Yes dmx999. I guess the same.
Brother if you follow the following link, you'll clearly see that XLI 2007 engine (2NZ-FE) has hydraulic tappets (item 13751). These dont need to be adjusted periodically. They automatically adjust based on engine requirements.
But there is a catch, over the passage of time, they do get clogged (because they operate on engine oil). Or may be the spring inside them looses its tension. So you normally have to service them in that case.
Note: With hydraulic tappets, KHURRAD work is only required if they get jammed totally. This can happen due to end of their running life. Or not changing the oil in time. Anyways their problem can be identified based on engine noise and their actual condition when u open up the engine.
The meachnic opens up the engine, removes these tappets, dips them in mobile oil and sqeezes them, they should plunge and extend when he removes the force. In that case, only their service with patrol would be enough. No khuraadia stuff.
Hope it helps.