lexusisgs

Went first to dealer,and price was about $250 for coolant replacement.couple other small shops asked about $140-$170 .
So I didn't have choice than to do myself.
Another task that was successfully completed

lexusisgs

Step one was to get all tools and coolants you need.

Most important tool here was spill free funnel.it comes with fittings for more cars.
Step2
Carefully remove radiator cup.here use Caution because coolant is under pressure and very hot.

Radiator cup removed ,top view.

When cup was removed,we inspected spring for tension and rubber seal ,just in case.

Step 3 Locate drain valve on the bottom.i did attached some hose in order to avoid coolant spilling around.

Bottom view with hose attached to drain plug.
Step 4 was to start draining coolant
I took one measuring pot to collect old coolant and to simply see how much drained out.

lexusisgs

Make sure top radiator cup is removed.

Overflow pan ,I did leave closed. Later on you will see how to get rid of old coolant in this bin.

Time for collecting old coolant

Just take your time,get safety glasses and safety gloves here. Remember safety first Very hot coolant coming out.dont burn yourself.

I have measured one full bin first.

Next step after coolant stop leaking close plug .hand tight ,no any tools here to use.

Next step was to remove hoses from overflow pan.

Use rachet10mm to remove 2 screws ,which are holding overflow pan.

Very slowly remove this bin Warrning on the very bottom there is plastic kind of pin used to center overflow pan , don't brake it. Just pull up all pan.

lexusisgs

Here you can see what is behind after overflow pan was removed.

Lubricate removed screws,because next time will be easy to remove them.

Now be gentle and drain all coolant from overflow bin into collecting , measuring bin.

Here is that mini plastic leg ,that u don't brake it.Be very carefully here.

After you drain coolant you can clean overflow pan with brake cleaner or just hot water Dry it and put back in reverse order.

Put back overflow hose and here you can add some fresh new coolant .

This is magic moment , attaching spill free funnel. Make sure it is tight fit.

Very very close up of the funnel. Here you can pull up handle to open bottom for new coolant.

Now pure all slowly into funnel. Remember this all time engine was OFF.

I have put new" freshly squeeze" pink coolant in measuring bin just to compare how much was before.

lexusisgs

Nice super pink fresh coolant. Very healthy colour of coolant.

Nice close up

At this step wait about 10-15 min.to gravity do magic for you.most of the coolant will go in radiator.if level dropped down add more coolant. Please do not overfill yet.

Here I just put car in accessorie mode ,not starting the enginge. I was trying to activate water pump using tech stream software...but....but...


Did selected active mode and guess what happened......

I was thinking I can energized water pump to start recerculating new coolant but pump was not moving due to error message I got on screen.
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No idea how this happened. So I use plan B ,to burb the system.

lexusisgs

Put engine in maintenace mode and start runningp M.mode was very simple push button twice ,foot of the brake. Push gas peddal twice Put in NEUTRAL push gas peddal tvice Put back in park psh gas peddal twice and you can see msg on dashboard..now hit brake padal and push the start button. Engine will start at this step

I was observing how bubbles coming out in funnel.

When bubbles were gone .now was time to blast heat on to get any trapped air from core.

Open windows and blast the heat.
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Screwdriver used to make sure funnel stays open during this step.i was giving extra push on gas peddal .reving engine about 25000 RPM.

I did switched button to SPORT mode to get tach meter for easy reving.

Fan still was off after 17 min.running.

This was very long step time wise ,almost 20 min. At this time I was observing cooling fans on radiator hoping they will go on and open thermostat and blead the rest of system

lexusisgs

This step was hot...... Very carefully squeeze bottom and top hose couple times to get air out . Warrning coolant at this stage was very hot use protective high heat gloves.

No bubbles in overflow pan.no bubbles inside funnel ,so that means all air pockets are out from system

Now turn off the engineering and wait couple minutes ,very slowly remove yellow funnel which you plugged with middle handle to prevent coolant spill.put back original radiator cap and that is it.
O yes one more thing �� Check level in overflow pan and make sure it is at MAX level. Recheck level after couple days and enjoy. This was just for educational purposes only. Do at your own risk.

lexusisgs

This all burning air procedure for me was about 23 min. I did timed myself.
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Double check radiator cap for any leak .
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lexusisgs

lexusisgs

I hope this will shed some light on coolant replacement on hybrid cars.
I think next interval for replacement will be 100 000 miles.for me
Cheers

AlexNY

wait a second, you have a lift in your garage????

ESh

Nice DIY.

What’s wrong with the Techstream?

NdYAG

First of all - huge thank you for posting this. I am planning to replace the engine coolant in my 2014 ES300h very soon (car is at 103k already).

Attached are the instructions that I have downloaded from the Toyota techinfo resource.

Also, according to my info the 1st engine coolant change is due at 100k and then every 50k thereafter. Similarly the 1st inverter coolant is due at 150k and then every 50k.

gamma742

I would like to see an inverter coolant change since you have a lift and enjoy self maintenance

lexusisgs

I I have use my friend garage to do this myself.
Invertor coolant I did posted thread before.
I don't know what went wrong with tach stream must be some software glitch.

Thank you all for interest and replay and your time reading this.