Aircraft Service Manual
Jabiru Aircraft
Pty Ltd
JTM001-1
J120, J160, J170, J200/J400, J230/J430, J250/J450 Variants
REVISION
1
Dated: Nov 2011
Issued By: SW
Page: 161 of 233
13.4 COOLING AIR BAFFLES
13.4.1 DESCRIPTION
The baffles installed around the engine direct the cooling air flow to the oil cooler and to other
engine components to provide optimum engine cooling. The baffles, air inlets and outlets and air
scoops are accurately positioned to maintain engine cooling efficiency and their removal will
cause improper air circulation and engine overheating.
13.4.2 COOLING AIR BAFFLE REMOVAL
Baffles are removed by unbolting from the engine and removing tension springs and their
attaching wires.
In most cases the spark plug leads must also be removed with the duct.
13.4.3 CLEANING AND INSPECTION
Engine baffles should be cleaned with a suitable solvent (Mineral Turpentine) to remove dirt and
oil.
Inspect baffles for cracks, splits or damage. In particular, ensure that the hard-points where the
ducts are bolted to the engine are in good condition.
13.4.4 REPAIR
Rubber seals may be replaced by removing the existing rubber parts, rubbing back the bonding
face of the fibreglass baffles to bare glass (using 80 grit sandpaper or similar) and bonding new
rubber strips in place with 5-Minute Araldite.
Damaged mounting hard points for the air ducts are best repaired by the installation of reinforcing
tags as shown in Figure 134.
13.4.5 COOLING AIR BAFFLE INSTALLATION
Reverse the preceding steps for installation.
WARNING
An improperly secured air duct may result in poor cooling, high engine temperatures and engine
damage. In addition, cases have been recorded where a poorly fitted duct lifted from the engine
and pulled the spark plug leads off the engine, resulting in engine stoppage.
