Girlfriends Lexus started omitting an oil smell and a tapping noise from engine?

Sorry, it wasn't allowing me back on. It has about 88,000 and shes had all maintenance done regularly. I was looking at it and notice oil on the backside on passenger side. I cant see where it's coming from but it has to be near the top on the back. its moist with oil residue going down one of the heater lines it looks like, but not enough to cause a drip to the ground. I also heard of a recall on this year and model of a possible lifter or valve problem? Is this accurate? Thanks for the help!

Try cleaning the throttle body on the inside with a good carb clean See if it makes a difference Use a clean rag then spray it with a good clean carb then wipe it inside the throttle body

Thx, ill clean that out and keep u posted on the results. Thanks again for the help!