Jab 3300 engine Top end O/H

[gwillimm]

Gooday all been running a jab 3300 for 3.5years and done 750 hours, the lean burn economy kit that was supplied and fitted just after motor was run in. Just pulled down top end due to compression leaking betwean head & barrels on all 6 cylinders and o'rings leaking at the barrels. leakdown test showed the ring wear but valves ok. Just sent the heads barrels and pistons away from inspection.

 

The motor was running well but down in power.

 

We run 2 oil coolers one through a duct & one at the front of the engine cowl which gives us continous oil temp of 80 deg and max of 100deg on long

 

climb. oil ppessure @ 220kpi.

 

CHT temp on cruse @ 280 deg F and on climb max 320deg F, I have done 500 hours + in Jabs and rearly had such constant temptures on climb.

 

Verry happy with the Brumbys temptures have done there homework.

 

Hope this is intresting to you all

 

Yours in flying

 

Mick :thumb_up:

 

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