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1.Before inspection, check that the engine oil, starter and battery are normal. In addition,
set the vehicle to the pre-inspection condition.
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2.Remove the inlet manifold.
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3.Disconnect all of the injector connectors.
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4.Disconnect all of the glow plug connectors and remove the glow plugs.
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5.Cover the glow plug hole with a shop towel etc., and after the engine has been cranked,
check that no foreign material is adhering to the shop towel.
| caution |
- Keep away from the glow
plug hole when cranking.
- If compression is measured with water, oil, fuel, etc., that has come from cracks
inside the cylinder, these materials will become heated and will gush out from glow plug hole,
which is dangerous.
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6.Set the special tool (compression pressure gauge adapter) to the glow plug hole.
Tightening torque: 1.0 ± 0.1 N·m
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7.Set the compression pressure gauge to the special tool.
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8.Crank the engine and measure the compression pressure for all the cylinders, and check
that the pressure differences of the cylinders are below the limit.
Limit: max 500 kPa (5 bar)
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9.If there is a cylinder with a compression difference that is outside the limit, pour
a small amount of engine oil through the glow plug hole, and repeat the operations in steps
6 and 8.
(1)
If the compression increases after oil is added, the cause of the malfunction is a
worn or damaged piston ring and/or cylinder inner surface.
(2)
If the compression does not rise after oil is added, the cause is a burnt or defective
valve seat, or pressure is leaking from the gasket.
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10.Connect the injector connectors.
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11.Install the glow plugs.
Tightening torque: 1.0 ± 0.1 N·m
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12.Reconnect the glow plug connectors.
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13.Install the inlet manifold.
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14.Use the M.U.T.-III to erase the diagnosis codes.
| note |
This will erase the diagnosis code resulting from the crank angle sensor connector being
disconnected.
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