Now that I have my cylinder heads out of my V6 Tacoma, I am considering taking the valves out to inspect them in case they are bent or whatever and grind them.  There is no symptoms of valves malfunctioning.  They are sealed closed fine.  I was just wondering if I should do it since now I have easy access to it?  E.g. if I took them out and cleaned them and the housing, will it enhance the engine performance?

UPDATE:  What caused me to consider this are the carbon-gunky final segments of the intake passages inside the cylinder head that leads to the valves (what is the proper term for that?) and by looking inside, I could see that the same gunk was collected on the inside of the valve (wide end that actually closes the opening).  I cleaned those with a toothbrush sized wire brush and Seafoam.  Here is what they looked like:

Dirty:



Clean:




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Answer: Use a title attribute.

&lt;input type='button'  value='Press me' title='This is my title' /&gt;