Well my car is waaaaayyy over due for a valve adjustment, has not had one the 5 years ive owned it. The last time i checked with toyota it was going to run $600+ to do it and i know you can get a new head for a little more than that. Im planning on changing the timing chain, guides, tensioner, sprockets while im at it and the oil pump. Now the question is this. Would it be a good idea to change all the bearings and the piston rings since the head will be off? The car has 140k+ miles on it.
thanks in advance