Any Prius Mechanic near Atlanta for Engine Coolant Change?

Discussion in 'Gen 2 Prius Main Forum' started by rogerthat, Nov 24, 2021.

  1. rogerthat

    rogerthat Member

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    Since changing the engine coolant on the gen 2 appears to be a tricky process and is best done with an airlift kit, I'm looking for a local mechanic to do this for me. I've considered just taking it to the dealer, but I've had some marginal experiences with them. I know there's a Toyota hybrid repair shop, but it's miles away from me and some of the reviews I've read are worrisome. So does anyone know a private Prius mechanic in the Atlanta area?
     
  2. Tombukt2

    Tombukt2 Active Member

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    Tricky to change the coolant for the radiator engine or the inverter actually both are pretty straightforward The inverters more tricky than the engine is for sure so I don't know what you're doing The coolant for the engine is silly straightforward about like any other Toyota I've done my Gen 2's and 3's right here in the driveway a couple of minutes drain it all out completely sometimes I flush and refill with the Asian 50/50

    SM-A715F ?
     
  3. rogerthat

    rogerthat Member

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    You sure you're not mixing them up? The inverter loop by all accounts seems like the far easier procedure. On the other hand, it appears that it's relatively difficult to get the air bubbles out of the engine loop when changing unless one is using an air lift and/or techstream. I've read of the paper clip trick to cycle the pump, but I'd rather just find someone who has the experience/equipment to do this without issue.
     
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  4. bisco

    bisco cookie crumbler

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    get a price from a few dealers, you never know
     
  5. Tombukt2

    Tombukt2 Active Member

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    Some people undo the wrong plug when they're doing the inverter but and then they wind up doing the transmission and the inverter which is what I do when I do it The coolant loop that goes through I guess MG1 and MG2 or something down there but there's a lower plug on the tranny you take out and all that coolant drains out

    SM-A715F ?
     
  6. edthefox5

    edthefox5 Senior Member

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    Inverter is easy done it 3 times in my driveway.

    But Engine coolant is very difficult and full dump is not the way to do it.
    Nothing but trouble and the people on this site having the most trouble never had a scan gauge too. Had no idea if the engine was over heating from airlock.

    Just dump the rad a few times.

    With engine cold open the rad cap and on the bottom of the back of the rad on the drivers side is the rad dump valve. Open it up dump the rad close that dump valve fill it backupwithtoyota LLC. Do that few times over the years.
    Dump the old coolant into the toilet.
    Done deal.

    No airlock no drama. Just check rad level a few times after car has been driven and cool keep coolant at the top of the neck.
     
  7. rogerthat

    rogerthat Member

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    Hmm, this sounds like my type of service! However, a few questions.... If I open the drain valve on the radiator, surely some fluid from the heat coolant storage tank will drain out? Using this method, can air still be introduced into the loop? If so, do you do anything else, like activating the pump, to purge the system of air?
     
  8. Tombukt2

    Tombukt2 Active Member

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    This will be a joy to you if you ever have to do some motorcycles or power sports equipment working on their ABS brakes or cooling systems are very similar to the prii. I guess that's why I don't have any problems with that stuff because it's just like working on bombardier road tax power sports equipment smaller coolant hoses long runs ABS systems with accumulator pumps that wind and make noise and do all the same things makes sense to me

    SM-A715F ?
     
  9. alftoy

    alftoy Active Member

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    Service manual pages
     

    Attached Files:

  10. Tombukt2

    Tombukt2 Active Member

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    Yep that's it see my fender liners and stuff like that or trimmed and cut out so I just reach under there and open these things and I'm not having to remove every little clip and screw matter of fact I'm looking for a nose for my Gen 2 like I would have on my Corolla or something or one piece stick on thing that I can take on and off in a matter of seconds when I want to yeah needless to say I haven't done much with that I haven't had the time but that's I'd like to find a nose that gives me quick access One of my '04s doesn't even have a rubber nose on it I just drive it around with the metal bumper running across the front that piece of aluminum and you can see the horns and the catch can or the you know tank for the coolant and all that stuff just sitting there that car doesn't drive anymore so it's a parts car but I drove it around like that with no nose on it for a long time and I would like to find a nose that's a one piece like fiberglass thing eliminates all those fender liners and all that nonsense

    SM-A715F ?
     
  11. edthefox5

    edthefox5 Senior Member

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    Has nothing to do with the CHRS system. Take cap off rad. Open dump valve. Let it drain. CLOSE dump valve. Fill it back up with LLC.

    Open the rad cap with engine cool next few days keep it filled to the top of the rad neck.
     
  12. rogerthat

    rogerthat Member

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    Thanks, I think I'll try this method. Is it necessary to remove any of the plastic shields/panels to access the radiator drain plug? Also do you attach any tubing to the radiator drain and if so, what size?
     
  13. Tombukt2

    Tombukt2 Active Member

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    I can usually reach my radiator drain plug from above open the radiator reach down undo the dump which is the radiator drain plug you don't have to take it all the way out it'll just hang there and squirt the stuff right into a bucket or the dirt if that's okay where you live and that's the happening when you fill it up I recommend personally what I do is fill it up till it's very high on the neck but not level almost dropping down the return tube I let the car run a few minutes while I'm goofing off see if it goes down it usually doesn't it actually starts to rise a little I put the cap on as that rise starts to occur somebody's sitting in the driver's seat maybe holding the gas down for this vehicle and then I hop in the passenger seat and we go for a ride get everything nice and warm when I stop to get a Coke or whatever I check the levels I look at the tanks usually actually the car is not super hot so I'll crack the radiator cap it'll whoosh take it right off nothing spews look at the level of the water it's about where I left the house same so I leave it put the cat back on and we continue on and we're done

    SM-A715F ?
     
  14. edthefox5

    edthefox5 Senior Member

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    There is no under shield over the back of the radiator. You do have to fish your hand around some small hoses to open the white dump valve.
    It’s plastic be nice to it.

    no hose required.

    just need a big container like you use for oil changes. Done this maybe 4 times over 14 years.

    Just watch it Over a few days keep it at the full line.

    G2 is easy on the Ice coolant but hard on the Inverter fluid. That’s just as easy to change.
     
  15. edthefox5

    edthefox5 Senior Member

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    Worlds longest sentence and impossible to read.
     
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  16. Tombukt2

    Tombukt2 Active Member

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    But you'll do it or you'll pay somebody to do it

    SM-A715F ?
     
  17. rogerthat

    rogerthat Member

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    Shouldn't be any issues draining it with the front two tires up on ramps? Do you disconnect the CHRS pump (the one attached to the coolant thermos)?
     
  18. dolj

    dolj Senior Member

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    No.
    I did, but i guess it is not strictly necessary if you don't mind a bit of a mess.
    8 mm ID (5/16") although I only had 6mm (15/64") to hand so dipped the end in a cup of boiling water and stretched the end out to 8 mm with needle nosed pliers. That worked fine for me.
     
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  19. dolj

    dolj Senior Member

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    Nope, leave that well alone.
     
  20. rogerthat

    rogerthat Member

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    Hmm, what if that pump cycles when the radiator is drained?
     
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