T&T: 10 top Lehman Oil Leaks

[Bruce TeSelle]

Tom I don't know if you have had your oil leak problem answered yet but; go
to a parts store and get a bottle of dye that is used in conjunction with a
blacklight.  They have it for cooling systems, crankcase, a/c etc.  After
you run the engine for a while, under power or whatever conditions generally
cause the leak, use the black light to find the leak.  I understand that you
can even get a blacklight flash light now to save some expense.  I have used
the blacklight/dye method in the repair business for years and it saves
lotsa guessing.  The leak will be very evident.  Once used it in a cooling
system for an intermittent leak that turned out to be at a water pump shaft
seal. The whole engine room glowed caused by mist from the pulley - but
there was a clear trail (bright yellow) from below the weep hole.  This is a
great tool, works for a/c systems as well.

Bruce TeSelle
Captain Hook
Galveston Texas

-----Original Message-----
From: trawlers-and-trawlering-bounces at lists.samurai.com
[mailto:trawlers-and-trawlering-bounces at lists.samurai.com] On Behalf Of
Thomas Averill
Sent: Monday, November 26, 2007 12:30 AM
To: T&T
Subject: T&T: 10 top Lehman Oil Leaks

This is going to sound lame, but I am having a heck of a time finding an oil
leak on my 120 Lehman/34Chb.  As you know, the bilge container slopes to the
bow and that is where the oil collects in the box under the motor.  I have
lined the box with paper towels, abosorbtion mats etc. and cannot find the
drip line.  It seems to only leak when run for several hours, not one or
two.
I thought the front main seal may be the culprit, but have ruled that out.
Also, I do not believe it is the valve cover or any of the cooling lines. It
will drop a quart in 20 hours, so it is worth the concern.  Any tips you
have to find the culprit would be appreciated.  How about an oil dye or
something to make the source more identifiable?  Thanks  Tom
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