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Engine Overhaul Manual
Jabiru Aircraft
Pty Ltd
Jabiru 2200 & 3300 Aircraft Engines
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ISSUE
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6 7
Dated : 28/10/2014
Issued By: AS
Page: 146 of 201
L:\files\Manuals_For_Products\Engine_Manuals\Overhaul_Manual\JEM0001-7_Overhaul_Manual_DRAFT_(29_10_14).docx
Figure 186
– Valve Clearance Adjustment (Solid Lifter)
7.8.11 Induction Plenum & Tubes
Figure 187
– Induction Manifold Installation
The upper induction pipes have all been fitted to the cylinder head during sub-assembly and by now it
will be obvious if any have been fitted to the wrong head.
Fit the diffuser(s) inside the plenum chamber halves. 2200 and most 3300 engines both use an “airfoil”
diffuser shaped as circled in Figure 187 (Left). Later 3300 engines use two round diffusers.
The two halves of the plenum chamber are fitted together as shown, using Loctite 515 sealant between
the halves.
Once assembled by hand the plenum chamber can be fitted to the engine.
Insert new O rings into the plenum chamber as shown. In this application the O rings must be installed
dry
– sealant will be added later.
Fit the rubber joining hoses onto each induction pipe and push them up towards the head. The hose
clamps should also be fitted now, but not tightened.
One by one, fit the lower induction pipes into the plenum chamber. Before fitting, wipe the inside of the
socket of the plenum chamber with Loctite 2 gasket sealant, making sure that the O ring is coated.
Additional sealant is applied to each stub pipe. Care must be taken to get the amount of sealant right
–
too little will result in leaks which can dangerously affect the fuel/air mixture while too little will form
blobs inside the induction manifold and need to be cleaned out.
While the sealant is still wet push the rubber joining hoses over the joints in the pipes. Mark or measure
the pipes so that the hose is centred over the join. Then tighten the hose clamps
– orient the clamps for
easy access when installed on the aircraft.