X-Mozilla-Keys:                                                                                 
Brian D. Cain wrote:

Hey guys, the subject of the heat differences between
the front and rear rotor chambers has been something
that's floated in and out of my mind from time to time.

In our automotive crowd, it seems that the common failure
of the turbo engines is the classic partially-shattered apex
seal in the rear rotor chamber.  That's nice and all but it
seems as if that encompasses a very large percentage of
the engines that are blown from high-output use, say
"spirited" driving and/or racing.

One of the potential causes of this I believe is the heat being
transferred to the rear iron end plate from exhaust gas
entering the 'EGR jacket'.  I know there's some subtle
differences between the two that may contribute, like having
a huge fan blowing right on the front cover and a few other
things, but this one concerns me a bit.  Most people
have removed the EGR valve and have substituted the valve
with a block-off plate in its place.  The problem remains, however,
that there is still an exhaust port in the rotor housing's exhaust
sleeve, if memory serves, where those gasses will travel
through a dedicated EGR jacket into the lower intake manifold.

My gut says this might be one problematic area.

Any opinions on this, guys?

B

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