you might want to find a new dealer, since you cant torque your valves. also, it should take your dealer the better part of the day to check the problem which is a loose cam gear bolt(s). the front part of the engine must come off-timing cover, oil pan etc.sautter said:Dealer told me of a recent Service Bulletin. Some Engine valves were not torqued correctly. Could cause engine problems at high speeds. I am having mine checked tuesday. This could be a serious issue. Check with your dealer.