The original housing was redesigned. I agree that the original was a bad design. You kind of shot yourself in the foot with the bolts. The new thermostat housing calls for a shorter bolt length. Re using the originals is what gave you the headache. KTM hose clamps are about as good as you'll find on any motorcycle though they are a bit on the thin side. They have rounded edges to prevent the clamp from cutting into the hose which is something cheap clamps don't have. ABA/Scandvik hose clamps are of the same design as OEM but wider and thicker and completely stainless steel. I use them and they work great. Glad you got it sorted!
@TJGoober Жыл бұрын
Jeremy, good video, thanks! FWIW, I had leaks on two coolant hose ends on 2019 790R. The one behind the radiator, on top of the headers, is impossible to see without removing the radiator and it appeared to have leaked since new. I tightened, replaced one clamp on the water pump end and even added a second hose clamp there with no success. No issues w/ the T Stat housing though. If you are going to this much trouble (removing the radiator) chasing leaks get a set of the Samco Silicon hoses and their heavy duty hose clamps. Absolutely worth the money and solved my leaks and a robust upgrade. Note the torque spec on their hose clamps, it is a lot tighter than I would have ever tightened them. Cheers!
@Docv4002 жыл бұрын
Threads are cut with a Tap, so running one down again won't damage them in any way (use a 'Plug' [Bottoming] Tap). You're more likely to damage them with a DIY-grooved Bolt, as there will likely be Burrs along the Groove(s).
@nortnad1386 ай бұрын
Finally, a video which explains it all! Good job. Thinking of laser cutting an aluminium spacer, instead of making a gasket? Or should it be malleable?
@hojresor3 жыл бұрын
Good video. I just found out that my KTM 790 Adventure R leaks on the thermostat-house, just like yours did. I bought my KTM new in the spring of 2019 and the first week or so I had to tighten the hose clamp on the thermostat-house, because it leaked. It stayed dry until last week when I have driven it 30,000 km.
@TheOliveradams7 ай бұрын
I recently also discovered a few drops of coolant under my 890 duke R (10.000Km) , I just fastened the clamps a bit more and the problem was solved 😃
@zoeylamant82983 жыл бұрын
pls keep us updated. ive done the samco hose upgrade just to realize the leak is coming from the thermo housing just like you. these design flaws seem like rookie stuff for such an experienced manufacturer. hard to get help with it on the ground as well. smh, real frustrating .
@dominiqueroumieh9260 Жыл бұрын
Hello. Thank you for this great video. Hope that you can help me. I have a 2021 890 adventure r and it's leaking coolant very slowly, by night and from the same place as yours did. I saw your video and I am afraid to dive into my bike like you did. Are you a mechanic ? How much time it took you to remove all these parts and to put it back? Is it hard? Can't be done without removing the fuel tank? And last, the solution is to replace the water connector or to add a ring inside to tighten the connection ?? Thank you in advance for your reply.
@jlmainusa Жыл бұрын
Hey Dominique. Thanks for your message. It’s not difficult to repair but it does involve removing the tank and draining the coolant. If you plan on riding off road, you will probably want to learn how to access and fix your bike in case you have a problem on a trail. Having said that, I would recommend you ask a friend (who is comfortable mending machines) to help you fix this issue. Good luck 👍
@dominiqueroumieh9260 Жыл бұрын
Thank you again. I completely agree about repairing your bike. In fact, I only ride off-road. However, I am studying my options. Maybe, I will leave it for winter and I take my time on it
@checkitout34743 ай бұрын
Hi! Thank you for sharing your experience. I have a 2023 ktm 890R. After one year of ownership and 5600 miles on it, I noticed that the coolant level I slightly under the min (I checked it with the bike on the side stand). I have not noticed any leaks on the floor. During summer where I live we get to 100-105F. I have two questions: I) is it possible to lose some coolant as a result of riding in high temperatures? Ii) the coolant that have now is clear (it is the OEM), however, the manual recommend the Motorex M3.0. Do you think I can top it off with Motorex, and therefore mix it with the original one? Thank you!
@jlmainusa3 ай бұрын
Hi. Interesting question. Coolant is cheap so I replace every year. As such i haven’t seen the levels drop. I run my bikes on Evans coolant which doesn’t corrode the inside of the engine and it can cope with high temperatures as well. Hope this helps.
