2ltr a/c engine probs

[REN]

Anyone got an suggestions?

Stripped top end to sort leaking head, replaced crank seals,pushrod tube seals, head & base gaskets, removed carbon from heads & pistons, lapped in valves.

Motor ran sweet for 1000 miles then started spewing oil out from (i think) the flywheel side crank oilseal to the extent where i used 5ltrs of oil in 250 miles last week!

Anyway it also looks as if there has been a bit of oil spray comming out of the engine breather aswell (got one of those small filters on).

I know that worn pistons/barrels will preasurise the crankcase but will anything else cause this problem?

Motor now removed again this mornin to sot so i'm lookin for inspiration!

Ren

[Fritz]

Ren,,,,,,

Motor ran sweet for 1000 miles then started spewing oil out from (i think) the flywheel side crank oilseal to the extent where i used 5ltrs of oil in 250 miles last week!

First question is did you change this seal while the motor was out first time or not ? Coz the only thing that springs to mind is ,perhaps you have broken a piston ring during the first rebuild ?
But they do say (old school engineers) Don't clean off the tops of the pistons as this can cause oil consumption to increase on a worn engine.

Check crank case breather hole is not restricted in any way on the system as a poor (crank seal) will be one of the first places to leak when the motor is running.

Regards,

Fritz,,,,,,,,,,