How about this:  Engine when stored had "a valve" setting in full open
position. While setting, native moisture from air caused the valve to stick
in open position. When you bar the engine over by hand, the cam moves off
the valve, but spring doesn't pull valve back in closed position, so it's
hanging into combustion chamber..

Piston rises, contacts stuck open valve... blocks further turning....

"Ran when parked"... right?

On Fri, Feb 2, 2018 at 6:47 PM, OK Don via Mercedes <mercedes@okiebenz.com>
wrote:

> Perhaps a valve rusted in the open position? Using a bore scope would tell
> you whether you need to pull heads or not.
> https://www.amazon.com/gp/product/B00GY7C9ZW/ref=oh_aui_
> search_detailpage?ie=UTF8&psc=1
>
>
> On Fri, Feb 2, 2018 at 6:51 PM, Dimitri via Mercedes <
> mercedes@okiebenz.com>
> wrote:
>
> > IIRC, the chain tensioner loses “pressure” when it sits for a while. Oil
> > drains out of it or something but that’s on the M117. Don’t know about
> M116.
> >
> > Sent from my iPhone
> >
> > > On Feb 2, 2018, at 7:28 PM, Craig via Mercedes <mercedes@okiebenz.com>
> > wrote:
> > >
> > > On Fri, 02 Feb 2018 17:46:13 -0600 Curley McLain via Mercedes
> > > <mercedes@okiebenz.com> wrote:
> > >
> > >> Probably next is to pull the valve covers and start checking timing
> > >> chain and its guides.
> > >
> > > If the valves are out of time, that could certainly cause problems.
> > >
> > >
> > > Craig
> > >
> > > _______________________________________
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>
>
> --
> OK Don
>
> *“Travel is fatal to prejudice, bigotry and narrow-mindedness, and many of
> our people need it sorely on these accounts.”* – Mark Twain
>
> "There are three kinds of men: The ones that learns by reading. The few who
> learn by observation. The rest of them have to pee on the electric fence
> for themselves."
>
> WILL ROGERS, *The Manly Wisdom of Will Rogers*
> 2013 F150, 18 mpg
> 2017 Subaru Legacy, 30 mpg
> 1957 C182A, 12 mpg - but at 150 mph!
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