Some air pockets can be a pain in the rear. But how much volume are we talking about? One air bubble? five? Twenty? My local technician did a drain and fill I told him i would take care of the bubbles. Two weeks later I added 2 ounces of coolant. Three months later I checked the level. Everything was perfect. We are not doing a main bearing overhaul here. It's just coolant.
If you aren't sure, look at your fluids. If they look grungy get them changed. All fluids go bad over time even if you don't put lots of miles on your car. Nobody wants that grungy crap in their nice car.

 

I am not going against you. I am just stating the probable causes. And just because it works on one vehicle, it does not necessarily will work on a different vehicle. We are all here to learn and what matters is the end results. If it works for you, continue to do what you are doing is all I am saying.

 

That is exactly correct. And only going to say it one more time. It's a personal thing. Look at where you live, how many miles you drive salt, sun wet cold and whatever. Do what's best for you in those conditions.

 

I use this funnel system and it works great. Replaced a radiator a couple of years ago on my Acura and the process was pretty simple with this funnel.

 

Just did a coolant drain and fill @63,000 miles. Coolant looked great, almost new.

I did not do the block drain that Viktor shows in his now gone video, but I got about 7 of the 9.5 quarts out and replaced. SLLC was $20/gal at local dealer....most online will no longer ship. So $40 and about 1 1/2 hours.

Took quite a while to get air out of the system. The upper hose is easy to get at but the lower hose is tough to get at so I removed all of the lower covers and getting them back on was the biggest pain. Take pics before you remove all of the bolts and plastic pins. Ran the heater and rev'ed the engine to remove most of the air.

I will check level in a day or two after I get some miles on it.

 

What is the coolant replacement interval on these? Thought it was 100k miles first time, and 50k miles the second time.

It does use the Toyota Pink Super Long Life.

 

yes, 100k and then 50k. And yes SSL.

I decided to do early just to see how it was. Cheap and easy and raining at home, so decided to just do it. I try to do my work on time or early if possible. Keep cars forever.

Next time may do the block drain if Viktor or CCN post the FKS coolant video.

 

IMHO, the block drain is totally unnecessary. It is for those that are OCD.

Also share us your experience if you have already change the spark plugs at 60k miles.

 

I am a little OCD. I never did block drain on any other car coolant change, so no worried mechanically.

Plugs are coming soon. Just picked up the gaskets for valve cover and for the throttle body. Have the plugs.

No rush on these since everyone seems to say that they can go 100k easily. I will probably do sometime this summer when the schedule is wide open for a day.

 

Awesome. Would like to see how your spark plugs look when you do yours.

 

I will take a pic and post when I finish the job.

 

2016-2022 Lexus RX350 Engine Coolant Drain And Fill Instructions
https://www.dropbox.com/s/o7a24stgvn...ions-.mp4?dl=0

 

https://www.lexusrx.net/1457/coolant.html

 

I will take another look for the block drain next time I am in there. Have to watch the Viktor video again b/c I thought that the drain was toward the rear, but this pic looks like above the transmission where I went looking last time.

Not sure that it matter much but worth the look.

thanks

 

I posted that for anyone who is interested. But for me, I will skip the block drain.