The engine seems pretty bullet proof. Well maintained is good and honestly, I think your PO would have had to have been an idiot to do something that would affect the lifters. Having the correct oil seems to help a lot of this.
Pulleys will also make raspy sounds intermittently...check belt condition and make sure the tensioners are holding belt flat between pulleys.
And to clean things up generally, Techron--the only additive my car has seen.
In NJ--Tierney's in Montclair, Sept. 25, 7:30 p.m.
In NYC Sat, Sept. 30, 8 p.m. at Broadway Comedy Club! Sat, Oct. 8, 6 p.m. at Greenwich Village Comedy Club.
Comedy can be a great cheap date!
Mangofy your E46!