Author Topic: Toyota Yaris coolant change question  (Read 669 times)

Offline George R. Young

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Toyota Yaris coolant change question
« on: January 03, 2019, 05:18:51 pm »
I know, it's not a motorcycle, but it's almost as small.

After 10 years, I'm supposed to change the antifreeze. There are supposed to be 2 drain plugs (see pic), one for the radiator, one for the block.

Found the one on the rad. Can't find the one on the block.

Anybody can point me in the right direction?
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Offline gPink

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Re: Toyota Yaris coolant change question
« Reply #1 on: January 03, 2019, 06:09:23 pm »
Looks like it's just to the left of the 'Radiator Cap Sub-Assembly'.



sorry George, couldn't help it  :)
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Offline George R. Young

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Re: Toyota Yaris coolant change question
« Reply #2 on: January 03, 2019, 08:49:50 pm »
Ho, ho, ho. 'Tis the season to be jolly.

So I trudged down into the dark garage again to answer my own question.

The block drain cock location in the manual is just a hint. It means 'somewhere on the block to the left of the Radiator Cap'. In actuality, it means 'on the back of the engine block, conveniently under the exhaust headers'. I can snake my left hand in there but can't see the thing from any angle.

It seems further planning is necessary.
65 CB160 (67-69), 69 350GTR (69-72), 72 R5, 73 RD350 (73-84), 82 XZ550 Vision (84-03), 01 Concours C10 (03-), 89 EX250 (11-14), 00 SV650S (14-16)

Offline Cholla

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Re: Toyota Yaris coolant change question
« Reply #3 on: January 04, 2019, 01:49:26 pm »
Just drain, flush, drain and refill. Don't over think it.
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Offline VirginiaJim

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Re: Toyota Yaris coolant change question
« Reply #4 on: January 07, 2019, 10:11:36 am »
I wouldn't worry about the one on the block.  Do what Cholla says to do.  Or you might be able to get one of those Prestone flush kits that go in the heater lines (I think).  It's been years since I used one of those, though.
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Offline Cholla

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Re: Toyota Yaris coolant change question
« Reply #5 on: January 08, 2019, 09:19:59 am »
I wouldn't worry about the one on the block.  Do what Cholla says to do.  Or you might be able to get one of those Prestone flush kits that go in the heater lines (I think).  It's been years since I used one of those, though.
Be careful using one of those kits. You can blow out the heater core using too much pressure from the garden hose.
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Offline VirginiaJim

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Re: Toyota Yaris coolant change question
« Reply #6 on: January 08, 2019, 02:44:15 pm »
Been using them for years without issues from well and municipal water systems.  However, if your municipal or well system has fire hose pressures then I would be concerned enough to not use that kit or flush the system directly without a pressure reducer.
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Offline Cholla

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Re: Toyota Yaris coolant change question
« Reply #7 on: January 31, 2019, 08:46:43 am »
Normal water pressure can blow the core even if it is not excessively high or turned on fully especially if the core is weak.
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Offline VirginiaJim

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Re: Toyota Yaris coolant change question
« Reply #8 on: January 31, 2019, 10:29:07 am »
If the core is weak and blows then you'll need to replace it.  Better to do then, than on the road.  I've been using those kits for years without any issues at all.
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Offline Cholla

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Re: Toyota Yaris coolant change question
« Reply #9 on: February 06, 2019, 09:08:37 am »
I have one on my 92 Dakota. Had one on anothe 92 Dak.
I yar r on tee I have the cleanest 92 Dakota cooling system in the werld!

New rad, heater core, wasser pump.
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Offline VirginiaJim

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Re: Toyota Yaris coolant change question
« Reply #10 on: February 07, 2019, 03:36:38 pm »
I had a 91 Dak.  Sold it in 2016.
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