Radiator Cap 1.1 VS 1.8 Explained - Dirt Bike Overheating
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- เผยแพร่เมื่อ 20 ส.ค. 2024
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Use the coolant the manufacturer recommends. Gylcol based is the most common. 50/50 seems to give the best for heat protection, preventing freeze up in the winter, for preventing corrosive buildup within the radiator and/or coolant passages within the engine. In addition, 50/50 mix of glycol and water works best for providing the water pump with proper lubrication.
In a lot of racing organization (such as auto racing and paved track motorcycle racing) glycol based coolant is actually banned. This is because if any gets on the paved racing surface it is very slippery.
Do not forget to change the coolant on a regular basis as the additives within it can get used up. If using straight glycol based coolant, mix with distilled water (do not use tap water as there are usually salt and minerals in tap water). Distilled water is easy to get at a lot of places.
If your vehicle still has a warranty, use what the manufacturer recommends or you could void your warranty.
Never release the pressure cap (whether on the radiator or recovery bottle) when the system is hot. Venting while hot could cause the coolant to explode violently outward and badly burn you. Make sure the radiator hoses are cool to the touch before releasing the cap.
Try engine ice I was overheating my 250F in Glamis which is deep sand but I flushed my system and ran some engine ice and my bike runs ALOT cooler now
There's a few things I'd do first before doing this. 1.service the cooling system with a flush and new liquids. 2.clean and fix the radiator fins. 3. make sure you don't have paint or blockages in the system as internal paints can come loose and clog up the thermometer and smaller passages. 4. check that you don't have an air bubble in the system. Bikes don't just get hot all of a sudden. They are designed with tolerances in mind as to not cook the motor.
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Using a high pressure radiator cap on a cooling system designed for much lower pressures will put the radiator hoses, head gasket and radiator at risk of rupturing under higher internal pressures.
So you have to sheath the standard hoses with other larger hoses so they dont bulge.
If you put a 1.8BAR cap on a bike with old hoses, they will bulge and split.
The rads are designed to handle more than 2 BAR
so when you suspect an issue with the radiator cap just replace it with the oem one?
@@cnote8061 Yes, always use oem.
@@gavin3788 Yhanks man. I have 2017 rmz 450 that's overheating and spilled coolant after being left on idle for 5mins. 1st thing that came in to mind is radiator cap and I was gonna replace mine with a high pressure one. Glad i came across your comment
You’re better off with a good fan kit and a high flow water pump kit.
ya bad idea. if you raise the pressure your raising the temp . they spend a ton of money to designe our bikes to run at a temp for a reason
I went from an OEM 1.1 to a Tusk 1.8 with a built in guage and blew a head gasket. I'm guessing to much pressure in the system.
Ok, new discovery and a rookie mistake. When washing my airbox the plastic cover that's takes place of the air filter was installed wrong. Pushing water down the carburetor and into the engine falsifying a blown head gasket. So it wasn't really the 1.8 radiator cap and the elevated pressure. Lesson learned.
Yeah usually you blow a hose before a head gasket
I have a 2017rmz450 and when it heats up it pours out the overflo.
@@vegasromaniac Hello I have a technical question if you or anyone can answer please that really knows. I Have a WR450 with
a 1.1 bar cap 16psi.. It never overheats and always stays under 180..if I put a 1.8 bar 26psi cap will thar cause undo steess to hoses or gaskets??
I know water boils at 225 with a 1.1 so if it stays nowhere near there any cap over 1.1 should be fine is that right?
Bro I have a KTM EXC 125 2T the cap writes 1.4 and I want to change the cap with one with temperature gauge…should I buy a 1.8 or 1.3 cause I can’t find 1.4 cap…please help
Hey buddy
some great information ,ill have to do some research
LIKED ( thumbs up )
Check oil screen behind magnito . Had to rebuildmy bike 3 times after dealerships sold me a rebuild bike . I tried the ho cap bigger rads evrything on the net nothing helped me the screen was blocked with gasket maker.
Yikes
Thanks Great Video 👍
No problem 👍
I liked the way you did the explanation of the caps, but is there a differance in coolant and antifreeze or is it the same?
Technically antifreeze is one of the chemistry components of coolants like corrosion inhibitors. Really though the terms can be interchanged.
Also the higher pressure the better the heat soak.
As far as thermal conductivity of Evans coolant goes, why dont you test it. Get some Data.
Using a stove, a pot, a laser thermometer and a stop watch. Map the temp rise over time.
Hello, i have a gsxr 600 k8, when i come back home from a "fast" ride when i switch off the bike and the fan worked, i hear a boiling sound and then bleeding the antifreeze/cool liquid from the resorvoir, can a bad radiator cap fault? i changed thermostat and agan draining..
