> 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 |
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