Compression Check; Check And Setting Of Valve Clearance - LIMBACH L 2400 EF Operating And Maintenance Manual

8.7

Compression Check

Compression checks should be performed when the engine is "warm to touch".
Remove spark plugs and the connectors from the injectors.
Measure compression by means of a compression pressure recorder.
Perform measurement with throttle full open. Record compression pressure at
starting rpm for every cylinder until the pressure indicated on the recorder does
nor rise anymore.
Wear limit: 6 bar / 87 psi.
Permitted pressure difference: 2 bar / 29 psi
Reinstall spark plugs and injector connectors.
8.8

Check and Setting of Valve Clearance

Valve clearance must be checked or set only on a cold engine (ambient temperature).
Caution:
Remove spark plug connectors before starting to work.
Remove valve cover.
Valve clearance check.
Turn propeller according to engine rotation until the valves of the second cylinder
are overlapping. Now, the valve clearance of the first cylinder may be checked (see
cylinder designation at page 3.2).
Move thickness gauge between valve shaft and setscrew. The thickness gauge must be
movable slightly "sucking". It must not jam.
Valve clearance setting.
Untighten nut of setscrew and turn setscrew until thickness gauge can be moved slightly "sucking".
Tighten nut and check valve clearance again, readjust, if necessary.
Order of adjustment
The order of adjustment is: 1 - 3 - 2 - 4, i.e. the propeller has to be turned by 180° after the first cylinder
has been set, in order to check the valve clearance of the third cylinder. After another 180° turn accord-
ing to the engine rotation, the valve clearance of the second cylinder may be checked, etc.
Valve clearance:
Intake Valve
Exhaust Valve 0.20 mm
Check cylinder head cover gaskets and replace, if necessary.
Edition: 20.06.2018
L 2400 EF/DF/ET/DT/DX/DS
0.20 mm
Operating Manual
Page: 34/53