Skoda FABIA 2000 Workshop Manual page 54

15
Testing the compression
Special tools, test and measuring equipment and
auxiliary items required
♦ Spark plug wrench, e.g. -3122 B-
♦ Compression tester, e. g. -V.A.G 1763-
♦ Extractor -T 10094-
Test condition
•
Engine oil temperature at least 30 °C.
Test sequence
–
Pull off hose -1- (for engines as of 04.02) and remove
engine protection -2- with air filter upwards -arrows-.
Engines with the engine codes AUA, AUB
–
Remove the spark plug connector and remove the ig-
nition cable guide.
–
Disconnect the 4-pin plug from the ignition transform-
er -arrow-.
Engines with the engine codes BBY, BBZ, BKY
–
Remove all 4-pin plugs from the ignition coils.
–
Pull out all ignition coils using the extractor -T 10094-.
–
Remove cable guide from cylinder head cover.
Continued for all vehicles
–
Unscrew the spark plugs.
–
Remove fuse no. 35 from the fuse holder.
Note
Removing fuse no. 35 interrupts the voltage supply of the
injectors.
–
Press down the accelerator pedal fully (assistance of
second mechanic required).
–
Test compression with compression tester,
e.g.-V.A.G 1763-.
Note
The use of the tester is described in the relevant operat-
ing instructions.
–
Operate starter until the tester no longer indicates a
pressure rise.
Compression readings:
New engine Wear limit
10...15 bar 7 bar (0.7 MPa)
(1...1.5 MPa)
15-1 10
page
FABIA 2000
Difference be-
tween cylinders
3 bar (0.3 MPa)
Removing and installing cylinder head
1.4/55; 1.4/74 Engine - Mechanical Components
Edition 05.05
S00.5306.06.20