Holy shit. I've replaced the radiator, the thermostat, the water pump, cleaned out my heater core and all I needed was this damn overlooked radcap. Thank you sir

I feel like the cap is the most overlooked overheating culprit

@Billy_bSLAYER

2 ай бұрын

A bad radiator cap caused me some issues today!!

Thankyou! Yours is the first explanation I've come across that actually includes the inlet valve. They all talk about how the pressure is let out, but not about how the fluid gets back in upon cooling. Thanks to you I now know why my radiator is always getting low, a dodgy inlet valve which I never even knew existed!

My radiator cap failed in the way you said you’ve only seen 2 in your career. Went for short drive got home and heard bubbling from under bonnet. My radiator was making boiling sounds while my overflow tank was boiling and spluttering. A large puddle was forming around my feet. Unbelievable that all of this could come from a cap. I thought it did nothing but seal a hole!

@pacsmacks7142

2 жыл бұрын

Sounds like mine too!! This guy probably doesn’t work on a lot of cars lol I think maybe it’s more common than what he made it seem! Any time I shut the car off my over flow tank sprayed stuff out and kept the over flow jug full.

@mikeeverett1282

2 жыл бұрын

Same here! I couldn’t figure out what it was and was starting to think it was a head gasket failure. So thankful for videos like this

@workliferecognition7002

2 жыл бұрын

What i thought too just had radiator replace. The cap seems to fit bit differently and its still overheating. Fluid bubbling out of the overflow. Now I wonder if its the cap.

@cybersfn7678

2 жыл бұрын

@@workliferecognition7002 did you ever figure it out ?

@workliferecognition7002

2 жыл бұрын

@@cybersfn7678 yea a hose but anything related was all bad anyway now a possible exhaust leak

All radiator pressure caps should be bench tested prior to fitting. We never installed a new cap without pressure testing it first. If you don't have access to a system pressure tester, measure the cap and radiator neck carefully to ensure that the two rubber seals are slightly greater in distance than the two radiator neck seal faces. The pressure seal must be positive. .5mm minimum.

@donaldperkins3191

2 ай бұрын

Question my ford Econoline 150 1992 is leaking the hoses is dry radiator is dry the radiator cap leaking alittle bit antifreeze is full what to do

@Dave-qp8rq

2 ай бұрын

@donaldperkins3191 Could be a leaking water pump. Ford are renowned for leaking at the water pump. You need to fill the system cold, run up the engine on idle until hot and periodically squeeze the hoses to see if they get harder. If they stay soft - the system is leaking and you should be able to see the wet area beneath the vehicle. If the hoses go hard as a rock - the system is pressurized and most likely overflowing the expansion tank/bottle.

Good quick overview, though I had to rewind a few times to understand what 'weakest link file' was..:P J/K, hence I'm from CA and had no suspicious of my cooling system, but I removed the radiator cap and see no spring or washer! I knew that wasn't correct but I am perplexed how long it's been like that or how it happened. One guy said he hoped the part isn't in my radiator or elsewhere - I think the hole is too small on my Toyota, but I'm going to check again as I just bought a replacement - I'm glad you mentioned how long they last, as I'm beyond that, so it's time. Thumbs up!

Inlet valve (the small one) failure recently happened to me. Collapsed radiator hose due to the coolant contracting as it cools.

Thank for the tips. Its very useful. Great video Thank you

The rubber was definitely expended passed the metal so I replaced the cap and went for a nice drive w no problem. Just wondering if the 25 degree difference in air temps from yesterday when it overheated could make that big of a difference.

Thanks for the help

Thx for this!

My cap needs to be change while looking online, it was asking the psi of the cap or whatever. And normally it would say on the cap 13 or 16! But the cap didn’t have anything on it. Is there another way to look for it?

Thanks a lot.i carefully trimmed the extra rubber from around the middle flange and now im all set.saved me a lot

My car is 2019 Jetta 1.4 , in -14 it’s not produce enough heat to warm inside the car and gauge still remain at zero but when I start driving gauge and heat both going up , any idea which one one work

will this cause excessive pressure in the upper rad hose?

There's a spring that popped off my Radiator cap when i opened it. Should i have it replaced.

Question: I replaced my radiator cap same size 1.1 However, when the engine cools down even after a day or two, the coolant does not return from reservoir tank back to radiator. And there is still pressure left when you open the cap even after having it rest for a day or two. What do you think the issue is? Been spending a lot of time figuring this out. Thanks!

