Remove 4 spark plugs.
Disconnect 4 injector connectors.
Check the compression in each cylinder.
Fig. 2.321. Installing the adapter
Install SST (adapter) into the spark plug hole (fig. 2.321).
Tightening torque: 12 Nm.
Fig. 2.322. Connecting the compression gauge
Attach SST (compression meter) to SST (adapter) (fig. 2.322).
Open the throttle fully, then start the engine.
While turning the engine crankshaft with the starter, measure the compression.
Compression: 2628 kPa.
Minimum allowable compression: 2157 kPa or more.
Difference in compression values between cylinders: 490 kPa or less.
Note: To ensure that the starter motor rotates the engine crankshaft at 250 min⁻¹ or more, a fully charged battery must be used.
Note: Check the compression in the remaining cylinders in the same way.
Note: Measurements should be taken as quickly as possible before the engine cools down.
If the compression in the cylinder is too low, pour a small amount of engine oil into the cylinder through the spark plug hole, then measure the compression again.
Note: If the compression increases after adding oil, the piston rings and/or cylinder bore are likely worn or damaged.
Note: If the pressure does not increase, the valve may be sticking or leaking, or the head gasket may be blown.
Connect 4 injector connectors.
Install 4 spark plugs.