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Engine Overhaul Manual
Jabiru Aircraft
Pty Ltd
Jabiru 2200 & 3300 Aircraft Engines
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Dated : 28/10/2014
Issued By: AS
Page: 65 of 201
L:\files\Manuals_For_Products\Engine_Manuals\Overhaul_Manual\JEM0001-7_Overhaul_Manual_DRAFT_(29_10_14).docx
Figure 72
– Removing Studs and Dowels from Crankcase
If the case is to be surfaced and line-bored then all dowels and studs must be removed from the
crankcase. Use a collet type stud remover to unscrew the retained studs from the crankcase. Gentle
application of heat will assist the removal as shown above. Extract the dowels from the lower stud
holes
– in Figure 72 an expanding puller is being used to pull the dowels out of the case. Clean the
stud holes with an M10x1.5 tap (an old stud with grooves cut in the thread to act as a tap may also be
used) and clean and dry the cases.
5.10.1.6 Main Bearings
Examples of main bearing wear are shown below.
Note that the use of automotive oils or oil additives has proven to cause very rapid wear in Jabiru
engines. An air-cooled aero engine is operating at higher power settings and significantly higher
temperatures than a car engine
– and Jabiru engines hold less oil than a normal automotive engine.
This puts a lot more pressure on the oil and unless the oil is specifically designed for the application it
can break down, leading to rapid wear of the engine.