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Servicing valve gear > < Assemble

Leon Mk2

Checking compression pressures
   
Checking compression pressures
Special tools and workshop equipment required
t  Spark plug spanner -T20028-
t  Torque wrench -SAT 8010-
t  Compression tester -V.A.G 1763- or -V.A.G 1381/0-

Test conditions
l  Engine oil temperature must be at least 30 °C.
Work sequence
–  Remove air cleaner → Chapter Dismantling and assembling air cleaner.
–  Remove spark plugs with spark plug wrench -T20028-.
   
–  Pull 4-pin connector off ignition transformer -arrow-.
–  Remove fuse No. 7 for the fuel/injector pump.
–  Depress accelerator fully so that the throttle valve is fully open using a second mechanic.
–  Check compressions with compression tester -V.A.G 1381- (-V.A.G 1763-).
  Note!
See relevant test unit operating instructions for instructions on how to use test unit.
–  Work the starter until the check device no longer shows an increase in pressure.
Compression pressure:
New: 10...15 bar Wear limit: 7 bar
Permissible difference between all cylinders: 3 bar
–  Install spark plugs with spark plug wrench -T20028- and tighten to 30 Nm.
–  Consult the fault memory → Chapter..
  E28-0002

Servicing valve gear > < Assemble