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Subject:Exhaust valve leak on fresh top end rebuild-I need a little advice
From:Giasson, Pascal (DNR/MRN)
Date:Wed, 2 Apr 2008 08:25:27 -0300

So I decided to do a leak down test on my 1.9 resealed top end last
night just to see if all the cylinders were the same, and to see if I
messed up something on reassembly.  The heads have a fresh valve job,
new Goetz rings, and cylinders deglazed and I used Total Seal Quick Seat
piston ring powder on the cylinders.  The results were #1: 77%, #2: 87%,
#3:88%, #4:89%.  So something is not quite right with #1.  I could hear
and feel air coming out the exhaust port so I tried taping on the
exhaust valve stem several times both with the combustion chamber
pressurised and depressurised.  I then rotated the valve a little bit to
see if that mad a difference, but it did not.  I assume this is not
"normal" and will not get better after the engine gets a few miles on it
(I'm kind of thinking that it might end up burning that valve).  Am I
looking at taking it apart again and having a look at that exhaust valve
to see what is going on?  Any suggestions?  Thanks

Pascal

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