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Date: Thu, 23 Feb 2012 00:24:09 -0500
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From: Tim Olson <Tim@myrv10.com>
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Subject: Re: [LML] finding oil leak
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If I could only be so lucky!  I had a couple of through
bolts on the front of my case that were leaking, and the
prop governor shaft plug seal. I fixed them, but then
started to get the most faint of oil on the right
windscreen.  In 1.5-2 hours, it probably doesn't
even add up to a drop's worth of oil, it's so faint,
but it's there.

I replaced the front seal.  The seal was cracking, and
clearly was a good thing to replace, and there was oil
coming down from the seal.  But, the new seal didn't
fix it.  I replaced the seal again, being more careful.
Still seeing the very faint mist. Most of the top of
the engine is totally dry, and nothing really too
notable on the bottom either.  So I'm really confused.
It doesn't come from the propeller, but from somewhere
aft, either near the front seal or right inlet.

I've used the dye and a blacklite pen on a prior
leak...that works good. I'm going to have to spring
for some dye though.  Sure wish there was an easy way!
Tim


   On 2/22/2012 11:36 AM, JON ADDISON wrote:
> Re-oil leak in my IO 360:
>
> Found by washing engine carefully (no water in mags or dry vacuum pump).
> eg simple green with hot water.
>
> Run engine short time, because I want to see where oil emanates from
> before it spreads out too much.
>
> Examine with quality Ultra Violet light: there it was from front seal.
> Could NOT see it with naked eye. Replaced seal. Retested, no more leak.
>
> Used Slim 3W Penlight (100 lumens), Model SNLSM3WW13, $60, from Sunlite
> Science & Technology, 345 North Iowa Street, Lawrence, KS
> 66044n(785-832-8818).
>
> Works good... last a long time.
>
> Also, Snap On sells a very similar light.
>
> Jack Addison
>
>