITION COIL»(ref-151984-S18546097782003010900000) under IGNITION SYSTEMS in REMOVAL & INSTALLATION - V6 & V8 article. Remove spark plugs.
- Fully open throttle and using compression gauge (SST 09992-00500), check compression while cranking engine. Read compression in a short a time as possible. Ensure compression is within specification. See «COMPRESSION SPECIFICATIONS»(/toyota/land-cruiser/100-2002-2005/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures-v6-v8) table.
- If cylinder compression is low, pour a small amount of engine oil into cylinder through spark plug hole and inspect again. If adding oil increases compression, it is likely that piston rings and/or cylinder bore are worn or damaged. If pressure stays low, a valve may be sticking or seating improperly, or there may be leakage past head gasket.
- Install and tighten spark plugs to 13 ft. lbs. (18 N.m). Reinstall and tighten ignition coils to 71 INCH lbs. (8 N.m).
- Install and tighten air intake chamber assembly bolts and nuts to 32 ft. lbs. (43 N.m). Install and tighten No. 1 engine hanger bolts to 29 ft. lbs. (39 N.m). Install and tighten surge tank stay No. 1 bolts to 14 ft. lbs. (20 N.m). Install EGR pipe nuts to 9 ft. lbs. (12 N.m).
