Cylinder Heads 3.8 series 2 Rebuild time?
I am at 107k miles on my 97 and I know many have experienced higher mileage.
Question: Are these heads/valves/ stem seals/springs etc reliable to 200k+ miles without a rebuild..?
Or since I am about to do the UIM / LIM should I get them redone now as preventative maintenance?
My valves are not the quietest in the world right now and have been adding lubgard blue bio engine treatment to keep em shut up, which seems to work.
Just trying to get some opinions, have a local machine shop that can do the work.
They are a bit noisy when cold but seem to be fine once warmed up.
No smoke or anything..Compression test 2 years ago was fine..
1997 Buick Pk Ave (Soft Ride) Suspension!