VW Golf manuals

Volkswagen Golf Service & Repair Manual: 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:

Connectors
Repairs to wiring harnesses and connectors   Note All instructions and notes regarding this chapter are available under → Electrical System, General Information; Rep. gr.97.     ...

Assembly overview - foot rest and floor covering, LHD vehicles
1 -  Foot rest Removing and installing → Chapter Must fully engage into bracket. 2 -  Nut Qty. 3 2 Nm 3 -  Bracket Removing and installing → Chapter 4&nbs ...

Contents
Fig. 217 Contents of the vehicle toolkit First read and observe the introductory information and safety warningsThe content of the vehicle toolkit depends on the vehicle equipment level. The following describes the maximum scope. The vehicle toolkit contains the following Screwdriver w ...

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