[AT] stuck good on a WD 45 engine question!--Will

[John Wilkens]

Actually it was an "expert (me)" farmer-quality Job...if you know 
what I mean.  Sure not meaning to insult my farmer friends!  I didn't 
measure the valve stem clearance ( lacking that kind of "expert" 
equipment) but all the valve stems seemed pretty tight and much 
better than some I've experienced (determined
by "expert farmer touch").  Actually I guess I could have used a 
micrometer to compare the valve stem dia. with the dia. of the 
tight-fitting valve seat grinder guide.  Humm....my expertise failed 
me there.   The cylinder walls did look good.  The engine was rebuilt 
with new pistons and rings in the recent past by others.  Thanks for 
your good observations Will!  We will be considering the either test 
you suggest.    John


At 03:45 AM 12/12/2006, you wrote:

>John,
>
>I don't believe a compression check will tell you if you have a bad 
>valve guide..... Most oil is sucked in during the intake stroke, 
>which the compression check does not measure.
>
>As you know you are either sucking it up from the rings, down from 
>the valve guide, or through a crack ....
>
>You say it was an expert valve job, did you replace the valve 
>guides, or check them for wear? Were they tight?
>
>I have never done exactly what I am about to suggest, and you and 
>others may not deem it safe, but what if you took the valve cover 
>off, started it up and shot a very short burst of either on the 
>intake valves in question? If the engine increased its speed it 
>would tell you that you surely have a valve stem problem.... I have 
>shot either around suspected intake manifolds and detected leaks... 
>again, not the safest procedure....  Just a suggestion, but try at 
>your own risk.....
>
>Did you examine all of the cylinder walls for scoring while you had 
>it apart? Could be that a gouge one the bottom of the cylinder wall 
>is letting the oil come in.....
>
>Regards,
>
>Will Powell
>
>
>
>
> > >
> > >
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                    In the wide-open spaces of NE Oregon