[Laird Scooby]

I'm not saying i'm right on this but i've heard the vibration damper (aka crankshaft pulley) has a habit of doing that on 940s so a replacement is called for.

From what i understand (might be wrong again) there is a metal plate at the back of it, a solid rubber centre piece and then the actual pulley part on the front.

If the bonding agent/glue has shifted, the damper part (rubber bit) will also shift and be out of line. This could cause excess movement on the crank itself leading to damaged oil seals, i can't believe anyone would renew the seals without replacing the cause (the pulley/damper itself) but i suppose someone might have done.

I must reiterate, this is my "best guess", i've not heard of a 740 doing it although i suppose they could as well but i've only had 740s and my 760 which is a different engine anyway.