Prius Ct200h Losing coolant exhaust heat recovery exchanger

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DO NOT TRY THIS IF YOU HAVE LITTLE MECHANICAL EXPERIENCE
YOU MAY DAMAGE ENGINE
this is the complete how to DIY exhaust heat recovery bypass
WATCH EVERY STEP (no skipping)
another MORE DETAILED video is on its way
for questions or advice 209-305-1672

[@calidragonveganicfarm7967]

Thank you for your video. I’ve been having this problem for a year. I’ve been having to check my coolant every week to prevent overheating and recently I forgot to do it and my car overheated today in the rain. Fortunately I found your video and felt confident to drive home because the coolant was not leaking after refilling 3 times on the way home. I immediately follow your instructions and disconnect the coolant to the catalytic converter. For those that is wondering, you have to take apart the windshield wiper, the mechanic driver for the wiper, and the large panel above the engine in order to access the coolant hose connectors. Took me about 1 hour. Then it took me 1.5 hours to let the engine run and drive around the freeway to burn up the residual coolant at the heat exchange. There were lots of white smoke coming out. For fortunately it’s gone now. My heat works fine. So far so good now. Your video saved me lots of headaches and money. Can’t thank you enough for sharing this. 🙏🙏🙏

[@jhanghirhussain1317]

Hi does this effect the engine in the long run I would appreciate you reply thanks

[@Rj-22]

Pls reply I have issues 2020 Prius prime , and dealer ship asking 4000 dollars for change whole exhaust system , is their any issue if I do bypass , I think Toyota should recall all Prius prime after 2018 as all have same issue bcz prime has this kind of coolant exhaust system

[@calidragonveganicfarm7967]

My car has been running well without any issues since I disconnected the coolant to the exhaust. It is worth the 2-3 hours of work and never have to deal with overheating and white smoke aiming out of tail pipe. What they did was stupid, there are too many vibrations at the exhaust and can easily cause coolant leaks.

[@Rj-22]

@@calidragonveganicfarm7967 thanks for reply

[@calidragonveganicfarm7967]

By the way, as mentioned in the video, disconnecting the coolant from exhaust has no adverse effect to the engine. Only draw back is that your engine will take a few minutes longer to heat up. Waiting a few minutes to for the heater to work is way better than having to deal with coolant leaks and expensive repairs. For some reason, I think my mileage has improved since I disconnected the coolant from the exhaust pipe.

[@silasf94]

Thanks Again brother! I did a bad diagnostic of it in a 2017 prius I thought it was the head gasket and it was this issue. Thank God the person had someone who know about this issue.

[@silasf94]

@@ozonepower4034 I am a single mobile mechanic shop brother unfortunately

[@ihernandez91]

Wait wait wait so just doing that simple bypass, I won’t have that issue anymore?!? These guys from the body body shop located at the dealer are over here telling me that supposedly it might have been the water pump, but then after paying $900!!! It’s still doing the same thing! If that’s all I need to do to fix this, you are gonna be my new idol my friend!! 😮

[@hirohunanyan]

Thank you so much, mine just started and I’m hearing slushing and stuff and I researched figured out 4th gen has this issue and your video helped so much

[@grahamrichards9855]

To add a bit of context here. This, in my experience, doing this bypass is what I found for directions to get to the hoses. This is my model so your milage may vary. First I had to remove the wipers, which was a small cap at he base and a 10mm nut. No puller was needed Second I removed brake fluid cover, Then the two pieces of cowl on each side. They are held on with 2 clips each on each side had to use a flat head to pop them off. For the main cowl its two push through clips on the front one on each side. Then peel off from the windows. I had to used a flat head near the glass and hand under the cowl to pop the cowl from the rubber gasket at the lower part of the windshield Third remove the wiper motor. Its two 10mm bolts on each side then unplug and remove Forth the lower cowl. there are 10 10mm bolts two on each side 3 on the right back side one on the back left side and 2 holding the wiper motor braket. Then 4 14 mm bolts that are suspension mounting bolt. Only two of the 3 on each side need to removed. At this point to should be able to remove the lower cowl/cross member. You should now have access to the hoses in the video.

[@thx1138guy]

Wow! How many vehicles with this system have you seen so far having this problem? Would you recommend owners bypass this feature before failure occurs? Most car owners don't check fluid levels frequently enough.

