Volkswagen Golf Service & Repair Manual: Checking compression

Volkswagen Golf Service & Repair Manual / 4- cylinder injection engine(1.4 1 direct inction. turbocharger) / Engine cylinder head, valve gear / Cylinder head / Checking compression

Special tools and workshop equipment required

Spark plug socket and extension -3122 B-

Checking compression

Compression tester -V.A.G 1763-

Procedure

Engine oil temperature at least 30 °C.

Battery voltage at least 12.5 V

–	Remove fuse for fuel pump control unit from fuse holder. Fuse assignment → Current flow diagrams, Electrical fault finding and Fitting locations

Note

Removing fuse interrupts voltage supply for fuel pump control unit.

–	Start engine and run it until it turns off.

–	Switch off ignition.

Checking compression

–	Release hose clips -1- and -2-, and remove air pipe.

Checking compression

–	Pull off connector -2- and unscrew bolt -1-.

–	Pull out ignition coils with output stages.

–	Unscrew spark plugs using spark plug socket and extension -3122 B-.

–	Check compression using compression tester -V.A.G 1763-. Refer to → operating manual for information on how to use it.

–	Have a second mechanic press down accelerator completely and simultaneously operate starter until pressure no longer increases on tester display.

–	Repeat procedure on each cylinder.

Checking compression

Compression pressures	bar
New	10.0 … 15.0
Wear limit	7.0
Maximum difference between cylinders	3.0

Reassembly

Installation is carried out in the reverse order; note the following:

–	Install spark plugs.

–	Install ignition coils with output stages → Chapter.

–	Entries are stored in the event memory of the engine control unit because electrical connectors were disconnected and the engine was started: Generate readiness code in Guided functions → Vehicle diagnostic tester.

Specified torques

→ Chapter „Assembly overview - ignition system“

Removing and installing camshaft housing

Removing – Remove coolant pump → Chapter. – Remove air filter housing →&nbs ...

Valve gear

...

Other materials:

Removing and installing headlight washer system pump -V11-, »R«
Special tools and workshop equipment required Drip tray Removing – Remove washer fluid reservoir → Chapter. ...

Notes on towing
First read and observe the introductory information and safety warningsTow rope or tow bar It is easier and safer to tow a vehicle with a tow bar. Only use a tow rope if you do not have a tow bar. The tow rope should be slightly elastic to reduce the strain on both vehicles. It is advisable ...

Removing and installing headlight main beam bulb -M30-/-M32- (dual halogen headlights)
Note Removal and installation are described for the left side. Removal and installation on the right side are carried out in the same way. Removing – P ...