Problem with EGR Cooler - New Poster

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by queen_splean, Dec 1, 2021.

  1. queen_splean

    queen_splean New Member

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    Hello,

    First I want to thank you all for all the resources you have put out there. It has made maintaining my 2010 I just bought a couple months ago much more doable.

    However after cleaning my EGR system, I have noticed that I am losing a bit of engine coolant. Looking at the EGR cooler, I can see some coolant dripping off the back where it meets the pipe from the exhaust manifold. I did try using a wire to clear some of the passageways because it was almost completely clogged when I first took it off. I am worried that I am letting coolant into the exhaust gasses, and I do not want any issues with knocking or anything. No previous issues with coolant loss. I have been watching my fluid levels like a hawk since I bought it.

    Or it could just be a loose hose or something, but I won't be too sure until I inspect it more closely tonight or tomorrow. On the chance that I damaged my cooler, are there any members in Colorado that have a line on a decent EGR cooler? I could order one off ebay, but I don't want to ground my car for too long.

    Thanks,
    Cameryn
     
  2. Paul E. Highway

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    There are 4 coolant hoses on that EGR cooler, make sure they are all on tightly.
     
  3. Mendel Leisk

    Mendel Leisk Sand Pounder

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    Did you drain any coolant proactively, before disconnecting the hoses from the cooler, so that the EGR components were dry? If not maybe you spilled some coolant?

    It could be when everything was back together, and coolant topped up, there was some air pockets, and as they work their way out of the system the level drops in reservoir. And the drips you're seeing are just residue. Maybe.

    If it turns out the cooler is leaking: prices for used EGR coolers seem to be climbing, due to demand I'd think. You could check how much a brand new (and clean!) cooler is for you, here:

    Buy Genuine Toyota 2560137010 (25601-37010) Pipe Sub-Assy, Egr W/cooler. Prices, fast shipping, photos, weight - Amayama

    How many miles on it, btw.
     
    #3 Mendel Leisk, Dec 2, 2021
    Last edited: Dec 2, 2021
  4. queen_splean

    queen_splean New Member

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    I think I'm actually okay. I rifled through there yesterday and tightened everything down. After my drive in to town today, my coolant level is stable. The back hose on the side had some coolant crusted around the end; so, I think that was the culprit. I changed the hose clamps to the screw on kind since the ones that you adjust with pliers are harder for me to handle. I probably had the clamp on too loose.

    I also did a little more research on hose clamps, and I guess the screw on clamps that I put on there may not be as good as the plier ones that come stock. I also learned that they make a special type of pliers for those clamps; so, I will order up a pair to try out. Another tool for the collection!

    I did drain most of the coolant out of the reservoir through the drain by the radiator, but I still had a fair amount of coolant spill out when I took the hoses off the EGR cooler. I ran the car in maintenance mode for a few minutes after putting it all back together and added some coolant after.

    Thanks for the link on the cheaper new EGR coolers. All the other new ones I saw were $250 and up, and the used ones were around those prices. I figure when I go back in to clean the EGR system eventually, I just want to replace it with a new one since it was such a pain to clean.

    I have 152K miles on my 2010, bought with 147K.
     
  5. Mendel Leisk

    Mendel Leisk Sand Pounder

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    Screw clamps are inferior to the stock spring style: they’re inflexible (no expansion/contraction), and where the screw mechanism is it puts a point load on whatever the hose is pushed onto; especially hard if that item is plastic.
     
    queen_splean and Paul E. Highway like this.
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