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Sir Erl Seal et. al.



In a message dated 96-11-22 18:17:35 EST, you write:

<< It sounds like too much air getting through the camshaft and crankshaft
oil 
 seals.
  
 The excess air causes the mixture to be set rich to compensate - when the
WOT 
 switch enriches the mixture, it gets far TOO rich and the engine stumbles.
  
 a) Is the CO setting erratic?
  
 b) What colour are the plugs? 
  >>
My observations are that when C & C seals are going phil, oil on the outside
of the motor are readily apparent....  I've seen this post from you a few
times, so I'm sure you have your source for this, but remember, the later
cars use a different composition of seal than the earlier cars...   The idle
stabilation circuit 86> (US)can compensate for a leaking valve cover gasket,
which has exponentially more surface area under the same vacuum as the two
seals you speak of.....  Camshaft seal leakage is easy to detect, crank
isn't, but oil on the front of the motor is a good clue....  The vacuum in
the pcv isn't that excessive, and that goes default to atmosphere when the
engine is off, creating a big wet hint....  If it is sucking air, it is
leaking enough to cause serious oil presence when car is shut off...

Scott