Al Gietzen wrote:

On the sparkplug side; front side housing.  There is a hex head plug at the
top - about 125mm thread; and a ~150mm allen head head plug about 6-7" down
the side (just above where it flares out at the bottom).  What are they?

I'm guessing allen is water jacket and hex head is oil?  What are/were they
used for?

Thanks,
Al

You mean 12.5 mm. That sounds like somebody added that. That is
in the region of the main oil gallery.

The lower one communicates with the water jacket.

Paul Lamar
 
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