Testing Compression - Skoda Octavia 1996 Service Manual

OCTAVIA
Edition 05.97
S00.5105.51.20
Cylinder Head/Valve Gear
Testing compression pressure
Test condition
l Engine oil temperature at least 30 °C
Special tools, testers and aids required
♦ Compression pressure tester
(e.g. V.A.G 1381 or V.A.G 1763)
♦ Spark plug wrench
Test procedure
- Switch off ignition (if not already off) and
unplug connectors at all four injectors.
- Switch off ignition (if not already off) and
unplug connectors at ignition coils with power
output stage.
- Use spark plug wrench to remove spark
plugs.
- Open throttle valve fully.
- Test compression pressure with compress-
ion pressure tester (e.g. V.A.G 1381 or V.A.G
1763).
Note:
Use of tester:
⇒ Operating Instructions
- Operate starter for only as long as no further
pressure rise is indicated by the tester.
Compression pressures:
New
1.0 ... 1.3 MPa
- Interrogate fault memory:
⇒ 1.6-ltr./74 kW Engine, Simos 2 Fuel Injection
and Ignition System; Repair Group 01; Self-
Diagnosis; Interrogating and erasing fault
memory
Note:
Faults are stored as a result of unplugging the
connectors. After completing test, interrogate
fault memory and erase, if necessary.
Wear limit Difference
between
cylinders
0.75 MPa max. 0.3 MPa
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15
¡ ¢ £
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