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Repairing Valve Gear > < Removing and installing the cylinder head (Octavia II)|Install

Octavia Mk2

Testing compression pressure (Octavia II)
Testing compression pressure (Octavia II)
Special tools and workshop equipment required
t  Compression gauge, e.g. -V.A.G 1763 -
t  Adapter, e.g. -V.A.G 1381/12 -
t  Hinged wrench
Test conditions
Engine oil temperature at least 30°C.
Test sequence
–  Remove engine cover → Chapter.
–  Detach central plug connection for unit injectors and edge connector for glow plugs.
–  Unscrew all glow plugs with flexible-head wrench.
   
–  Screw the adapter (e.g. -V.A.G 1381/12 -), in place of the glow plug into the relevant cylinder.
–  Test compression pressure with compression gauge (e.g. -V.A.G 1763-).
  Note
Use of tester → Operating Instructions.
–  The 2nd mechanic operates the starter until the tester no longer indicates a pressure rise.
Compression readings
  S15-0448
NewWear limitPermissible difference between the cylinders
 
2.5 … 3.1 MPa1.9 MPamax. 0.5 MPa
25…31 bar19 barmax. 5 bar

Work procedure after the compression pressure test
–  Install glow plugs and tighten to 15 Nm.
–  Connect central plug connection for unit injectors and edge connector for glow plugs.
–  Then interrogate the fault memory of the engine control unit and erase → Vehicle diagnosis, testing and information system VAS 5051.
   

Repairing Valve Gear > < Removing and installing the cylinder head (Octavia II)|Install