Skoda Workshop Service and Repair Manuals > Octavia Mk1 > Drive unit | 1.4 ltr./44 kW Engine - Mechanical Components | Engine cylinder head, valve gear | Removing and installing cylinder head

Testing the compression

Note

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	Spark plug wrench (e.g. 3122 B)

t	Torque wrench 5 ... 50 Nm (e.g. -V.A.G 1331 -)

Test sequence

–	Remove engine cover → Chapter.

–	Unplug 4-pin connector -arrow- from the ignition terminal.

–	Remove the fixing screws of the ignition terminal and detach ignition terminal from the park plugs.

–	Unscrew spark plugs with spark plug wrench (e.g. 3122 B).

–	Remove fuse 32.

Note

Removing fuse 32 interrupts the voltage supply of the injectors.

–	Have a second mechanic fully depress the accelerator pedal.

–	Check compression pressure with compression tester (e.g. -V.A.G 1381- or -V.A.G 1763-).

Note

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

Compression readings

Engine new	Wear limit	Difference between cylinders
min. 1.2 MPa	0.75 MPa	max. 0.3 MPa

–	Install spark plugs, ignition terminal, fuse 32 and engine cover.

–	Interrogate fault memory and erase → 1.4 ltr./44 kW engine, fuel injection → Rep. Gr.01.

Note

Separating the plug connections causes faults to be stored.

Tightening torques

Component	Nm
Spark plugs in cylinder head	30
Ignition terminal to bracket	9

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