RE: H3 Cylinder Head replacement
They must have given you a receipt with the work done. Tell them your current problem and take it back, ask for the service manager and tell him you want to see proof they replaced the head by having them show you thier paper work proving they ordered the head and thecast numbers on the new on. They are date coded and would hve to be menufactured after March 31, 2006 tobe the new hardenedvalve seat version of the head.
Or, better yet, go to a different dealer and tell them your story and ask them to check it out.