Range Rover P38
BMW DIESEL
1
REPAIR
CYLINDER PRESSURE CHECK - DIESEL
Service repair no - 19.60.31
NOTE: Test must only be carried out with
battery in good condition. Compression
tests should not be used as the sole
means of assessing the state of an engine. They
must only be used to support other symptoms or
the results of other tests.
1. Disconnect battery negative lead.
2. Remove glow plugs.
See FUEL SYSTEM,
Repair.
3. Release cover and disconnect lead from stop
solenoid.
4. Remove 2 screws securing harness trunking to
cylinder block and position trunking aside.
5. Reconnect battery negative lead.
6. Using kit LRT-19-007 fit adaptor DA 102-85 to
number 1 glow plug location. Tighten to
20 Nm
(15 lbf.ft).
7. Connect gauge to adaptor and tighten securely.
8. Operate the starter motor until the gauge needle
reaches its highest reading and mark with the
pointer.
9. Repeat operations 6 to 8 on remaining cylinders.
10. All readings should be at least 20 bar and within
approximately 3 bar of each other.
11. If any reading is low, inject 4 shots of clean
engine oil into glowplug hole and repeat test.
Low readings on both wet and dry tests indicate
a badly seating valve or leaking cylinder head
gasket. Low readings on a dry test and
satisfactory wet test results indicate piston ring
and/or cylinder bore problems.
12. Disconnect battery negative lead.
13. Remove test equipment.
14. Connect stop solenoid.
15. Align harness trunking and secure with screws.
16. Fit glow plugs,
See FUEL SYSTEM, Repair.
17. Reconnect battery negative lead.
