2007 V6 coolant replacement - Toyota RAV4 Forums
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#1 (permalink) Old 01-17-2011, 08:22 PM
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2007 V6 coolant replacement

Just finished changing out the coolant on my Rav. Just a FYI to those who attempt this, even when you drain the block you only get 1.3 gallons out. My car has the tow package and has nearly 2.5 gallon capacity. Not a bad job, but getting to the block drain is a bit tricky - got to take off the exhaust heat shield and go in from underneath. Of course, you have to remove the under tray as well for this job. Also, took a while to get the air out of the system. I used the bleeder near the fuel rail. It works well. Car has 72K miles and I'm not keen on the 'lifetime' fluid - especially with the potential for WP issues.
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#2 (permalink) Old 01-17-2011, 08:35 PM
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Did you flush the coolant out of the heater circuit too?

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#3 (permalink) Old 01-17-2011, 08:38 PM
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I have to do this in the spring. Is there two drain plugs on the block- one on each bank like a v8? Is there a nomal drain cock on the bottom of the radiator? Its very hard to look around in there without removing stuff just to see whats involved. I am skeptical that the dealer would drain the block.

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#4 (permalink) Old 01-17-2011, 10:49 PM
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Quote:
Did you flush the coolant out of the heater circuit too?
I would have like to, but disconnecting (or even getting to) the heater line connections is a PITA. That wouldn't have gained much fluid anyway. I'm just going to drain the radiator a few times and refill. I used the green fluid so right now it's not red and not green!

Quote:
Is there two drain plugs on the block- one on each bank like a v8?
On the 07 there is just one under the front exhaust manifold. I did see that the 2006 had a second one but the 07 does not.

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Is there a nomal drain cock on the bottom of the radiator?
Yes, under the right lower hose (while facing engine). You need to remove the under tray to access it.
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#5 (permalink) Old 01-18-2011, 01:08 PM
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Quote:
Originally Posted by arries289
Yes, under the right lower hose (while facing engine). You need to remove the under tray to access it.
I sure hope that this black plastic "tray" really serves a useful purpose as it seems to always be in the way and is a pain to mess with.

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#6 (permalink) Old 01-18-2011, 10:35 PM
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FWIW, I drained just the radiator tonight and got about 1.1 gallons out. Took a while for all to drain. At this point, I don't think the block drain is even worth the effort.

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#7 (permalink) Old 01-19-2011, 08:08 AM
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My method of draining & flushing cooling systems is to feed fresh water into the radiator filler with a garden hose with the engine running, heater on and the drain petcock open.
I adjust the flow so it just keeps up with the loss out of the petcock. I wait until the petcock flows clear and in 10-15 minutes I've flushed the entire system.
Then I turn off the engine and the hose and let the radiator drain. Close the petcock and fill the radiator with straight antifreeze.
With the water in the block & heater it usually comes out about a 50/50 mix w/o messing with heater hoses or block drains.

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#8 (permalink) Old 01-19-2011, 08:12 AM
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Remember that coolant is a hazardous material and should be disposed of properly. When flushing the block, all waste water must be contained. It then needs to be turned over to a proper waste disposal company.
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#9 (permalink) Old 01-19-2011, 12:26 PM
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Remember that coolant is a hazardous material and should be disposed of properly. When flushing the block, all waste water must be contained. It then needs to be turned over to a proper waste disposal company.
Yep, I catch as much as I can especially when it's undiluted. It goes to our Town disposal facility.

Another effective method when freezing isn't a problem is to fill the radiator with straight water and drive the car. Repeating the process several times flushes the system leaving about 5 gallons of waste antifreeze mix to dispose of.
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#10 (permalink) Old 01-19-2011, 03:48 PM
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Thanks for the advice arries289. Nice to know how little actually came out of the block. I was debating this myself and was leaning towards just doing a more frequent drain and fill of the rad. Now I know I will. I will use the Toyota pink though to keep it all the same. There is a link to an interesting article on the chemistry of the different colours of antifreeze posted by John E Davies somewhere on here.

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