@checkitout34743 ай бұрын
@@jlmainusa Thank you for the feedback! Is the process to replace coolant complicated? My concern is about trapped air bubbles. It would be amazing if you could do a video for us on how to do that!
@Howling-Mad-Murdock3 жыл бұрын
Hmm, interesting. Good vid, looking forward to seeing if you get a response from KTM. I’m guessing something is amiss, because if that’s the part they are using now, then surely they’d all be impersonating a steam room from new.
@ydocsaee4212 жыл бұрын
Hello. Just watched your video, and just want to say, great info! I have a 2021 890 S and I'm having a small coolant leak upon cool down overnight. Apparently it's still an issue. Any specific way to confirm if it's the housing with the thermostat or just a hose, without pulling it all apart? What's the best way to get one of those custom gaskets if needed? Thanks for your info.
@jlmainusa2 жыл бұрын
Hi Cody. My housing has been watertight since I made that gasket. KTM have released several upgraded manifold housings and I would have thought the 890 would be problem free by now. I made my gasket by buying sheets of gasket material and cutting my own with an x-acto knife. I wouldn’t use gasket cement from a tube Hope this helps.
@janeelp2 жыл бұрын
I am having a similar issue with my KTM 890 Duke R. I was doing some research and came across your video. With regards to the bolt issue, I noticed in the video that the older housing had thicker shims built into the housing. Very similar to the washers you installed. Did you check to see if those were removable and could be swapped over to the new housing?
@greatfallskam2 жыл бұрын
Hi Jeremy, Looks like you have one of the few definite videos on how to permanently fix the KTM 790 / 890 Adventure / R coolant leak. Can you tell me of those OETIKER clamps you're using open up to go around hose without having to remove hose? Do you have a detail video or resource on how to take radiator off? Oh. What was actual diameter of hose going to the thermostat housing? You mentioned you thought some of the OETIKER clamps might big too big. Thanks. Kam
@jlmainusa2 жыл бұрын
Hi Kam. All good questions but truthfully I cannot remember all those dimensions. I've included a link to a manual that I think will help you: www.dropbox.com/s/iyxf3k3jugs7kit/KTM%20790%20EN%20Repair%20Manual.pdf?dl=0
@craigwac5567 Жыл бұрын
Hello Jeremy from KY. You video is perfect. My clamps were loose too. I would like to get the clamps you used. What brand part number are they? Where did you purchase them. I like the idea of the spring for constant tension through the heat cycle.
@jlmainusa Жыл бұрын
Hi Craig. They are on Amazon: Oetiker 17800175 Stainless Steel Self-Tensioning Steples Hose Clamp, Bolted, 9 mm Band Width, 30 mm - 36 mm Hose OD Range (Pack of 10)
@andreglomm98438 ай бұрын
Nice
@andreglomm98438 ай бұрын
My 2019 R I Just buy used in November leaks also I Hope the Sales Dealership will repair it. But have u a Update? Still no more leaks?
@alexballery37532 жыл бұрын
Hello, thank for the video. I think i have the same issue... Was your bike smoking sometimes in the morning when you start it ? Was it leaking on the manifolds ? Thank
@jlmainusa2 жыл бұрын
You will probably smell a sweet odor. That’s the coolant as it burns off on the exhaust. You’ve probably got a small coolant leak. I would stress. Keep an eye on your coolant level and top up, or replace flange per my video. My bike is as tight as a duck’s ass - and that’s watertight 🤣
@nesmrtelnateta3 жыл бұрын
interesting...well it seems it all worked out in the end, i dont know if it is all companies or just ktm that bikes have so many baby problems or what is it called in english i have 2020 model so i hope im all sorted out, i had one mist or cloud of coolant leaking but never showed again so i didnt bother to investigate
@sadeqalbana9 ай бұрын
sir you saved me a lot of time, I have found everything I need in a single video, much appreciated. what about the oil leaks from the cylinder head, you seem to have this problem too, have you just gave up on fixing it because it keeps on returning?
@jlmainusa9 ай бұрын
Hello. Glad you found this helpful. I haven’t had oil leaks though (on this bike at least). My KTM 350 has a small leak when it’s ridden hard. But the amount of oil lost is so small I don’t worry about it.
