Neosophist wrote:

The oil level where spot on. I recently did a service on the engine. New crank bearings, con-rod bearing, piston rings, oil, oil filter etc.. Wrong sized shell bearings maybe...?

Was the engine already worn or did you just replace them? Seems a pretty intense service. (most VFR engines will reliably go upto 70-80k km without needing rings or bearings providing they've had oil in them.

Interesting failure there.

How did you determine what bearing shells to order? (plastigauge?) and did you check them after-installing them... i've ordered bearing shells before only to find after installation that the ones supplied were infact wrong! (good job I double checked)

If they were correct perhaps there was a blockage in one of the oil passageways or oil filter, or even some particle contamination.

Did you flush out the engine before working on it? I've sometimes found with worn bearings to have metal contaminate in the engine, a good parrafin gun on a high pressure airline to blow through the entire block helps to remove any traces of material... you only need a few metal fragments to hit one of the jornals to cause wear.. this then creates more metal and you get a chain-reaction that eats up your internals.

Was the oil used new / clean and the correct grade?

Terrible shame but i'd get a good known running engine.

Have you tried speaking with Drew (Moriwaki Man) He lives out in Japan and can get you a decent known running engine if there arn't any easily available where you live

andreasmkr wrote:

Neosophist wrote:Have you tried speaking with Drew (Moriwaki Man) He lives out in Japan and can get you a decent known running engine if there arn't any easily available where you live

I cannot seem to find Drew(Moriwaki man) under members?

It would be hard to find a engine here in Norway. There are only 6 RVF400 ever taken into the country, and one of them is mine