Kia Optima/Hyundai Sonata Thermostat Replacement How To

[@That_Gary_Life]

Extremely well done tutorial. Verbally and visually very informative. Thank you!

[@jazziehuell816]

in case anyone is wondering, the KIA dealership has the right thermostat, but there’s 2 different sizes depending on the exact model, make sure you prove the last 8 digits of the VIN, i got mine today, they were in stock and came out to 36 and some change, not bad vs what AutoZone wanted to sell me, which was a whole kit including the housing for 264 plus taxes, just an fyi

[@stanislav9608]

could you provide the part number

[@cubanpilot8450]

Thank you sir just saved me 300$ 🤝

[@SimplyTrav]

I believe the thermostat is on the lower hose for the 2017…I’m searching for it now..and there’s no video for the 2017

[@patrickwhelan5703]

Great video and well said. My wife's 2016 Kia Optima LX 2.4L check engine revealed code P0128. So, O'Reilly's says $50 but only the 180 degree version they stock. I haven't taken the broken one out yet. I'll see what KIA sells in the parts dept for our VIN #.

[@Rodriguezrod4]

Did you find out?

[@patrickwhelan5703]

@@Rodriguezrod4 So I bought a Coolant Thermostat from KIA today. It was $30 and according to the parts guy, it's the only one they have for this vehicle. It's 82 Celsius which is 179.6 Fahrenheit.

[@stanislav9608]

@@patrickwhelan5703 Coold you provide the Thermostat Part No. Is it #25500-23010, and what kind of the gasket did you use. I appreciate your help.

[@kodab928]

After changing mine I have a leak only when car is parked and off any ideas what it might be ?

[@BLUECOLLARGARAGE]

Sounds like your thermostat gasket is leaking and not sealing all the way. When the vehicle cools or sits overnight that gasket shrinks causing a leak.

[@luisangelarroyo30]

Awesome tutorial, did you had to bleed the line and if so where's the bleeder located?thanks

[@BLUECOLLARGARAGE]

No bleeder valve just have to squeeze upper hose and let the bubbles work themselves out just be sure to check your level the next few mornings.

[@luisangelarroyo30]

Great thanks again for the info.hope lot other youtubers will do vedios well detailed, hope to see more videos like that.🙏

[@kylem4622]

Good video. I have 2011 optima hybrid, I've keep squeeling on my new belt tensioner. They last about 3 months now w out noise. U have any problems with urs? I never had issues until 3yrs ago btw

[@BLUECOLLARGARAGE]

No issues haven’t had to change it yet. What brand of tensioner are you using?

[@kylem4622]

@BLUECOLLARGARAGE Denson what is recommended by KIA. I took it into Midas and they said they r hard on Tensioners due to the battery n gas changing constantly. It maybe my stretch belt then idk just trying to see if I can get this knocked off my annoying list.

[@efrenruiz5379]

So no oring on the thermostat itself? Only on the housing???

[@BLUECOLLARGARAGE]

Correct

[@vagramvardanyan9407]

Is it really necessary to drain all the coolant out of the radiator I itself not gonna all empty and pour out from the hose that you disconnect from the thermostat

[@BLUECOLLARGARAGE]

Not totally necessary you can just pull the hose but it will make a mess. Or you can drain out about a 1/4 of coolant and that should be enough to drop the coolant level just under the thermostat.

[@tyleralvarado509]

Is this the same on a 2012 Kia optima ex and if so how much coolant do you use?

[@Andre-rc7lp]

Is the 2017 Hybrid similar?

[@BLUECOLLARGARAGE]

It might be a little different due to a 2017 being a 2.0 motor but should be very similar.

[@FreshKicks4545]

Did you start the car with the radiator open after refill it?

[@BLUECOLLARGARAGE]

Yes and let it run for a few minutes then put the cap back on so it can build pressure. Take it for a spin or let it get up to normal operating temp and make sure the thermostat opened up. Shut it off let it cool preferably overnight and recheck your level and add any if need be.

[@kryptikarts3922]

I just had the engine replaced under warranty suddenly the second day driving the car, it gave me the thermostat code p0128 i believe

[@kryptikarts3922]

You think they might have done something wrong or it’s genuinely bad @74k miles

[@BLUECOLLARGARAGE]

@@kryptikarts3922 what is temp guage reading on the dash? Are you getting any heat out of the vents when you have your heater on? Could be a bad thermostat. If your not getting any heat the thermostat could be stuck open thus not letting the engine warm up to normal operating temp throwing your sensor off which will throw that code. Could also be they didn't bleed all the air out of the cooling system when they replaced the engine. Does it say anything about the thermostat in your paperwork?