@davidazzano5520 Жыл бұрын
I own a 21 KTM Adventure R and brought it in for its first service to a KTM dealer. After words my bike was leaking? They overfilled my oil and said they could not find the leak. I brought my bike home and started to investigate the leak. I found a coolant line with a loose clamp. Tightened the clamp no more leak. You would think the KTM Dealer mechanic could have found it? Not plus know not to overfill the oil. Very disappointed in the KTM service.
@Northmanbimmer Жыл бұрын
Hello, I live in the north of France and I'm glad I saw your video to fix my fucking leak! Thank you very much for sharing your experience with lots of details and part references. ✌🏼
@josepinofpv3233 Жыл бұрын
Hello Jeremy, your video is awesome, any chances you remember the dimensiones of the ring sealing element yo put in the thermostat?
@josepinofpv3233 Жыл бұрын
And do you have any update fo the leak? was it an final solution?
@jlmainusa Жыл бұрын
Hi Jose. Thanks. After fitting the seal, I have not had to touch cooling system. No leaks 👍. I can’t recall the exact dimensions but it’s easy to measure when you remove the thermostat cover. I used gasket material that was about 1mm thick. It was “donut” shaped and around 3mm in width between outer and inner circumference. Hope that helps
@josepinofpv3233 Жыл бұрын
@@jlmainusa you are the best my friend, thank you!!!
@TheDavidGoldmanphoto Жыл бұрын
Well, this was VERY helpful!! I'm curious if you have now modified and put on the 63535019200 part? I have a 2019 "S" version and it's been leaking. All the clamps have been tightened but still happening. Seems likely this is the culprit.
@jlmainusa Жыл бұрын
Hi David. Sorry to hear about your leak. I only did exactly what I showed in the video. New coolant connector (with home made fiber gasket). Washers under the connector's bolts, and the new clamps. She's been water tight for since then. Not a drop lost 🙂
@TheDavidGoldmanphoto Жыл бұрын
@@jlmainusa I looked into the new piece and turns out it's back ordered till Dec (at least in Nova Scotia, Canada) I'll be coming to the UK next month. Maybe I'll swing by your house ha ha :) Thanks again. If you are at the ABR maybe I'll see ya. I'll be presenting photos from my series. The Motorcycle Portraits.
@jlmainusa Жыл бұрын
@@TheDavidGoldmanphoto Hey David. I would experiment making that gasket and use the existing connector (with washers). I suspect that will be a big help. I'm in Las Vegas now. Both a basic and ADV rider instructor. Great to grab a beer if you are in town. Cheers
@TheDavidGoldmanphoto Жыл бұрын
@@jlmainusa A, Vegas. I passed through there two summers ago when it was 118 degrees on my way to LA. I'll keep it in mind. Thanks again.
@graysonchurch2623 жыл бұрын
Great vid! Love it when people find well thought out simple fixes. The thousand dollar question... what do you think of the 790 and if given the choice, would you buy it again? I’m about to buy either the 790 or a t700 ( with full suspension upgrade ) so both bikes will be of equal value, so hopefully I’ll be comparing like for like. Just wondering on your honest thoughts from a mechanical perspective on the 790r and the ease of which you can maintain it yourself? I’ve previously owned a heavily modified 990r which I really liked as I found it relatively easy to take apart with very basic tools. Would love to know your thoughts?
@jlmainusa3 жыл бұрын
Hi Grayson. 790 is a fabulous bike. But it’s been replaced by the 890 which I’m sure is equally as good. I would definitely recommend the “R” model. The electronics and adjustable suspension are fabulous. I haven’t ridden the Yamaha, and it sounds great value for the money. But I’m sticking with KTM because I ride offroad as often as I can.
@maariog.38012 жыл бұрын
ktm changed the water connection part number 63535019100 =>63535019200. Maybe you don't need to add a thermostat pad anymore
@andreglomm98438 ай бұрын
Thanks for the Info
@adamstallard5523 Жыл бұрын
Hi Jeremy, having the exact same issue as we speak. Do you remember what material you used to make the gasket out of to put under the thermostat? Thanks
@jlmainusa Жыл бұрын
Hi Adam. I went to a general autostore. They sell sheets of gasket materials in various materials. I forget what I used but it felt like a rubbery felt. It was around 1mm thick. Hope this helps.
@jshingler52843 жыл бұрын
Good video. Couple thoughts. Is the new replacement part thinner at the bolt flange? If so could have just shortened the bolt a couple threads. I am wondering with the new part you should have gotten a thicker O ring. That may have been superceded too. Either way you got it fixed. 👍
@jlmainusa3 жыл бұрын
Both flanges are the same thickness. I decided not to cut the bolts as I'm never sure if they are plated or solid stainless. I've pinged KTM and asked for comment.
