[xj-s] Dropped seat

["David Johnson" <davesjag@worldnet.att.net>]

Kirby, I'm interested in which cylinder on your vehicle had the dropped
seat.  On mine it was # 5  on the B bank.  I was wondering if on yours it is
also nearer the back.  My intake seat did exactly as yours.  It seems to
have simply fallen out and the valve prevented it from falling further.  It
hung up slightly cocked protruding down perhaps 1/16 of an inch.  I didn't
find any evidence of it touching the piston either.   In a previous
discussion I seem to remember you posing the question as to whether the
coolant could take a "short cut" and come out of the head disproportionately
through the outlets nearer the front of the engine.  If this is possible,
perhaps the majority of the coolant flowing back through the head takes this
short cut.  In trying to recall I think most of the crud in the water jacket
was in the rear of the block.  Perhaps the crud gathers there because there
is minimal flow through those outlets?  Or perhaps the crud, along with
being farther from the pump causes the rear most outlets to plug.
Effectively cutting off the cooling efficiency at the rear of the engine,
causing localized hot spots?  The engine's gauges would read "all is well",
as mine did because the coolant coming back through the front outlets would
be much cooler than the coolant "trapped" near the rear and you'd still have
a overheating situation.  Perhaps others who had dropped seats could voice
in on the cylinders affected.

Dave

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