Hey there I just watched your video for the first time I just subscribed to by the way! My son has an 04 Suzuki LTZ 400 and has been riding it with no issues and just the other day I noticed steam coming from the engine so he pulled over and I noticed there was radiator fluid coming from where the radiator cap is! And as I was saying he has been riding this thing I would say for at least a week with no problems beforehand he's very experienced and really puts the machine through its paces. I'm just wondering if maybe the radiator cap decided to take a poop?! I'm not sure of the specs for this particular machine but if you could give me any information on this before I go out and buy another radiator cap and potentially get the wrong one. I would greatly appreciate it. Also I noticed the fluid coming out of the radiator was almost identical to the consistency of brake fluid or power steering fluid! And as you might already know radiator fluid has a distinct smell to it and almost a sweet type of smell anytime radiator fluid leaks oh, for me at least I can tell if radiator fluid just by the smell, in this case oh, there was no smell of radiator fluid and again if I had to bet anything I would bet it was brake fluid or power steering fluid?! If this is the case why the hell would somebody put that into a radiator?! I bought the machine for him about 3 weeks ago check the oil I made sure the machine was tight and the radiator Reservoir was full and it was a darker color like radiator fluid should be but then coming out of the radiator cap is this clear liquid which I just noticed yesterday, sorry for the huge rant
I was riding my 2002 crf450 and we adjusted the idle then the three way hose exploded anyone know why?
So is it better to have a higher pressure or lower pressure my oe cap is 15psi but they used 16psi which pressure will run my system cooler and what is the point of raising the pressure
The water doesn't evaporate at higher pressure so you can gain a couple of degrees
yo so i just bought a new rad, since my old one broke and the seller gave me the rad cap aswell, and actually i thought that the thing that it had a spring mechanism and all that was hella weird, since like my old one didnt even have a place for it yet the rad itself did have it, i used the new cap (with the spring and all that) and used coolant that boils at 200c and ive been riding without cooling issues ever since. also my cap says 0.9 on it, even tho it opens at 160c?
What might cause my coolant to leak out after a minute or so of warming up my KX450F?
the liquid expands, if you dont have a catch reservoir it will leak, the fins iv covered in coolant after you ride it its good , lower than the top of the fins bad
Dodgy cap, try another one. Also check hose clamps. Also I've seen split hoses before with such a minor leak they only show signs when the system pressurizes. (Gets hot)
I feel smarter after watching this
Awesome
I wonder if this would cause pressure to build up and send water out the weep hole though. 🤔
The system is sealed, if you have a leak, you will see it, there is not other way, if it comes out you have a leak
But also need to mention to much pressure can blow back in the engine.
Can maybe blow a hose but not much else can happen
@@vegasromaniac 2018 Honda crf250r actually blew back into the engine, the newer design cannot with stand the pressure of a bigger cap. I agree 100% it used to not happen, think the new twin cam as a flawed design.
Did you have any problems with the1.8 cap?
Evans made my bike run way way cooler like 40 degrees
Evan is well worth the cash for single tracks for sure.
WHERE can you get these SMALL caps? I purchased a total aluminum radiator on ebay for my 1994 Ford ranger, the factory radiator had the NORMAL U.S. size cap, the aluminum from China has the SMALL cap that looks like the one you have, I want to get a 1.1 Bar cap LIKE what looks like yours, WHERE & WHAT do I ask for, already been to 3 parts stores & they cannot help me.
Definitely informative
Awesome
Hi mate, i have a kawasaki kx450f and my coolant is leaking when the engine heats, i have a 1.3 bar radiator cap and i use "motul" coolant . Should i use the "engine ice " ? And also buy a higher presure radiator cap? Something like 1.5 or maybe 1.8? Thanks a lot and excuse my english if there are some mistakes :)
The best thing you can do is to see why it's running so hot, also expansion bowl would solve that problem.. Wr250f has it, yz250fx doesn't but you can install it fro. The wr, slaves all problems
my engine boils a lot and drains the water from the radiator very quickly. how can i solve my problem? crf450r 2010?
Jetting , sounds like to lean
Did you fix your problem?
May I know if the radiator cap having different size beside bar? Thank you in advance!
No, they are always rated in bar.
Bought a 2.0 stock was 1.1, thinking bigger is better but now you got me rethinking??
It still works for me, do it
Can you answer my question please!!!! I have a 1988 suzuki RM250, what kind of coolant should I use???!!!!
Any coolant would work, go to Walmart and for 7 bucks you can buy super tech pre-mixed coolant, works great.. In my bike
@@vegasromaniac I was told the old green stuff but that wasnt specific enough. So any kind hmm okay! Thanks!
@@vegasromaniac I have on hand anti freeze + coolant 50/50 precluded will this work???
@@MountainManKm yes, that's fine supertec works for all cars I even put it in my bike
@@vegasromaniac this called peak, I just dont want to over heat my bike that's all bro thank you.
Are utvs allowed in burro wash trail ? I know it had nothing to to with this Video .
yes, you can park in boulder city right by the cemetery and ride it from there!
Use engine ice
I had a raptor 700, did the change and it blow out the waterpump seal om my first ride.
That was a weak seal than
@@vegasromaniac maybe, but I will stick with the 1.1 cap.
So it is safer to change from 1.8 to 1.1 Than the other way around?
you'll blow your hoses off
I am going back to the 1.1 then, that is true my radiators over heat easier with the 1.8 then the 1.1
That's impossible the 1.8 holds more pressure in that means you overheat only at higher temp so it's better...
&
Lol total numpty 🤣👌