Buy two of 4QT (3.75L), 50/50 diluted super long life coolant from Toyota should be enough. If you decide to use other non-diluted, one of 3.75L. There is about 1L will stay in the engine.

 

So if i put 4qts in the radiator cap does that over flow it or not please help. Im new and trying to learn everything off youtube and google lol. I drained the radiator and put 4 qts back in it.

 

I just wanted to follow up to say that I used just over one 3.75L container - maybe 4L.
I opened the petcock and expansion cap, and let it drain for probably 20 minutes.

I closed the petcock, filled it back up, then cranked the heat and started the engine.
I let the engine warm up with the expansion cap off hoping to "burp" it. I also squeezed the rad hose a few times.

I've gotta say it's really not obvious to me as to whether or not there's air still in the system.
On cars with a rad cap you can see the bubbles surface and the fluid level drop, but I didn't see much of a change at all when the rav's motor warmed up.

Hoping for the best

 

Yes, I concur with myang001 - On my previous 2010 rav4 I used about 1.5 Gallons of 50/50 Toyota coolant for a complete fill. This was after a water pump, and thermostat replacement. Did a serpentine belt and tensioner replacement at the same time.

 

When I did mine about 2 years ago, i opened the rad drain plug, took the the rad fill cap off drained everthing from the system, refilled the rad with distilled water ran it for about 20 minutes cranked up the heat. Then done a second drain of the system, I purchased 4 litres of of coolant & premixed myself refilled the system took the vehicle for a test drive 20 minutes cranked up the heat, then home topped off the coolant all good and checked on the level a week later. I also flushed out the coolant reserve I forgot to mention.

 

My 2015 Rav LE has no radiator cap only a reservoir cap. Perhaps they added that radiator cap to the later models.

 

Weird.