Head Bolt Tension Check - Jabiru 2200 Maintenance Manual

Engine Maintenance Manual
JEM0002-
9.15

Head Bolt Tension Check

Required Tools:
Parts and Material:
Type of Maintenance:
Level of Certification:
Return to Service:

Remove the air ducts to allow access to the cylinder heads. Note that ducts do not need to be
completely removed from the engine – for example, on current model Jabiru Aircraft the
retaining screws and springs are disconnected, the high tension leads disconnected from the
spark plugs and the ducts may be swung away to allow access.

Remove the rocker covers and the 1/8 NPT plug which gives access to the lower head bolt
(see at the location indicated as bolt #5 in Figure 39).

If the engine has been operating in a corrosive environment (such as coastal areas) it is
possible for the cylinder head screws to rust in place. In this scenario it may be necessary to
periodically removed screw one at a time (do not remove all at once), check for rust
(substantially corroded screws must be replaced), and apply copper anti-seize before
reinstalling to the torque setting.

There is no longer an "initial / new installation" or "subsequent" torque setting, there is only one
torque setting to which cylinder head screws are to be torqued on installation or checking, this
is specified in Table 10.

When fitted, head screws are lubricated with copper anti-seize. Note that this is applied to the
threads and under the head of the screw. Screws are then installed to the
prescribed.
This document is controlled while it remains on the Jabiru server. Once this no longer applies the document becomes uncontrolled.
1 2 3
ISSUE
Jabiru Aircraft
Figure 38 – Tacho Sender #2
Allen keys
Torque wrench
Thread lubricant
Replacement screws (if required)
Heavy Maintenance
L2 or LAME (A&P or LSA Repairman / Maintenance)
L2 or LAME (A&P or LSA Repairman / Maintenance)
4 5 6 7 Dated :
Pty Ltd
Jabiru 2200 & 3300 Aircraft Engines
th
30 June 2016
Issued By: AS
torque setting
Page: 67 of 106