Engine Maintenance Manual
Jabiru Aircraft
Pty Ltd
JEM0002-5
Jabiru 2200 & 3300 Aircraft Engines
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ISSUE
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Dated : 2nd June 2015
Issued By: AS
Page: 88 of 103
L:\files\Manuals_For_Products\Engine_Manuals\Engine Maintenance Manual 22 & 33\JEM0002-5.docx
10.17 Hydraulic Valve Lifters
Symptoms
Possible Cause
Remedy
1)
Engine noisy, “tapping” at idle
“Soft” lifter(s) due to lifter fault
Replace lifter(s)
“Soft” lifter(s) due to low oil
pressure
See Low Oil Pressure section
above.
“Soft” lifter(s) due to air in lifter
Run engine. Up to 15 minutes
running may be required to
completely expel air from the
lifter.
OR
Remove lifter and manually fill
with oil.
2)
Reduced engine power
Soft or stuck hydraulic lifter(s)
Replace lifter(s)
“Soft” lifter(s) due to low oil
pressure
See Low Oil Pressure section
above.
Lifters “pumping up” holding
valves open
Reduce operating oil pressure
(within limits)
Replace lifter(s)
3)
Excess metal in oil filter
Cam / Lifter damage
Inspect lifter and cam working
surfaces. Replace if damaged.
Notes:
-
Refer to Section 9.20 for additional details on hydraulic lifter maintenance requirements.