-------------- Original message from Ernest Christley : --------------

> Kelly Troyer wrote:
> > Ernest,
> > Snap me a photo (up close) of your front cover including the
> > oil metering pump mount pad. What do you know about this
> > 13B? Has it been overhauled? Has there been any mixing and
> > matching of parts from different year models,etc? Do you have
> > any way of finding out what year donor car the engine came from?
> > Perhaps we can figure out what year engine came from without
> > opening it. On that note you can determine rotor model year by
> > examining the combustion cavity. The 86-89-1/2 have the cavity
> > cast in the rotor face. The 89-1/2-95 have the cavity machined
> > in the rotor face. FWIW
> > --
> > Kelly Troyer
> > Dyke Delta/13B/RD1C/EC2
> >
>
> Here ya' go, Kelly.
>
> I believe the eliptical coverplate in the middle is the oil metering
> pump mount pad, and the two bolts exiting to the right are for the
> A/C...not motor mount attach points?
>
> The camera did a decent job of shooting a picture down the exhaust. You
> can barely tell that the rotor combustion cavity is cast. That argues
> for the 86.
>
> The second picture shows the flywheel that was bolted to the front. It
> was attached to the crank pully by the small aluminum 'thing' that is
> bottom, front and center of the picture. The starter was bolted to a
> pad that was bolted between the two arms that have been welded to the
> front cover. Now, I plan to cut those arms off, but they are attached
> to a couple of shorter tabs that appear to be an integral part of the
> front housing. Can I cut the whole thing off, or did the shorter tabs
> perform some greater task?
>
OK Ernest IMHO you have a 1986-89-1/2 13B......9.4 to 1 compression

rotors...... Attached is photo of front housing metering pump and mounting

pad for this vintage engine.......You are correct about the studs.......they

are for a/c compressor mounting.

 

Kelly