issmonke with #2&6 reading 150+.i have just looked at my factory service manual regarding the auto lash adjusters for the valves
these are not adjustable/repairable
the manual gives a procedure for checking the free play; if there is no free play, then the lash adjuster must be replaced
I quote "check auto adjusters for free play by inserting a small wire through the air bleed screw in the rocker arm and VERY GENTLY pushing the auto adjuster ball check down. While lightly holding the check ball down move the rocker up and down to check for free play. if there is no play replace the adjuster."
Thus ends the lesson.
conceivably, if there is no free play, the valve would not seat properly and presumably, the problem would get worse as the engine heats up.
however this is an educated guess
a poorly seating valve will cause a misfire and a burned valve
your leakdown test would seem to indicate a burned or poorly seating exhaust valve
I see a reconditioned head or two in your furure
these are not adjustable/repairable
the manual gives a procedure for checking the free play; if there is no free play, then the lash adjuster must be replaced
I quote "check auto adjusters for free play by inserting a small wire through the air bleed screw in the rocker arm and VERY GENTLY pushing the auto adjuster ball check down. While lightly holding the check ball down move the rocker up and down to check for free play. if there is no play replace the adjuster."
Thus ends the lesson.
conceivably, if there is no free play, the valve would not seat properly and presumably, the problem would get worse as the engine heats up.
however this is an educated guess
a poorly seating valve will cause a misfire and a burned valve
your leakdown test would seem to indicate a burned or poorly seating exhaust valve
I see a reconditioned head or two in your furure