[@mattgeans3758]

I also have a 2017 Prius Prime that was smoking so bad it looked like a coal rolling diesel only in white smoke. I knew the EGR cooler had coolant exchange, but until I started researching youtube videos to learn there was another coolant exchanger in the exhaust. What will they think of next. I ended up heading to Lowes, buying 3/8 galvanized NPT pipe, 3", 6" and a 3/8 nipple and created a U bypass and pulled the hoses off the heat exchanger under the car. I added hose clamps in addition to the factory clamps to make sure they stay on and it indeed fixed the issue. It took me about a 50 hour drive to burn off all the coolant out of the exhaust system. Next day I noticed that driving in my town that the car was noticeably not putting out the heat by a certain gas station that it normally would. I may perform this bypass to reduce the amount of fluid in those lines the engine has to heat up to temp.

[@gasketmasters]

Awesome.

[@espereactions2]

Thank you for posting this video! You saved me a lot of money and time. This work perfectly. Lots of stuff to remove first to get to the hoses, but it was pretty easy to do.

[@VinayakGovande]

What all do you need to remove? Is there a video or information about it anywhere? Thank you

[@nickhahn5412]

Saving lots of people money with this video! Thanks man. Will this turn off the code?

[@DIYBIGMAN]

I’m gonna have to do this on my 2017 Prius prime. I’m starting to lose coolant.

[@seyon71]

I have a gen 3 Prius and I've been having cooling issues and I think this just solved the problem. In fact I'm 99% sure it did! Please promote this to gen 3 as well as newer generation Prius owners!!! My coolant wasn't leaking but has been overheating. I changed the engine and was still having the same problem even though I replaced the coolant pump, the thermostat and had it flushed. Flushed. I think this is a design flaw of monumental proportions. My question is is it going to throw any kind of code? I don't think it should and it should not have any adverse effect on the engine, in fact, it should make it awesome! Thank you!

[@skorpyo331]

For 3rd gen too? My leak I believe is on the little line goin to catalytic.

[@rubensuarez20]

Thank you sir I tried this out hopefully it works. If not, then it’s the head gasket. I ended up sucking out the leftover coolant from both open hoses with a shop vac, then electrical taped them to keep them clean just in case I go back that route if it’s the head gasket lol.

[@tomvan3994]

Well, how is the bypass working on your Prius??

[@rubensuarez20]

@@tomvan3994 everything is still good. All worked out. I drive 90 miles a day and still not problems.

[@aibakhafeez5287]

Great video! Does the check engine light turn on by doing this?

[@shaka7866]

It doesnt

[@Kanotoa]

What about 3rd gen

[@shaka7866]

Thank you I am indebted to u. I just used your instructions and applied to my prius it worked like a charm.

[@user-wg3bu5wh6d]

How did it hold up?

[@GLC-1979]

Title is misleading, you're showing a Gen 4 engine and Prius. CT200H had a Gen 3 engine which did not typically have the same heat exchange issues or very randomly.

[@HPTBANDIT]

I’ve been wondering if I had a bad head gasket but this seems more likely. I’ve been adding coolant every oil change and I’ve been smelling a hint of coolant in the exhaust.

[@KLB22]

How do I do this on a 3rd gen?

[@seanbouker]

I saw your short video the other day using some kind of dorman thing underneath the vehicle do you have a link to that one... My head gasket blew about 5,000 miles back and I rebuilt it in my driveway watching these videos... Did my first oil change today no coolant in the oil but I did notice there was a crapload what looked like an arterial bleed around the cat lool... I remember watching that short and was like oh my God... Well I guess we know why my head gasket blew now... And wife still been losing coolant despite the fact that everything inside with my engine Bay looks completely fine 🤣

[@jstew4js]

Hi @gasketmasters u don't have to plug those two open limes with anything?just leave them open?

[@rubensuarez20]

I suck the left over coolant out with a shop vac and wrapped them with electrical tape lol.

[@genemetz1945]

Gasket Masters - Muffler Tech - Please comment: My 2014 Prius with 233,000 miles is experiencing coolant leak. My car still runs good. No engine shake. I usually drive fast 75-85 mostly Texas intrastate, The check engine light randomly comes on and then goes off after a while. Code P0117 The Temp warning light comes on randomly after driving a while then goes off when I slow down. I don't see any smoke or liquid coming from the tailpipe or leaking anywhere. I do have to add coolant (about a quarter reservoir) about once a week. Yesterday I had to refill the entire reservoir with coolant after a 2-hour drive driving 80-85, Then next day drove the same 2 hours at 65 and did not lose any coolant. Took my Prius to Toyota to check it out. They said they could find no leak but, I need to replace my engine and the water pump. They did not tell me why? To me, it appears to be a leak of coolant into the catalytic converter.

[@seanbouker]

Long story short I don't really feel like taking apart my windshield wiper assembly... The vehicles already up... can I just bypass it by the cat?

[@anthonyleyva]

I know this comment is from a year ago, and you likely already have this issue solved, but for others who made need to context, I'll answer it: From what I understand, there is a way you can bypass it down by the cat. It's a little more intensive since you actually have to by a few parts and cut the hose, but it is entirely possible.

