How to bypass your heater core

visit www.bearsleak.com or call 859-428-7342
When using any head gasket sealer, it is important to bypass your heater core. This video shows 2 different ways to do it. If you need to order the parts that are shown in this video, you can use the links provided below.
Dayco 87617 Heater Hose - amzn.to/2xauCIb
Hose Connector Coupling (you need 2) - amzn.to/2wGtVEQ
Hose Clamps (10-pack) - amzn.to/2xaJNRD
If you want to simply pinch off the heater core hoses you will need 2 pair of vise grips. here is a link to purchase if you don't already have them
Vise Grips (you need 2) - amzn.to/2wGQppB
How to bypass your heater core for head gasket sealer bars leaks blue devil bears true blue head gasket sealer

[@c431inf]

Got stuck at work , I used a socket and 2 clamps been holding for few years now I'll get around to it lol

[@alexnano4146]

😂😂😂 fucking ayeeee

[@eeyyaakk6801]

c431inf 11b what would have happened if you didn't do that? Overheating? How?

[@ryanravencaller]

@@eeyyaakk6801 cars use the engine coolant flowing through the heater core to heat the car, if the heater core leaks, it usually leaks into the floor of the car, leaking heater core = no coolant. No coolant = no pressure to cool the engine and radiator system

[@debrastrickler6941]

@@ryanravencaller would this cause the engine to get hot and reduced engine power if the heater core claims released some how?? Or could be chance have a hose that came off of my coolant reservoir?? Thanks Debra

[@zachjs2721]

@@debrastrickler6941 No it would be fine, the only thing is you wouldn’t have heat or defrosters in the winter time, which is what happened to mine, I have to bypass it when I have time!

[@Sdon111]

Heater core was leaking like a sieve 900 miles from home. Stopped at big rig maintenance shop they said the job was too big for them (RV not their gig). Saw this video and and hour later I’m on the road. Drove from Laramie WY to St. Paul Mn with a 3 hour sleep break and held up perfect! Now I can choose where and when it gets repaired.

[@bearsleak735]

That's great! Glad it helped!

[@eeyyaakk6801]

Scott Donahoe the heater core leaking would cause your engine to overheat because the coolant would be depleted thru the heater core leak? is that what you're saying?

[@deadsypadilla]

@@bearsleak735 awesome

[@chegvra]

Sometimes- depending on the length and flexibility of your hoses, you can just plug the inlet into the outlet hose: I used a metal splicer to join the hoses, and put and put two little metal ring clamps to tighten the hoses into the splicer. Worked great.

[@josepharchuleta3129]

Thank you so much! I didn't know what to do because my heater core was leaking onto my floor board and I saw how daunting of a task it is to change out the heater core, or at least after work living so far from a parts store and running out of daylight and time as I have to be at work so early in the morning. Then, I watched this video and said to myself I can go to the store and buy the hose,clamps and fittings described in the video. I then came across YOUR comment, ran to my garage and found a plumbing fitting some extra hose clamps and problem solved in 20 minutes thanks to YOU!

[@terryharmon4115]

Tryna make it through the winter definitely want to know if I'll still have heat when I do the bypass

[@duecedondon2953]

@@terryharmon4115 If you do a bypass you won’t have heat at all, I’ve done a bypass and my defrost works but it takes a while , going to reverse the bypass so i can make it thru the winter lol

[@mostafaakram3519]

Does this enhance the performance of the ac system? Because the heater core and the evaporator are in the same location.

[@homecookingbeginner7512]

if i permanently terminate both inlet and outlet like your 2nd suggestions will there be any problems in the future? e.g. will the water pressure be too high and might damage my radiator etc...

[@jacobwagner1431]

Thank you this really helps a lot

[@travissnyder8277]

Should I fill my heater core if I do this because my blender doors is stuck on heat? I have already done this and have ice cold AC again. However, heater core is clean and perfectly fine just capped off and not using it. Should I fill it will coolant and cap it off

[@mps397]

You don't need to buy any hoses for this just take the houses off put a coupling in one then connect the other clamp down and your done. It's just that simple

[@bearsleak735]

Very true. If your hoses reach one another of course without any kinking

[@c431inf]

Yep

[@AaronNickols88]

I'm asking a genuine question, I bought the coupling can I just attach with the clamps

[@jonesdarnell2486]

But will your heat still work?

[@cannymarie2124]

@@jonesdarnell2486 no. This is disconnecting the small metal box that radiates/generates heat.

[@deanharris2240]

I'm deleting the rear hvac unit in my suburban and going to use Dayco (U-shaped) hose and clamps underneath in the rear. Should work, right?

