Testing Compression - Skoda Octavia Workshop Manual

OCTAVIA
Edition 04.01
S00.5104.54.20
Cylinder Head, Valve Gear

Testing compression

Test condition
l Coolant temperature at least 30 °C
Special tools, testers and aids required
♦ Compression tester, (e.g. V.A.G 1381 or
V.A.G 1763)
♦ Spark plug wrench
Test procedure
- Unplug connector from ignition transformer
and connectors from injectors.
- Remove spark plug connectors and unclip
ignition cables.
- Use spark plug wrench to remove spark
plugs.
- Open throttle valve fully.
- Use compression tester, (e.g. V.A.G 1381 or
V.A.G 1763), to test compression.
Note:
Use of tester:
⇒ Operating Instructions.
- Continue operating starter until no further
pressure rise is indicated by the tester.
Specified compression:
(MPa pressure)
Engine
code
AGN
AGU, ARZ,
AUM, ARX
AUQ
- Interrogate fault memory:
⇒ Motronic Fuel Injection and Ignition System
of corresponding engine; Repair Group 01.
Note:
If the fault memory was erased, interrogate fault
memory and generate readiness code:
⇒ Repair Group 01 of corresponding engine -
Motronic Fuel Injection and Ignition System.
Engine new Wear limit
0.9 ... 1.4 0.75
1.0 ... 1.3 0.7
1.0 ... 1.3 0.75
15
Difference
between
cylinders
max. 0.3
max. 0.3
max. 0.3
------------ 15-11 ------------