@alfonsomarquez44452 жыл бұрын
Hi Jeremy I have the same problem, but instead of adding a gasket I’m going to mill de plastic part, I’m going to remove .015” (.40mm) . Question, how thick was the gasket that you install ? And the leaking stoped?
@jlmainusa2 жыл бұрын
Hi Alfonso. I've had the gasket in now for 18 months and it still works great. I think I used 1mm (1/32") sheet of rubber/cork gasket material. Cheap at most vehicle supply stores.
@alfonsomarquez44452 жыл бұрын
@@jlmainusa 😉👍thank you !!!! Great video !!!!
@garysramblings85843 жыл бұрын
Hi Jeremy, I've been looking for a lighter off road bike and this KTM has been on the shortlist so I watched with some interest as you might imagine. I'll be interested to hear what KTM have to say, as I know from previous examples where item have been changed, that it often isn't just one item that is effected. The lower profile of the thermostat housing cover might also need a different thermostat and shorter bolts as part of the change. It takes a good switched on parts guy to make sure that you are aware of the big picture. As a case in point two friends had their compensators fail. One dealership gave one price the other the dealership the price was three times the amount. The first was just going to supply the compensator, while the second knew that the new up graded compensator needed a new alternator to go with it, due to the increased size of the new item. So it really could just be the stores person didn't know their product.
@jlmainusa3 жыл бұрын
Hi Gary. The 790 R is a fantastic bike. I rode 9,000 solo around the TransAmerica Trail last year and this bike was phenomenal - comfortable, handed beautifully - perfect. I dropped it several times and I knew I would be able to pick it up and recover without issue (including the time I rode through a stream and wheels sunk up to the axles!). This coolant leak was trivial and I could have lived with it. I'll post KTM's reply.
@garysramblings85843 жыл бұрын
Hi Jeremy. Thank you for getting back to me. I'll definitely be having another look at the bike when the weather improves and the lock down eases. Space is an issue at the moment too, but I'm getting that sorted soon. I could always sell one of my other bikes, But my new Rocket 3 GT is a keeper as is the BMW GS which I do take off road, but that can prove to be a real workout if you have to lift it out of the mud more than twice. I'll look forward to hearing the update, and thanks again, ride safe.
@jakedickinson2 жыл бұрын
Working on a KTM is like building a kit car.
@Marillionado4 күн бұрын
Great indepth video. Thank you very much indeed.
@tylervosters323411 күн бұрын
What lights do you have mounted to your forks and how did you mount them
@jlmainusa8 күн бұрын
They are Denali DM LEDs. I have on all my bikes. Very small but very bright. I mounted them on the two arms that KTM uses to support the headlight. This allows lights to stay pointed straight ahead even with the front wheel turning
@zipsfranquemont71042 жыл бұрын
Any updates? Incorrect part? Comment from KTM?
@zerocochrane1713 Жыл бұрын
Hello, technical question. What sealant (some loctiete?) did you use with thermostat housing? What sealant did you use ?
@jlmainusa Жыл бұрын
Hello. I didn’t use sealant. I bought a pack of gasket material sheets from local auto store. I made a circular gasket to fit housing. No need for sealant. No leaks after several years 👍
@zerocochrane1713 Жыл бұрын
@@jlmainusa thanks for the reply, regards !
@gregheth6 ай бұрын
Thank you. You saved me hours
@ericdawson3425 Жыл бұрын
I bet you don’t hear from then maybe you should have got a new thermostat with a newer rubber gasket at the same time you got the new housing
@gregheth3 жыл бұрын
Thank you
@ben333river3 жыл бұрын
Nice work!
@torevenheim9607 Жыл бұрын
Use plastic parts in cooling system is not a good thing, it will rot and warp with age
@aleksandartasic76523 жыл бұрын
There is no way that is a correct replacement part. No way engineers will be that far off. I suggest you check your part numbers for compatibility.
@MichaelM-to4sg3 жыл бұрын
Completely agreed. It’s possible too that the new spigot requires a new thermostat which has a perimeter shoulder and/or thicker o-ring. If this were in fact a straight part replacement from factory, this issue would have been identified immediately. This is clearly dealer parts dept that is clueless. Your video should be titled “My dealer parts dept sucks” not anything applicable to an engineering problem at KTM.
