Quote:
Originally Posted by Major Dad
What would be excellent to good leak down figures , and / or what would the figures be for a freshly rebuild engine ?
|
New 2% to 4% is about average can be less.
low mile used 2500 miles on a hot rod 2.5SS with MFI
leak down was similar to O.P. .All exhaust valves were where the loss was. Tapping the valves brought all of them down to 4%
Well used can be 10% or higher with loss thru the rings and exhaust.