Engine Overhaul Manual
Jabiru Aircraft
Pty Ltd
Jabiru 2200 & 3300 Aircraft Engines
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Dated : 28/10/2014
Issued By: AS
Page: 163 of 201
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9.5 Maximum Allowable Clearances (Wear Limits)
All dimensions are given in millimetres
“New Build Clearances” assume use of all current-spec parts.
Table 12
– Clearance and Wear Limits
Part
New Build
Clearances
Top End
Inspection
Full Overhaul
Crankshaft end float
0.20 - 0.80
N/A
Per New Build
Main bearing Clearance
0.035
–
0.10
N/A
Per New Build
Big end bearing clearance
0.04
– 0.07
Per New Build
Per New Build
Big end bearing crush
0.05
– 0.10
Per New Build
Per New Build
Camshaft bearing clearance
0.05
– 0.08
N/A
Per New Build
Camshaft end float
0.05 - 0.50
N/A
Per New Build
Solid Lifter to crankcase
0.15
N/A
Per New Build
Hydraulic Lifter to Case
0.19
N/A
Per New Build
Piston to cylinder
0.08
– 0.13
0.08
– 0.15
Per New Build
Piston compression ring end gap
0.40 - 1.20
N/A
Per New Build
Piston compression ring side clearance
0.08 - 0.12
N/A
0.05
– Early model
0.08 - 0.12
– Late
model
Gudgeon pin to piston
0.04
Per New Build
Per New Build
Inlet valve stem to valve guide
0.055
– 0.08
0.10 Max
Per New Build
Exhaust valve stem to valve guide
0.055
– 0.08
0.10 Max
Per New Build
Distributor shaft/post
0.03
– 0.09
N/A
0.03
– 0.15
Distributor shaft end float
0.5
– 1.20
N/A
Per New Build
Rocker shaft to rocker arm
0.12
– 0.18
Per New Build
Per New Build
Oil pump housing to outer rotor clearance
0.05
– 0.15
Per New Build
Per New Build
Oil pump inner rotor to outer rotor clearance
0.03
– 0.08
Per New Build
Per New Build
Oil pump rotor end clearance (use a
straightedge across the housing to measure
this clearance as shown in Figure 202.)
0.030
– 0.006
Per New Build
Per New Build
Ignition coil gap
0.25
– 0.30
(0.010” – 0.012”)
Per New Build
Per New Build
Spark Plug Gap
0.53 - 0.58
(0.021” - 0.023”)
Per New Build
Per New Build
Valve clearance (solid lifter engines)
0.23
– 0.30
Per New Build
Per New Build