@TheFastphill3 жыл бұрын
@@MichaelM-to4sg my Guess is KTM make a 890 and pretend the 790 never existed
@edwardflavin23986 ай бұрын
Where did you purchase the hose clips ? Thanks
@jlmainusa6 ай бұрын
Search Amazon for "Oetiker Stainless Steel Self-Tensioning Hose Clamps"
@mahuro00110 ай бұрын
What diameter does the thermostat have to make the gasket?
@wardiup9392 жыл бұрын
Such a great video! So thorough 👌👌
@yvesdegheselle Жыл бұрын
Thanks for this excellent Video
@RollinwithRoland3 жыл бұрын
Great video, I'll definitely be keeping an eye on my 2019 790S now. Just bought a month ago and at 2200 miles. The only issues I've had so far were the result of some shitbag technician assembling my bike with not a torque wrench in sight. Had a mirror come loose at 80mph, had my shift linkage come loose at the top were it connects to trans... then, one of my hand guards popped loose at 75mph...
@jlmainusa3 жыл бұрын
I heard the same and went over my bike with torque wrench. Had the same shift linkage issue. Once you've done that, I suspect she'll be perfect.
@RollinwithRoland3 жыл бұрын
@@jlmainusa I brought it back to the dealership I bought it from after having the first service done 3 weeks ago, I made the service manager very aware of the issues. Brought it in specifically for checking torque on EVERY nut and bolt... Rode it 130 miles across the state, and they bring it back out "done." I gear up, go to put it in gear and the shifter sticks down... Upshift, sticks up...moron over-torqued linkage assembly.😠🤬🤬
@arthurleithold22903 жыл бұрын
What are the gasket dimensions for the one you made if I may ask? And out of what material?
@jlmainusa3 жыл бұрын
Hi Arthur. I bought a general pack of automotive gasket materials off Amazon. Packs are cheap and have five or so squares of different materials and thicknesses. I don't recall the exact thickness, but it was a rubber-fiber -like material. I think it was either 1/32 or 1/16th" thick (the thinnest option). BTW: My bike has run flawlessly since fitting it. No issues whatsoever.
@tonygreen82213 жыл бұрын
With all due respect Jeremy, I don’t think you should be making engineering judgements given that you didn’t immediately identify that the original part was a different moulding to the replacement . The bolts being “too short” should have also rung alarm bells that something wasn’t right. There’s always a chance of human error in the parts supply chain and as home mechanics, we need to be on the lookout for those things. Agree that original clamps aren’t brilliant, but if not over tightened, they’re good enough and those clamps that you’re putting on are a more complex design and frankly I don’t see the need for a hose clamp to expand with heat or contain a spring. Will be interesting to see how they hold up. Lastly, I think that adding that large spacer next to the thermostat is only asking for trouble. I think you’ll find that with all the correct parts, things will go together nicely. Thanks for making the video. Interesting bike.
@jlmainusa3 жыл бұрын
Hi Tony. It is a head scratcher. I have asked KTM for comment and to clarify if and where I made a mistake. My experience with KTM is that they use the same part number in as many bikes as possible. Makes sense because designing, manufacturing and storing etc is expensive. So why would they make more than one flange that are almost identical. I doubt they would. And in any case, both flanges were the same depth, so bolts bottomed out on both. Anyway. I'll post KTM's reply. Good thing is my persistent coolant leak has stopped. Excellent!
@jimh206117 күн бұрын
Did this solve the coolant leaks on this bike. I'm thinking about doing this too.
@jlmainusa8 күн бұрын
Yes it did. No leaks since then.
@mahuro00110 ай бұрын
And what type of material do you use to make the gasket?
@jlmainusa7 ай бұрын
Just pop down to an auto parts store and they sell packets of gasket material. Usually has a few different materials in each packet which allows you to choose the right one for the job.
@mahuro0017 ай бұрын
@@jlmainusa Thank you very much, look and see if I can find it
@maariog.38012 жыл бұрын
how tightly to tighten the screws of the thermostat housing
@jlmainusa2 жыл бұрын
Hi Maario. The manual says 6NM
@queenslander9542 ай бұрын
After seeing all the cheese camshafts videos , I’m thinking coolant is the least of your problems.