[@kryptikarts3922]

@@BLUECOLLARGARAGE Temperature reads normal, no heat in vents or any visible leaks or signs of overheating. Its the only code and happens the second time i drive the car after the engine replacement, i currently have my honda in the air for brakes, and my explorer needs suspension work so i didn’t wanna deal with all that though it seems simple, it might be stuck open so i just took it back to their shop for not warranty covered but “complimentary” repair lol

[@BLUECOLLARGARAGE]

@@kryptikarts3922 yeah thats what it sounds like thermostat stuck open or sticking. Let me know what the outcome is curious to know.

[@kryptikarts3922]

@@BLUECOLLARGARAGE got it replaced, it just stuck open, but its all good now, not sure how i feel about the whole car in general though an engine blowing rod bearings at 74k is a little worrying.

[@danielvaldezaguirre]

NIce Video, one question though, I have a Santa Fe that uses the same GK4E engine, did change both gasket and thermostar with oem parts, bled the system and all, but now it takes a while to reach operating temp, how long does it take your kia up to operating temp? I have my doubts about that gasket and proper seal, i think coolant is flowing freely and it takes about 5 miles to get to operating temp

[@BLUECOLLARGARAGE]

Sounds like you may still have air in the system or like you said the gasket didn’t seal all the way so coolant is getting past the thermostat before it opens up this taking it longer to heat up and open the thermostat.

[@danielvaldezaguirre]

@@BLUECOLLARGARAGE I realised there is an indentation in the housing that matches a small arrow in the stat, so I will need to crack it open again and position it as it should so it will seal better!

[@JoshuaEXE18]

5 mins is long as hell

[@danielvaldezaguirre]

@@JoshuaEXE18 has it installed cattywompus and was not sealing correctly now it gets to op temp super quick, thanks

[@stanislav9608]

@@danielvaldezaguirre I have exactly the same issue - after replacing the Thermostat with OEM part #25500-23010 and Mahle C32422 gasket. I was thinking that the gasket is not sitting properly, and coolant is leaking from the engine to the radiator before the thermostat get opened. I thought even that Thermostat is faulty, but after reading your comment, I am 99% sure that misplaced gasket is the one that causing this issue. I knew about that special indentation in the housing that matches a small arrow but could not find it on my Santa FE Sport 2.4L, 2014. What year is your Santa FE made? Did you make gasket wet to better stick to the housing. Also, the gasket interface from top and bottom looks a bit different. Will it matter which way you placed it on the housing? I am going to drain the coolant again and try to keep the gasket in right position. Did you have normal heat inside the vehicle? I have the heat only when the temperature is set to its maximum. I will appreciate your help.

[@bigboybuilder77]

How similar is this process for 2016 kia optima?

[@JoshuaEXE18]

It would be the same process. I have a 2011 I am planning on doing and advanced auto has the 50/50 Peak Original Equipment Asia Green Antifreeze and Coolant: 50/50 Ready To Use, 1 Gallon for 19 dollars so def getting that

[@kalani1987]

What was the reason for the thermostat change?

[@BLUECOLLARGARAGE]

Just some general maintenance since this car had high milage

[@JC-us7ye]

Is it a must to drain the coolant ?

[@BLUECOLLARGARAGE]

No you just need to drain enough to make it beliw the thermostat. Or you can just pull the thermostat but it will most likely make a huge mess

[@ixryq8368]

Where is the coolant temp sensor located?

[@imcahnor7844]

i just replaced this recently depending on your cars year it should be located somewhere behind your spark plug wires

[@CrashCarson14]

Does not sound fun lol idk

[@charlesloar3210]

Nubby Things are locating Pins.

[@boyka9115]

Hi bro, I have the same problem and it made me crazy and I turned the whole housing out and I bought the thermostart with the housing and I also faced the same problem is the leak. What is the old seal is damaged and the new one is the same that you threw ! I don't know what I do 😠💔😂

[@BLUECOLLARGARAGE]

So your saying the new seal is leaking?

[@boyka9115]

@@BLUECOLLARGARAGE Yes, because of it there is a leak which comes from the Agent is not the same as the one you put the old one , like the new one

[@BLUECOLLARGARAGE]

@@boyka9115 are you able to use the old gasket like I did in the video?

[@boyka9115]

I can't use the old gasket because it's damaged due to the engine's overheating

[@lulu6226]

@@boyka9115 were you able to figure this out. I am experiencing the same problem?