Originally Posted by Lille-bror

Hi all.

How do you test, if you have a defective front bearing?

I've read about allowing the engine run at idle speed at then spray some oil between the flywheel and front bearing. If the engine stops, its because of a defective front bearing because the engine sucks air through the bearing.

I tried it on this monday engine that just flame randomly. Could it be because of a defective bearing?

As you can see in the video, its flames right after spraying oil on the bearing.

Defective engine

I wasn't sure if the method was reliable, so I tested it on my BTT engine with brand new bearings (only broken in). Guess what, it flames in the same way as the other engine after I sprayed oil on the bearing.

So, did I make the oil/bearing test correct?