---------------------------------------------------------- Engines-List Digest Archive --- Total Messages Posted Sat 12/24/05: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:09 AM - Re: Engine Won't rotate (J. Mcculley) ________________________________ Message 1 _____________________________________ Time: 10:09:23 AM PST US From: "J. Mcculley" Subject: Engines-List: Re: Engine Won't rotate --> Engines-List message posted by: "J. Mcculley" Jim, I may have missed seeing every suggestion on this stuck rotation subject, but have you used a borescope to inspect the total interior of every cylinder? Something left in a cylinder,or a piston touching the head seems improbable since it was pointed out that the engine had to be turned through more than a complete revolution to check dry tappet clearances during assembly(assuming that wasn't forgotten). Therefore, it seems the problem developed AFTER major assembly. However,the borescope could help search the accessory case interior for something created during the attachment of one of the accessories. Why not remove one-by-one the fuel pump,BOTH mags,etc and test it as each is removed. Using the borescope into each opening as you proceed could also be helpful to see more of the case interior along the way. This would be far less invasive than beginning to totally dismantle the cylinders, and you mentioned feeling and/or hearing the clunk sound near the accessory case as I believe I recall. Jim McCulley > Jim, > > If it's an exhaust valve that is stuck, the piston will be on its way down, > close to BDC. > > I'd check under the valve covers first, that's easily accessible... Then, > after this is ruled out, the accessory case. Then... Do you need a full > re-assembly guide, with pictures? :>) > > Have a nice day > > Philip > > -----Original Message----- > From: owner-engines-list-server@matronics.com > [mailto:owner-engines-list-server@matronics.com]On Behalf Of Jim Stone > Subject: Re: Engines-List: Engine won't rotate by hand a full 360 > degrees > > > --> Engines-List message posted by: "Jim Stone" > > During the hang, no piston is near TDC, does that rule out a valve? I will > varify that again tomorrow. > Thanks, > Jim