[juanbenae]

does the motor turn over by hand at all or is it frozen up? id have to assume if you are planning a leakdown you must have confirmed it turns? something like marvel's mystery oil or even a bit of motor oil in each cylinder before attempting to turn it is advised if not done already. too much oil could skew your leakdown efforts, but enough to mist the cylinders and rings would be good.

if there is little to no evidence of the case leaking tear the top end down, pull the rods to see what the bearings look like, then determine if the case should be split. a top end with the heads redone, updated/fresh tensioners, a top end reaseal, rod truing and bearings and having the webers looked over might be closer to that 15-17K if the cams P&C need simple touch ups.