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Scania CV AB 2011, Sweden
01:03-02
Measuring the compression
pressure
The following description only applies to
engines with an injection pump.
Special tools
Number Denomination Illustration Tool board
98 249 Compression tester MV
99 310 Socket D5
99 074 Impact setting tool D1
99 079 Puller for injector D1
99 308 Sleeve for injector D5
Measuring the compression pressure is used as a
step in troubleshooting. If an engine is running
unevenly, this measurement may indicate
whether one or more cylinders is worn or
damaged. There may be damage to the cylinder
head valves, cylinder liners or piston rings. The
measurement indicates which cylinder(s) should
be subject to further testing.
The results are only intended for comparison
between the cylinders. Lower compression in
one or more of the cylinders is a sign of
abnormal wear or damage.
Engine assembly
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