IF your guides are completely intact and IF you see no evidence that some chunks of aluminum have parted ways from the timing cover you can get away without pulling the pan - and without cleaning any sludge from it.
Yes, you can get away with not changing the HG, but they do have a service life, and I'd rather replace one on my time table than its time table.
22R and 22RE longblocks are identical for a given year.
Heb Dduw, heb ddim; Duw a digon
I'm that gun-totin', farm-raised, evangelical, pro-environment, OHV ridin'/drivin', Southern civil rights pro-labor Liberal yo' momma told you couldn't possibly exist.