How to change/flush the coolant in the Toyota MR2 MK1 (AW11)

A step-by-step summary of what to do to flush the coolant system in the Toyota MR2 Mk1. This is a long process and must be done thoroughly to ensure that the old coolant is completely removed.

[@jimsgaragetoys]

What about doing multiple drain and fills of the radiator un till the coolant looks new? Every drain and fill would improve the percentage of new coolant in the system and you wouldn't have to mess with anything else.

[@andybateson]

Cheers Gray, just the ticket!

[@awong160]

The AW11 has such a PITA coolant system. Thanks for the video, wish I had it the first time I drained the system. I found it much more difficult to fill and bleed the system though.

[@andybateson]

Hi Gray, useful vid, many thanks. Would be good to see one of bleeding the system also as most people will need to do that right after this step. Your method may not flush the cabin heater coolant pipework, so I'm trying to figure out how to attack that. I'm working on an idea to force water pressure into one of the pipes at the thermostat as the entry point - it should then circulate the heater pipework and exit again at another unhooked pipe close to the thermostat. Hopefully that'll get it. Those drain hoses you find in the frunk are actually for the bleed process rather than the drain process - some mk1's will come with short hoses on the drain points for this purpose. Keep the good vids coming!

[@RotaryRebuilder]

already made a vid for that Bleeding the cooling system

[@mattmatulich6427]

nice video, but you need to make it were it can be seen...too dark... thanks,

[@RotaryRebuilder]

you need to properly fill and bleed the system to make sure there is no air. I will make a video on this once I refill with coolant, right now I just have water in the system

[@mustang69m1]

It is best to change out your thermostat as you do this procedure!

[@ChroniclesofKToyoda]

Is this AW11 am Automatic?? How allusive especially in that colour!!

[@vincethefunk]

Did you relocate your battery to the frunk? Could you do a tutorial on battery relocation?

[@RotaryRebuilder]

I already made a video on this. Battery Relocation Toyota MR2

[@alejandrocuriel651]

My friend I’ve been fushing the coolant system of my mr2 for 4 days because I swapped the engine. There are no bubbles in the system anymore, after I turn the vehicle on, after a few minutes it overheats. The thermostat is out. I don’t know what to do. It’s frustrating?

[@girthydumpsterfire6920]

Did you put the thermostat back in 😭

[@Tirso99128925]

nice video.. very helpful. anyone knows how to get the manual? thank you very much.

[@sotektechnical439]

most local auto parts stores can order it for you. that's how I got mine.

[@josephreyes7084]

Not sure why you would take out ac instead of take out thermostat.

[@antoan7758]

"Little white thing you can see" - Shows VOID of HELL

[@reyaleja6671]

Sorry. can't see nothing!