Hello. I have a problem I'm trying to get help with. I have a 2008 Chevy HHR LT and it has been overheating to the point where the Guage on the dash goes clear to the max as far as itbcan go and if you continue to drive (I live a long way from town) the Guage will drop real fast, like immediately to the lowest point on the Guage. And stay there. I have looked and looked for a replacement cap for this radiator Cant seem to find one😅 anywhere. Meanwhile, my plastic radiator cap has gotten so hot that it has fused to my radiator threads. How do I get this plastic cap off? And more importantly, where can I find the correct cap for this 2008 Chevy HHR? I cant find one anywhere. Even the chevy dealer only has the plastic cheap caps. I don't want to go through this again. I am at my wits end trying to find a replacement cap. Please please pretty please help me. I can't afford to take this to a dealer for this.

Their is a problem i need to slove to ask from u. Normally after angine heats, coolent comes to outer tank but after cooldown the engine it will never return bank coolent from outer tank to radiator. After cooling the angine i open the radiator cap it susk some air from lid. Can u please help me to slove this ?? Thank u

Hi Possibly you can help this Aussie -The other day I drove my car for more than a week, when stop at shopping centre RED Temperature light appeared on my Dashboard I checked the Reservoir completely empty also the radiator took about a litre & half of water. I did not drive again until yesterday and Red light appeared Radiator took over 2 litres of water. Got the Road Side Assistant out he said he does not think its the head casket as the car starts with no problem, he could not see any leaks under neath the motor / on the ground. How do I put the Coolant in the Radiator, if there is still some water inside and do I have to mix the coolant. I have a 4 litre of Distilled water. Please help no $$$ I'm a 74 year old Pensioner. John

Thank u Very Much

My 2012 Suzuki Grand Vitara’s radiator cap failed. I used one from a Toyota. Worked now it doesn’t. Can’t we use just any radiator cap? Has to match the vehicle specifications?

Thank alot

Thanks

Can I ask a question any one can answer pls I have dodge Charger 2012 v6 I have problems my coolant overflowing on the pipe with out overheating. Any solution pls help me.

can we shift 1.1 bar to 1.3.bar?? i hv kia picanto which is 1.1 bar radiator cap head..

Also you can press the intake hose by hand if the cup is bad it show the water passing the expand tank if is no water that mean this valve is good.

Water is boiling on my ford focus but car engine heat is normal, and there was a big puddle of water could it be the cap on my car

Hi I replaced my radiator with an all aluminium radiator which came with a 19psi cap; but the max psi for the cooling system on my 2001 Dodge Ram v8 van is 18psi. The 18psi pressure cap can't fit the new radiator because the opening is deeper and the 19psi cap is bigger. Would it do any harm to use the 19psi cap that came with the radiator or would it cause any problems with other parts of the cooling system like the pump-seals or hoses?

@MrRGM10

3 ай бұрын

I dont it would make damage just expect different coolant temps behavior

Greetings from Orange County, California. thanks for the tip on checking to see if the rubber plug is out of shape and hanging over the metal. Not sure how much over it has to be but on my 20-year-old Toyota it is a little bit all the way around so I'll be replacing that radiator cap, since I've been having some minor overheating issues and I can't figure out anything else that is wrong 👍

@jayislander

Жыл бұрын

Did it fix it

@michaelrs8010

Жыл бұрын

@@jayislander No, but for cheap I now have a new radiator cap and I know that's NOT it. 😁

@jayislander

Жыл бұрын

@@michaelrs8010 how do you know lol

@michaelrs8010

Жыл бұрын

@@jayislander well, unless the radiator cap was the problem and I replaced a faulty radiator cap with a brand-new, yet faulty, radiator cap, I just have to take it on faith 😁

@jayislander

Жыл бұрын

@@michaelrs8010 mine didn’t work either think it’s my head gasket

Radiator caps do make a difference. On my 97 Trans am, it went faulty, it was overheating up to like 300 degrees, water bubbling and exploding from the resorviour, and even it was popping. Changed it, temps dropped to normal, cooling was great.

Thanks for video,my sons 2001 toyota camry overheats ,hoses have alot of pressure very hard like rock,and overflow tank empty..Could this be radiator cap?

@methree3821

Жыл бұрын

More like back pressure from a blown head gasket.

Where is the radiator cap located on a 2003 ford tarus

Yup my trailblazer cap was broken inside but i did not know how important this cap is...

Hi my car radiator reserve tank always has pressure even after it sits for a view days,but there is no sign of water inside the motoroil or loss of coolant.what could be the problem?

@big_W

4 ай бұрын

Did you find out what the problem was? I'm currently having the same issue

Sir my car toyota corolla 1.6L 4cyl 2008 orignal radiator cap was 88kpa and i replaced it with now 108kpa .....is this right ?.... I replaced due to 88kpa cap was broken do i replaced with toyota brand new 108kpa....is this ok bcz 108kpa is little bit high value than 88kpa ?

