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: 67 of 103
L:\files\Manuals_For_Products\Engine_Manuals\Engine Maintenance Manual 22 & 33\JEM0002-5.docx
Tensioning is carried out when the engine is cold.
Torque the screws in the order shown in Figure 39.
Note any screws which require more than 1/4 - 1/3 of a turn to reach the set tension as this
may be an indication of issues such as excess temperature in service.
Re-fit the 1/8 NPT plug to close the access hole to the bottom head bolt. Torque to the setting
given in Table 10.
Re-fit the rocker cover to the head, ensuring that the seal is correctly positioned in the groove
in the head.
Re-fit the ram air cooling ducts.
CAUTION
Do not over-tighten. Over-tightening will eventually loosen fit between plug & head to the
point where the plug will not be secure.
Figure 39
– Head Bolt Locations
9.16
Inspect Valve Springs & Rockers
Required Tools:
Tools as required in section 9.15
Vernier Calipers
Parts and Material:
Replacement valve spring washers (if required)
Type of Maintenance:
Heavy Maintenance
Level of Certification:
L2 or LAME (A&P or LSA Repairman / Maintenance)
Return to Service:
L2 or LAME (A&P or LSA Repairman / Maintenance)
While the rocker cover is removed for the cylinder head bolt tension check (Section 9.15),
visually inspect the components inside the rocker chest:
1. Visually check for wear or damage to the rocker and valve stem tip.
2. Visually check for wear or damage to the valve spring.
3. Measure the thickness of the upper valve spring washer as shown in Figure 40. Any
measurement below 1.3mm must be investigated and worn parts replaced; failure typically
occurs at around 1.0mm.
4. When all parts have been inspected re-assemble the engine.
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