I just did a leak down test. I was wondering if anybody could comment on the numbers. 1: 20% 2: 42% 3: 35% 4: 30% 5: 41% 6: 35% I'm pretty sure I set all cylindres at TDC but it's difficult for #2-5 to be absolutely sure.
All the air was streaming pass the rings, I could hear nothing at the exhaust, intake, neighboring cylinders, nor were there bubbles in the expansion tank.
In the BBB it says max 25% (20% pass the rings and 5% throgh the valves) I'm getting around 7 km/l and burning oil, even though only spark plug #4 is black, all the others look fine. Funny thing is the motor is doing very well, smooth idle, fast steady acceleration all thru the revs. I have nothing that indicates that the engine should be in bad condition.
Now my questions and doubts are mounting. Do I risk anything with running the engine like this? Should I do another leak down or perhaps an additional compression test? Or should I stop talking, pull the plug and start restoring the power unit?
Your input are appriciated as always !!
Ulrik
'67 250 SL Papyrus White 113043-10-000023