Skoda Workshop Service and Repair Manuals > Fabia Mk1 > Power unit | 1.9/47 kW SDI Engine | Engine cylinder head, valve gear | Removing and installing the cylinder head

Testing the compression

Test condition

l	Engine oil temperature at least 30°C

Special tools and workshop equipment required

t	Compression tester, e.g. -V.A.G 1381- or -V.A.G 1763-

t	Adapter, e.g. -V.A.G 1381/12-

t	Flexible-head wrench for glow plugs

Test sequence

–	Remove engine cover.

Pull the front and rear engine cover upwards with a sudden motion -arrows-.

–	Disconnect the 10-pin plug connection on the injection pump.

–	Remove all glow plugs with the flexible-head wrench for glow plugs.

–	Screw in the adapter, e.g. -V.A.G 1381/12-, instead of the relevant glow plug.

–	Check compression pressure consecutively on all the cylinders using the compression tester.

Note

–	Operate starter until the tester no longer indicates a pressure rise.

Compression readings

New engine	Wear limit	Permissible pressure difference between the cylinders
2,5 ... 3.1 MPa	1.9 MPa	max. 0.5 MPa

–	Screw in glow plugs with flexible-head wrench for glow plugs.

Tightening torque: 15 Nm

–	Interrogate fault memory and erase → Vehicle diagnostic tester.

Note

Separating the plug connection at the injection pump causes faults to be stored.

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