[@erbalumkan369]

Sinds there is a leak inside the cat converter, would there not escape exhaust gases from the CC into the hoses? Might want to plug up those openings?

[@1129otorres]

Is this something you see on prius v? My issue is steam coming out of the tail pipe. Its wet yes. I did headgasket (blue felpro) car running great. I just dont know if i should worry about the steam.

[@1987FX16]

What about the exhaust flap being permanently closed with the bypass? You have to pin the flap back or it'll never open.

[@DJNexuz1]

Hi, my Mechanic did a bypass because of the same reason of the coolant coming thru exhaust. Can this bypass let heat come thru vents even in the lowest temp? I dial the temp to LO and still get very hot air.. i have to turn down the speed to not feel so hot

[@dimdim3490]

did you solve this problem? Please let me know, i might have the same problem. I live in a cold climate and need the heat but if there is too much heat it is not good either :) So please let me know if you figure this problem out. Thanks.

[@hrrh]

... sooo that is what a bong sounds like : ) thanks for the prius help to bratha

[@liolizcano3335]

Was the Catalytic overheating? Mine is overheating and leaking coolant.

[@pgreenx]

Do you know if there is a TSB or any recall on this. Mine broke at 4 yrs and 80k. Also can I assume the Cat converter is still good if this has been a problem for only a few days? Thanks so much for posting

[@Mister_H]

Yes there is a TSB for it

[@pgreenx]

@@Mister_H thanks. Just found it and had mine fixed for free at dealer. Covered under federal emissions warrantee 96 months or 80k. I had 79,500!

[@Mister_H]

@@pgreenx that’s great news and just within the mileage limit 👍

[@pgreenx]

@@Mister_H FYI… I walked in with the TSB thanks to this channel video and told him what was wrong. I wonder what would’ve happened if I played dumb

[@dimdim3490]

I just discovered that i might have this problem on my 2019 prius prime and of course this part is excluded from Canadian 8yrs-130 kilometer emission warranty on prius primes (at least this is what the dealership told me).

[@bpsmith0587]

Forgive my ignorance on how this system works, but could the hose going to the heat exchanger be clamped, or does it need to complete the loop/cycle through?

[@onemangangomg241]

Great video. Looks like you have to remove alot of stuff up top to get your hands near those hoses? Did you also take off the windshield wiper mounts? So far, I've taken off the plastic cowling. Now it looks like I need to take off the thin metal cross-member that the wipers mount on to.. Thoughts? Do you have an expanded video somewhere? Thank you.

[@MrBlazingit420]

Yes you have to remove the cowl, windshield wiper motor and the bottom cowl to get to it. All 10mm and 14mm bolts, I’m doing it rn I’m actually just stuck on trying to remove the clamps and hoses, pain in the ass because of the angle of my clamps I can’t get to it

[@jstew4js]

I just did exact thing on my 4th gen and the hose u left open on the bottom coolant started spewing coming out of it..please help

[@Patrick-nc6kk]

yeah when you do this operation you lose some it's normal just top it off if it falls below minimum at your toyota dealership

[@jstew4js]

@Patrick-nc6kk update it only lasted for a couple Oz and now stopped.this hack worked for my car and I'm very empathetic to the video creator

[@rubensuarez20]

You should have sucked out both open hoses with a shop vac and then electrical tape them to keep them closed. What was coming out was just leftovers.

[@jstew4js]

@@rubensuarez20 your right and anyone in the future who reads this will benefit from your comment

[@dimdim3490]

@@jstew4js could you please tell, if your cabin heater stopped working? or it works as before only takes longer to start pushing hot air? thanks.

[@akkoeln7839]

what happens to the flap that is opened there in the exhaust when the cooling water is warm? no water in it flap always closed ? maybe the catalytic converter breaks down if the flap is permanently closed or Particulate filter may be clogged?

[@u.e.u.e.]

Great! 😃👍Better than a $/€/£ 1,900.- job! What had happen if you didn't turn the knee with the temperature sensor? Hadn't the temperature sensor pointed to the left and the wiring had been long enough? 🤪😃

[@Rj-22]

I have 2020 Prius prime and same problem Toyota dealership asking 3000 dollars , if I do by pass is their any problem to car , pls reply 🙏🏻

[@dariusz435]

Does this problem also occur in the 2022 Prius 4 facelift model?

[@riceburner4747]

THANK U!! I dont KNOW what we prii owners would do with out u! 👍✊🖖🇺🇸

[@farhatabbas283]

Thanks, you very nicely explained the hole issue.

[@ozonepower4034]

Can I get car mechanic jobs?

[@imjustabilly6660]

This a permanent fix with any possible issues?

