Pontiac Grand Prix Cylinder Head Replace/Remove

When Installing The Cylinder Heads Rocker Arms, Do The Engine Have To Be In Top Dead Center? The Step Procedures I Have Does Not Indicate.

I Purchased This Car Less Than A Year Ago. Somebody Put Stop Leak In The Radiator And It Was All Over The Radiator And In The Engine. We Had...

I Have A 1998 Pontiac Grand Prix V6 3800. Not Turbo Charged. My Dad N I Recently Bought The Car . The Previous Owner Said The Heads Were...