How To Repair 2004-2009 Toyota Prius Coolant Heat Storage Tank Bottle Container With Pump Connector

1. 

   I may be exposing myself to ridicule here, only in grooming for changing the coolant in my 2008 Prius (note that I live in Australia- right hand drive here), I have been reading up on the helpful articles, just- I cannot notice the storage tank! I discover that it was discontinued in the Gen Three model. - is information technology possible that it was removed for the after Gen 2 production? I'd greatly appreciate some aid on this one. Note that I have partially removed the LH wheel arch liner, etc to endeavour and find it. It does non appear to be on the other side either.
   

2. 

   Joined:

   Jan 2, 2008

   82

   28

   0

   Location:

   Malaysia

   Vehicle:

   2007 Prius

   Model:

   II

   Hullo David,

   The UK models did non have the coolant thermos system, so It's possible that your version does not accept it.

   Regards,

   Phil

3. The engine coolant estrus recovery system is a North American 2G characteristic, like the fuel tank with the flexible bladder within. Be glad your car has neither of those features.

4. 

   Thanks for the response Phil- it seems Australia is the same.
   Thankyou Patrick for the confirmation. Information technology seems we were blessed down nether!Patrick, can I ask you- this would mean that in that location is no electrical connector to disconnect for this job at all- correct?

5. I believe you are correct. To bleed the engine coolant, only open the ii bleed cocks: one on the engine cake, on the side facing the firewall; and the other at the radiator. (North American models have a third drain erect at the coolant oestrus recovery system canister.)

   Please continue track of the corporeality of drained coolant, and mail. You also need to know the amount of drained coolant and then that you'll know how much new coolant y'all demand to add to the system before y'all can declare victory.

   If you leave the radiator cap on while the engine coolant is beingness tuckered, that should create a vacuum which will suck the coolant out of the overflow reservoir.

   The radiator has a valve on the top which you tin open to allow out trapped air, equally you are adding new coolant. Information technology requires a 6 mm hex key to open. After you remove the black plastic comprehend over the radiator, look for a hole in the sheet steel covering the radiator. That should exist the location of the valve.

6. 

   Would this be a good method to make up one's mind if the arrangement is total? Many have a problematic seeping water pump (not knowing of course) this tin can reduce the level of coolant and if the removed coolant is the measuring method, it may be off when you refill.

7. 

   Joined:

   Jul 17, 2022

   3,318

   i,091

   0

   Location:

   Houston, TX

   Vehicle:

   2013 Prius

   Model:

   3

   The OP should consider he is blessed past not having the thermos bottle. It just creates more havoc when changing the coolant as he is doing. Only needed in The states to run into EPA spec'south IIRC.

   Agree with Patrick, mensurate out how much coolant comes out. You should refill with the same amount. Don't forget to bleed the air out of the system. Otherwise information technology will overheat.

   Practiced luck to you lot davidls and Welcome to Prius Chat.

   Ron (dorunron)

8. 

   Thanks over again Patrick- some skillful tips at that place.Thanks Ron- this is a great resource, and I'thousand very grateful to you all for creating and running it.

9. "...if the removed coolant is the measuring method, it may exist off when you refill."

   It is true that this assumes the radiator and the overflow container are both full, to commencement. If they are non, this should be deemed for when filling with fresh coolant.

   Open the radiator cap every bit the first stride, to see whether the radiator is total. And then replace the cap earlier draining coolant, and so that the old fluid from the overflow container will be sucked out during the drain process.

10. 

    Thanks so much Patrick. I accept now completed the job, and it went well, with no problems. A couple of things that may help others who are going to do this job-
    one. I needed both 1/four inch and three/eight inch flexible hose sizes.
    2. Exist careful that when filling the transaxle coolant tank to not cascade it in as well quickly when topping up. I institute that I was losing it out the overflow- and didn't realise it until I looked nether the car.
    Good luck!

11. 

    I may be opening myself to ridicule, both for my ignorance and for being a Prius 5 interloper, but I am also a former GII owner. I never had whatever problems with the coolant themos and wonder why there seems to be such antipathy towards information technology. I have wondered why my 5 does non have this, as I idea it a overnice feature that helped me take a warm engine asap each morning. Was it unreliable or only a pita when doing coolant changes without going to a dealer?

