Solara Coupe V6-3.3L (3MZ-FE) (2008)
Compression Check: Testing and Inspection
INSPECTION
1. INSPECT COMPRESSION
(a) Warm up and stop the engine.
(b) Disconnect the injector connectors.
(c) Remove the intake air surge tank (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Service and Repair/Removal).
(d) Remove the 6 ignition coils.
(e) Remove the 6 spark plugs.
(f) Check 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 pressure:
1.5 MPa (15.3 kgf/cm 2, 218 psi)
Minimum pressure:
1.0 MPa (10.2 kgf/cm 2, 145 psi)
Difference between each cylinder:
100 kPa (1.0 kgf/cm 2, 15 psi)
NOTICE:
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Always use a fully charged battery to obtain an engine speed of 250 rpm or more.
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Check the other cylinders' compression pressure in the same way.
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This measurement must be done as quickly as possible.
(4) If the cylinder compression is low, pour a small amount of engine oil into the cylinder through the spark plug hole and inspect again.
HINT:
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If adding oil increases the compression, the piston rings and/or cylinder bore may be worn or damaged.
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If pressure stays low, a valve may be stuck or seated improperly, or there may be leakage in the gasket.