Check Oil Lines for Leaks on New Install Before Adding Oil?

It would be a good idea. Last time I installed new lines I discovered a tiny leak, 1 drop under a fitting per flight but not able to get it to leak by running the engine on the ground. I am still trying to locate the exact source!

I think the best way to test your system would be to remove the hose going into the engine and block it off. Then set up for a purge following the purge oil system in the install manual but do this with no oil. Should be ample pressure to find any air leaks in the oil hoses and after you are done you are almost set up for the oil purge.

I would definitely not force any air through the engine as this will most likely wreak havoc on the hydraulic lifters.

Hi Michael,

If it gives you satisfaction/reassurance, go fo it however I don't think you will achieve very much by doing so.

Use quality hose, of the correct ID and connecting system. 

My connections are all push on, with fuel injector type hose clamps. Have never had a leak.

The correct ID hose, properly fitted, will not leak.

The clamp is there for security, not for leak prevention - tighten only enough to prevent hose slipping off spigot.

Fuel injector hose clamps are designed to give 360 degree even pressure, without damaging the hose, can be reused many times, come in several diffrent designs. 

Hose on engine, to/from component mounted to engine ie moved with engine, should be long enough to stay in place without clamping.

Hose that goes to/from engine, to any non moving component eg oil tank must have sufficient length to accommodate engine movement.

Hose that may be exposed to heat from exhaust system should have extra shielding.😈

Thanks Sean.  I am using AN8 stainless-steel braided Teflon hoses with integral firesleeves.  Manufactured by Aircraft Specialty.  I'm always a bit anxious about tightening those AN8 fittings!