Leaky Head? Leaky something?

So I noticed what seems to be a leak of some sort coming from my engine bay, and after inspection, it looks to me as if my valve cover gasket could be slightly leaking. I am not familiar with such a problem so I am not 100% on it. The leak is apparent on both sides as well as you can see in the pictures. And yes I know, I need to clean my engine bay.

Mind my fat thumb

 

looks like valve cover gaskets and spark plug tube seals to me.

You may want to check the torque on your valve cover bolts. They tend to loosen over time, as the gasket compresses, especially if you have really low miles [or] really high miles.

But the leaks starting mid-way, oil flows down, so if the leak starts at the perimeter of a coil pack openining, it's probably your spark plug tube seals. Someone may've already placed, and chose not to use OEM, or didn't install the replacements correctly. See here for more info on the process etc.

 

Torque will be checked when I'm done with work and class, and just an FYI I am sitting at about 190k currently.

 

Just know correct torque is in INCH LB, not FT LB and you're aiming for 53 inch lbs per the FSM which is in the ballpark of 4.5 ft lb if my math is on-point.

 

After a further inspection on this matter, I will replace my valve cover gaskets, sparkplugs, and coil packs. Would it be possible to get some help finding which gaskets to use? On the parts.toyota.com website, two different gaskets are available - one for the left and one for the right possibly? Just not sure and would love some input. Thanks!

 

If you're totally committed to doing coils, make sure and get Denso brand from rockauto and not scamazon. Parts store coils are not great.
If I were you though I'd only do the coils if you are getting misfires or having issues.

For sparkplugs I would suggest whatever plug the manual suggests. I'd also recommend staying away from unreliable sources for spark plugs. There are counterfeit parts on many websites. Rockauto is your friend.

 

LMK if this helps out: https://www.tundras.com/threads/valve-covers-fix-or-leave.105385/#post-2712883

 

What Shifty said. Easy job if you have some basic mechanical skills. I would not switch your coils if you’re not getting misfires. I would purchase new bolts that have the integrated rubber seal. Don’t overtighten and don’t forget the half moons. The fact you referred to it as a head gasket may suggest letting a mechanic do the job.