12. 

    I must acknowledge the thermos tank is something that baffles me. "luckily we did not go them on the United kingdom of great britain and northern ireland Prius".
    If the coolant in the thermos is hot or warm at showtime making the Prius prepare, and it is pumped into the engine that means the cold coolant in the engine cake must pushed back into the thermos. When yous turn off the Prius the hot coolant in the engine is pumped into the thermos pushing the common cold coolant in the thermos back into the engine "cooling the engine prematurely" If the car is then started later on a curt flow the coolant is swapped once again serving no useful purpose "in fact the engine would be warmer if the system had not changed the coolant. Farther I cannot believe that after say 12 hours of being parked apart from in the very hottest of climates that there is whatsoever even warm coolant in the thermos.
    If the car heats the coolant in the thermos while running that would be twice equally much coolant to oestrus making the warm up longer. I can see there are situations where the warm up would be quicker, "say afterwards a couple of hours after the car was turned off" only and then you still have the downside of conveying round the extra weight of say ane gallon of coolant, the thermos, brackets,and pipework, the pump, and control valve.
    Am I missing something in the system as not having it on our Prius I am not able to examine it.

    John (Britprius)

13. 

    I don't think information technology worked that way exactly, although I'1000 not sure. Information technology was my understanding that when emptied, the thermos was exactly that, empty. So all that is happening is that the warm coolent is pumped into and out of the engine when starting or stopping. I'm not really sure why they would need to, or want to for that matter, exchange coolant rather than just movement it.

    The benefit I saw was that the engine was up to temp much, much faster at the cease of the work day (9 hours) and quite a bit faster in the morning (xiv hours.) I saw no do good at all that I could observe after a twenty-four hours off (38 hours) or longer. Again, if no 1 else noticed a do good it may have been placebo, although I kind of incertitude that. I could certainly buy that it was a mechanical complication that was no longer needed to run into a mandate, peculiarly if information technology was a characteristic that no i valued.

14. 

    I am not proverb your wrong as I have no manner of checking one mode or the other, but the US coolant capacity is near double that of the UK system. Further emptying the engine of coolant could give ascent to many problems with air locks and problems with hot spots "cylinder head" if the coolant was removed say on a hot day afterwards a steep clime.

    John (Britprius

15. 1. The coolant estrus recovery system canister is kept full of coolant at all times. While the motorcar is in operation the engine ECU volition open the engine coolant valve as necessary to route hot coolant either to the heater core or to the canister or both. When the car is made IG-OFF the CHRS pump volition run, presumably to give the canister a final shot of heated fluid. When the car is first fabricated READY the pump volition run to circulate the heated fluid from the canister to the engine while the cool fluid moves from the engine into the canister.

    2. The canister holds ~3 quarts and the capacity of the entire organization is ~9 quarts so having 1/three of the fluid relatively hot does provide some advantage to warming up the engine, although I personally think the complexity of the system outweighs any do good.

    3. US owners get the faster warmup benefit and pay for that benefit with increased engine coolant system complication, potential failure of the coolant valve (which has been reported fairly often) and a noisy CHRS pump (which continues to role, only is but noisy.) The engine coolant system is non easy to purge air out of because of the CHRS organisation.

    four. California 2G Prius owners and other owners living in states that follow CA emissions standards are the winners because the CHRS system is role of the avant-garde technology equipment that qualified the 2G Prius for AT-PZEV rating and as a issue, the longer x year/150K mile hybrid system warranty.

    nsfbr and Britprius like this.
16. 

    Patrick thanks for the summary of the thermos system. I take it from your avatar that yous live in a hot climate, and this must assistance. I wonder how how much estrus is left in the thermos say in a Canadian winter afterward 9 hours outside in -20 and lower. I recollect the gen3 frazzle oestrus recovery a much improve system, but obviously this is later thinking past Toyota.

    John (Britprius)

17. 

    Thanks for the info. I estimate I was just lucky that on my Gen 2, I never had an issue with it for >$160k miles.

How To Repair 2004-2009 Toyota Prius Coolant Heat Storage Tank Bottle Container With Pump Connector,

Source: https://priuschat.com/threads/coolant-water-storage-tank-cant-find-it.142771/

Posted by: mullinspriont.blogspot.com

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