[@汤志珩]

Can I use this to my 2010 model prius?

[@ryanfitz5515]

I did on my 2010. Had to refill coolant in the cat exchange to avoid smoking and exhaust coming into the cabin. As well I had to connect those hoses so there were connected.

[@dreze000]

​@@ryanfitz5515Did you reconnect back to original, or did you cap the ports on the cat so the exhaust wouldn't come out?

[@davidgriffin14]

If I have a technical question about my hybrid Camry, will y'all answer it over the phone?

[@MidasTach]

Hello did this on mine but for some reason the car lags a bit but has no coolant in the oil hence don't think the gasket is blown. There is still a bit of throshing in the muffler. Could this be the problem??

[@AMF_TRAVELERS]

Super sir ❤nice video very helpful ❤

[@alexsalfetnikov5127]

would this work for prius 2014 year ? Thanks

[@TonyStew619]

Will this affect smog inspections in California?

[@michalpatela8600]

Is it not gonna demage the engine driving with this not on?

[@emplp]

Does this work on Gen3 or do i need to bypass at the cat side?

[@higherregion]

i have a ct200h misfiring on all 4 cylindrs and white smoke..head gaskset?

[@igor_30cm]

thanks . You saved ma money))

[@Mbold2066]

Thank You!!!!!!!!!!

[@GurvinderPalSinghDhillon]

Hi i just did bypass but heater stop working no heating at all even after driving 80km please give me any solution

[@dimdim3490]

Do you have heating? I just discovered that i might have this problem on my 2019 prius prime. I am thinking doing bypass but under the car, next to catalytic converter (it seems easier to do). please let me know your outcome. Thanks.

[@omarmahmood00]

Just to confirm after doing this bypass the heater works and heats up just like before or there is less heat now?

[@josepacheco1700]

Think it takes a little longer to heat up Is all

[@GurvinderPalSinghDhillon]

My car 2017 heating stop working at all after bypassing

[@dimdim3490]

did you do this bypass? Do you have heating? I just discovered that i might have this problem on my 2019 prius prime. I am thinking doing bypass but under the car, next to catalytic converter (it seems easier to do). please le me know your outcome. Thanks.

[@valentinomc]

Is that a common problem with Prius? It just happened to me with my Prius 2019 as well

[@mikewu8516]

how did you solve it？ me top

[@valentinomc]

It needs to be replaced with a new one. @@mikewu8516

[@jstew4js]

Yes I have a 2016 did u fix yours?

[@dimdim3490]

Do you solve the problem? I just discovered that i might have this problem on my 2019 prius prime. I am thinking doing this bypass but under the car, next to the catalytic converter (it seems easier to do it this way). please let me know your outcome. Thanks.

[@justinchew1074]

I’m thinking about doing this but I have a question. Any chance that diverting this coolant from the cat could cause the cat to run too hot?

[@gasketmasters]

The cat does it require coolant to stay cool. It’s designed to get hot enough to burn carbon internally

[@carlosvallejo3699]

@@gasketmasters I just did this bypass. Would this fix ruin the cat?

[@ryanfitz5515]

Mine smoked and stunk up my cabin until I filled it with coolant and loped the hoses together in my 2010

[@matthewfoxx9115]

Just tried this on my 2018 with 265,000 miles. Coolant reservoir seems to be dipping down more rapidly except now I have puddles under the car instead of it simply disappearing. No coolant in oil and don't think the hg is blown. Any ideas ? Thanks.

[@WilddogAB]

its the same problem, it is on the prius 2016 as well. It is an issue with priuses.

[@luis720lm]

Sounds like you created a coolant leak, did you figure it out?

[@peanbean1973]

Imagine you replace the head gasket and then find your converter is stollen😅

[@justinchew1074]

Does this problem apply to 2012 ct200. Losing coolant and heat only working on driver side

[@davidvuchetich3045]

Did u get an answer?

[@justinchew1074]

@@davidvuchetich3045 no, not sure if this same issue applies to a 2012 ct200h? If so, does the same repair apply ?

[@davidvuchetich3045]

I’m going to say yes simply because the GEN three Prius also has that heat exchanger down by the catalytic converter and yours does as well. What troubles me is your discussion about having heat on one side and not the other I’m not sure how that applies, but that could possibly be a heater core blockage possibly?

[@streetnoah]

I am having the exact same problem as Justin. Low heat on drivers side only. Dealer wants to replace entire cat $3200. A local repair shop says just replace heat exchange for 1500 but cant get the part in.

[@justinchew1074]

@@streetnoah oh man , either way that’s expensive. I hope there’s something more simple going on .

[@a1load741]

Thank you save me lots of $$$

[@liolizcano3335]

My car is a 2014 prius