vg30e timing help

[xcrunner2616]

vg30e motor. i have had a timing noise for a while and i today decided to do a leak down test. i feel good with my rings and bottom end. but when i am getting some leak on a few of the cylinders from the intake. i have a few questions.

is it possible my timing is off slightly causing the intake valve not to close fully?

if the timing has jumped is it more likely that i have bent my intake valves?

do you think i would be ok with just doing timing or do i need to pull motor to check the head?