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1. 10:09 AM - Re: Engine Won't rotate (J. Mcculley)
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| Subject: | Re: Engine Won't rotate |
--> Engines-List message posted by: "J. Mcculley" <mcculleyja@starpower.net>
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" <jrstone@insightbb.com>
>
> During the hang, no piston is near TDC, does that rule out a valve? I will
> varify that again tomorrow.
> Thanks,
> Jim
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