Originally Posted by
lynchfourtwenty i dont think cold has anything to do with it, tested plenty of cold engines that had been sitting a while an never seen a good one that had a low # in 1 or more cylinders..
i THINK when doing a leak down you can only do 2 cylinders at a time, maybe 3? i forget which ones.. when i was testing the engines we have on hand i found that if i didnt rotate the engine for a few of the cylinders it would show terrible leak down an u could hear air coming outta the exhaust valves... once rotated it would seal up tho.. giver a try if u didnt..
Originally Posted by
lynchfourtwenty Dont think you understood what Was saying lol ... an what do you mean "by hand"?
Lynch, I don't think you are helping by confusing him. When doing a leakdown test, you want to hand crank each cylinder to TDC on the compression stroke. This mean one cylinder at a time. When you are suggesting "i THINK when doing a leak down you can only do 2 cylinders at a time, maybe 3?", one cylinder would be at TDC and the other would be at BDC. Because the cylinders are at different positions you will get different readings. For consistency, each cylinder has to be at the same crank position, TDC compression.