skoda Workshop Repair Guides

Skoda Workshop Service and Repair Manuals

ABOUT US
Repairing Valve Gear > < Removing and installing the cylinder head (Roomster)|Install

Fabia Mk2

Testing compression pressure (Roomster)
Testing compression pressure (Roomster)
For engine with engine code AXR, BSW
l  Engine oil temperature at least 30 °C.
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  Flexible-head wrench for glow plugs
Test conditions
Engine oil temperature at least 30°C.
Test sequence
   
–  Lift the engine cover at the sides -arrows A- and pull out towards the front -arrow B-.
–  Disconnect central plug connection for unit injector.
–  Remove all glow plugs using a flexible-head wrench.
  S10-0374
–  Screw in adapter instead of the glow plugs.
–  Check compression pressure with the compression gauge.
  Note
Use of tester → Operating Instructions.
–  Operate starter until the tester no longer indicates a pressure rise.
Compression readings
  N15-0227
NewWear limitPermissible difference between the cylinders
2.5 … 3.1 MPa1.9 MPamax. 0.5 MPa
25…31 bar19 barmax. 5 bar

–  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.
For engine with engine code BLS
The compression pressure is tested through the “fault finding program” of the vehicle diagnosis, measurement and information system -VAS 5051 - under “Repair Group 15; Cylinder head/valve gear; Particular System, Boundary Conditions; Diagnostic Object: poor compression pressure”.
   

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