@yahngtoonzentertainment4470

2 жыл бұрын

It's been about a year. Did the 108kpa radiator cap cause you any problems?

Gonna be honest, I do welding and hvac but I don’t know much about cars haha. I have a 2014 Dodge Dart and I keep having to refill the coolant and I’m getting nervous because I don’t want the engine to overheat or have the coolant keep leaking out etc but I’ve never seen it actually leak or drip out under the car after driving or while idling etc. Is it possible that I have a broken radiator cap? Thanks for the help. I like to learn things on my own and I appreciate the advice 💪

@Abel_Girma91

7 ай бұрын

Replace the cap and see if it helps, they are cheap

I've never heard the term "header tank". Is that the plastic reservoir?

@foihdzas

3 жыл бұрын

Yes

Wow, mine doesn't even have a metal flange inside the radiator cap. It has the seal but the metal flange is gone.

When a man starts a video with Gday, you know hes an ok bloke.

tnx, best to show a damaged one next to normal one.

If the radiator cap is cool while the upper and lower hoses are hot . Is that also an indication the cap isn’t working?

I had the vacuum value disappear into the radiator (Suzuki Swift)- coolant was sucking in and overflowing in the reservoir after a hot run; temp gauge went to H! Tridon do a replacement cap, but it looks cheap ($17) and nasty. It also has a plastic vacuum value, which doesn't scream _reliability._ I would recommend you buy a genuine part ($75 for a swift).

@gcscr

3 жыл бұрын

Had the same problem with my 2011 Grand Vitara, the vacuum valve of the cap, went into the radiator. Coolant was disappearing after driving the car. The temp gauge didn’t went high. Did you resolve the problem just by changing the cap? Any other issues with it?

@modvs1

3 жыл бұрын

@@gcscr I think the cap was a cheap after market one, if so, the valve would have been plastic/rubber. Apparently it shouldn't matter if it disappears into the radiator. Just get a new one and top up the coolant. We drive the Swift daily up a steep mountain (650mtrs elev) on hot days (30 deg C+) and it's cool as kitten!

@Rois300

9 ай бұрын

Plastic/rubber end on the cap doesn't deteriorate and mix in with fluid in the radiator??

I'm trying to figure out what's wrong with my cooling system at the moment. I squeezed the large hose that connects to the radiator cap and it hisses. Is it suppose to or is it supposed to be an air tight seal?

@alanandrade2083

Жыл бұрын

Try spraying AT-205 Reseal to seal and rejuvenate the rubber in the hoses. Should it still give you issues make sure that the clamps are tight. Then, last case-scenario you have to replace the hose.

My one is plastic and is leaking when car drives at higher revs

@Dave-qp8rq

2 жыл бұрын

Sounds like a small failure between engine compression pressure and cooling system (head gasket, water jacket crack etc)

I have a problem. After refilling the radiator, I drive for 30km. The coolant bottle gets filled to max and the radiator looses water sometimes the car temp gauge goes to max. Yet I got a new radiator and a new cap. But this should not be happening.

@jayislander

Жыл бұрын

Did u fix it

👍🏼👍🏼👍🏼

I believe my radiator cap leaked out all my coolant 😭

can remove sticker on radiator cap sir?

@paulh9301

3 жыл бұрын

I seen oem caps with no stickers on it

Nasty radiator cap

Mate, i could tell a story to my question.. But first things first.. "Why is the tubes, radiator cap look like someones been making cappuccino in my engine bay..?" Did my mech fail me when he replaced a new radiator..? He is getting old, like my 2004 Honda.. I can't say what i think may be true, cos I'm only 30% know how mech, but the line is dirty or mix of coolants.. ..and that he's too old..😅

What is about 1.1 on the cap

@Dave-qp8rq

2 жыл бұрын

1.1 bar or 15 psi opening pressure. This is typical for most engine cooling systems.

@bachirdjebali

2 жыл бұрын

Thank you

My landcruiser if I squeeze the radiator hose it holds no pressure at all, bleeds straight out the cap to overflow, that can’t be right eh?!?! Plus it boils and steams into the overflow reservoir, my mechanic who charged me 100s on other parts of cooling system repairs, now has reverted to “no-speaker the English” No other available cap fits .. what to do? ..sigh..

@Dave-qp8rq

2 жыл бұрын

There will be a pressure cap available that fits. Sounds like your cap is not seating down hard enough. Bend the tabs down a little with pliers and try that.

@saeedmuhammad2178

2 жыл бұрын

If we forget the cup so what can we do

@Dave-qp8rq

2 жыл бұрын

@@saeedmuhammad2178 On large cooling systems we don't use caps, we use pressure relief valves, back bleeders and vent valves.