There are, BUT there is no need to disconnect the coolant lines. Here, watch this (this is the ONLY vid I recommend watching before tackling this):

 

Is the spark plug video for an ICE only or does it also apply to Hybrids?

 

I also recommend the above video. I followed it exactly and it was a breeze. You will disconnect a lot of hoses. I recommend making a list as you disconnect and check off each as you reassemble. Take some photos before you remove anything.

 

Thanks for the reply, I watched the older video, I also watched this one, I thought it might be possible to leave the throttle body attached and not mess with the gasket , guess not.
Geo🇺🇸

 

No, you need to replace both gaskets which is not much $.

 

Hi, trying to order the gaskets and it appears there are 2 pieces to the intake manifold, is that correct?

 

Those are not the gaskets you need. You need Toyota part number 17176-31130 (aka: Air Surge Tank To Int Manifold Gasket).

 

Correct

 

man, i have a 2nd gen 3.5 with the 2gr-fe and if i didnt have the one bolt in on the back side of the manifold, it would have been a breeze

 

Yep, this is similar to the plug replacement in our old Sienna van. I've found the plugs release easier, when removing them, if I have the vehicle warm, but not hot, before starting the job.
I, also, don't squeeze the clip on the coil when removing, they are known to break when they are older, especially the ones in the back where it's hotter. Instead, I use a pick and lift up the tab from the lower-part then pull them off....haven't had one break yet. (My friend did this job in his old Sienna and broke 3 out of the 6....and you have to replace them, which makes an easy job an all-day job....so have some spares handy, thankfully I gave him some spares.)

 

Thoughts on spraying PB Blaster around plugs before attempting to remove them .
Geo🇺🇸

 

No. No need for that. Plus that can creep down into the cylinder.

 

That’s why I asked, I thought about creeping, how about Never Seize on the threads at install?

 

In all the years of doing spark plug changes, I never used any anti seize and never had issues with removing a plug. I always use the rule of thumb is shiny plug threads = no anti sieze. NGK and most other plugs are coated and no anti seize is needed.

 

Thanks, I just read that online.
Geo🇺🇸

 

youve never worked on my 01 audi tt then.. lol
took 2 days to get the plugs out without snapping them.
had to (partially) fill the plug wells with pb and do a fraction of a turn, wait, fraction of a turn, wait...
they were the stock plugs from when the car was new. i THNK it had just over 100k mi when i changed them.

admittedly, that was the one and only time i had that issue.

 

DONE,! After about 2 1/2 hrs job is complete, really not all that difficult especially after watching that video.
Cheers!
Geo🇺🇸

 

I'm no expert but still know few things I would say from all vehicles I've seen an came across old or new there's not suppose be any coolant lines going to or near throttle body there might be other kinds cable's an hoses connected to it e round it coolant lines generally run to radiator and back down to freon bottle also towards back wall of vehicle some have black Styrofoam on coolant lines while others don't coolant lines are usually silver or aluminum looking* zena

 

Your Highlander DOES HAVE A COOLANT LINE going to the throttle body.
.
This is a common feature on many vehicles, including Toyotas, where coolant is routed to the throttle body to prevent it from freezing in cold temperatures. The coolant warms up the throttle body, ensuring it functions correctly even in freezing conditions.

Just remove the throttle body bolts and lay the throttle body to the side WITHOUT REMOVING the coolant line from the TB. Then, remove the intake plenum to gain access to the spark plugs on the rear bank. When you reassemble the throttle body, there will be no need to add coolant or bleed the cooling system since you did not remove the coolant line.