Date:         Wed, 2 Jul 2003 16:57:50 -0500
Reply-To:     Joel Walker <jwalker17@EARTHLINK.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Joel Walker <jwalker17@EARTHLINK.NET>
Subject:      Re: leakdown test values needed
Content-Type: text/plain; charset="iso-8859-1"

> Does anyone out there in radio-land know the values a leakdown
test should
> show for a 2.1 waterboxer in GOOD condition (30,000 miles)?

check this out ... it's about rebuildng an engine, but has good
info
http://www.pelicanparts.com/bmw/techarticles/Borrowed/mult_engine_rebuild-1.htm

"A newly rebuilt engine should have leak-down percentages of
around 3-5%. An engine in good running condition should show 10%
or less. Numbers around 20% indicate some wear of the engine, but
are still adequate for good engine operation. Leakage numbers of
around 30% indicate that there are problems brewing, and that a
rebuild may be necessary. Needless to say a large leakage amount
like 90% indicates that there is a hole in the combustion
chamber, and the engine is probably not firing on this cylinder
at all."

so there's not any 'values' for the watergboxer exactly ... but
the percentages would be consistent across brands and types of
engines. remember that the percentage is TIME dependent .. that
is, the mechanic (or you) need to time the percentage of air loss
over the same clock time ...either 30 seconds or one minute or
whatever. but you have to use the same time for each cylinder ...
or the numbers won't be consistent.

good luck!
joel