serenity
Moderator
Haven't check the valves yet. 20k old since rebuild, new 20k old genuine head also. How do I test for a vacuum leak ??
Comp test 460-430 across the 6. Which is definitely good considering its 20k old motor. Leak down tested in the 15/20 % which is in the good range.
Yeah that's odd for it to have bad blow by then, maybe just close up the flaps in the rocker cover some more, these engines are notorious for blow by.
Not sure what the easiest way to test for a vacuum leak on these things is, other than have a visual of all the hoses as there aren't many.
I only say it as a possibility as I had a vac pump in my hands the other day and noticed that it discharged into the crankcase. So if there is a leak somewhere it will just keep pumping air in there and pump harder at high revs.