Ticking is one of the indicators there is a problem. Another pull all the spark plugs and check for oil around the the threads. If the valve is moving beyond specs. the valve stem seal will leak oil past it and show up on the plug threads. You really need to check all the plugs as some may not show the problem. But the sure test is take it someone and check the valve movement with a dial indicator or similar tool.Let's get to the bottom line. How can you definitely tell if you have a valve guide problem. Other than hearing a ticking noise which could be from another source is there a way to check for this? I'm looking for a test that may be something like taking off the valve spring retainer and spring and checking play between the stem and guide.
PS Mine is an early production date 2008 with 19K miles. Had the valve guides checked today and they are all within tolerance. So not all are bad as some are trying to say on the other forum. But for peace of mind, I recommended checking them.