[@MRCALIEMS]

My 02 Honda CR-V started leaking coolant on passenger floor inside . Hopefully this works was quoted 60$ to get it done .. not sure where the hoses are on my k series tho so might just pay 🤦🏽‍♂️

[@keytaarkeytaar4665]

Isn’t option two putting stress on the water pump and potentially damage the water pump?

[@trevinocorina2623]

Any quick fix for an hvac heater pipe mine wont come in till a week an i dont have the old part ether any ideas on how to block the hvac heTer pipe on a 05 chevy malibue

[@TheJj1977]

Im assuming you have to empty the system prior to doing all of this?

[@husambakhsh38]

Will option 2 affects the coolant temperature? Is the coolant circulation include the heater core or it is a external system? Can somebody help me

[@sandrudaniel19]

Is it ok for engine if i just blocked the coolant flow from the engine to the heater valve with a piece of thin rubber strap ? So the hot water is blocked from going through valve and heating the car like crazy. Now is so chill in since the flow is blocked. Is ok if doesnt recirculate with a hose and is just blocked ?

[@maxxmich]

also block or plug the heater core ports as well

[@vinojcosta7491]

Bears leak. What about the 2 valves which is in the fire wall. Isn't it necessary to close them? If we keep it just opened is that ok?

[@devenstone7449]

Yes

[@ahmadvlog448]

For VW Caddy 2012 in Dubai?

[@chegvra]

Do we need to get the coolant out of the heater core once we’ve bypassed? Any harm in it just sitting in there?

[@davecrupel2817]

Yes. It will flow out as soon as your hose disconnects. And slosh it's way out as you go over bumps. Find a way to close off your heater core inlet and outlet.

[@dominicsherman5376]

Do I need to replace my heater core before going on a road trip?

[@johnminshell6532]

If you clamp off heater hoses how will you heat screen in the cold weather

[@miaurye1286]

Undo it. This is a seasonal kind of thing

[@t106-hakim3]

Can i bypass heater core on civic fd 2011

[@joebhed1]

Maybe its just me but just watched this and Option 1 is primo. Option two provides no continuous circulation of the coolant. The fix is not to protect the heater core. It's to protect the cooling system of the engine - by isolating a heater core problem - and that requires a healthy dose of coolant circulation. Am I missing something ?

[@evilbastard6587]

Affirmative. This little fix here is actually meant solely to protect the heater core. It will isolate the core from the cooling system when a stop leak chemical is applied to try to fix a failing head gasket. That chemical will react to the presence of heat and exhaust or air to form a solid to try to plug up a coolant leak. But there's the possibility it could also react in the heater core to plug that up, too.

[@YeahRight825]

I have a 1999 Mercury Sable that I need to do this on. Would this same procedure work for it too? It's either do this or spend $700 - $800 to get the heater core replaced up under the dash (5 to 6 hour job, estimated by two different mechanics).

[@bearsleak735]

YeahRight825 you can certainly bypass if if you don't need heat in your car. Of course you want to use the coupling method.

[@JC-rs9ln]

This will improve the ac getting colder?

[@drueatcer]

I don’t think it has anything to do with the AC.

[@gregmccarter5386]

I put gate valves on..incase the heater core ever gos bad..i can shut it off..

[@gradydunkin7439]

Good idea

[@acura1384ify]

I was thinking ab it ..🤣🤣 here in nc.. is very hot every sumer season.. and octover to march.. is coold so is good idea to open it ... thanks...

[@RevMac777]

What about a 2005 Cadillac Deville 4.6 engine. Where is the bypass hose located? I just ordered Bears True Blue and looking forward to seal the deal in my North Star engine.

[@bearsleak735]

check this video out. i think this will help you. specifically look at 15 seconds into the video and 44 seconds into the video for the best view of what you are looking for. hope this helps... kzbin.info/www/bejne/Znynl5aOhdGqq9U

[@zeramin3585]

hey friend i used this stuff and it works , get some and try it

[@RevMac777]

Thanks zeramin 3 I just used it on my 2005 Cadillac Deville. Its early since I started running my engine but so far so good. What type of car did you use this product on?

[@zeramin3585]

on a 1999 nissan maxima , the car was about ready to go to the junkyard , i searched bars leaks and found a video called the bars leaks scam , it ruined the guys land rover so he started making his own product , ive got a little over 1300 miles on mine so far , ive put no extra water or antifreeze in mine yet , what about you . ? hey im thinking if i get another 700 miles out of my max im thinking of buying junk cars with blown head gaskets and flip them lol

[@RevMac777]

Congrats on fixing your 1999 Nissan max! 1,300 miles and no coolant loss sounds sweet. I had the same idea of fixing up junk cars with blown head gaskets. There are thousands of Cadillacs with the North Star engine that have faulty head gaskets. You can pick up some nice cars cheap and turn a profit. I was thinking of using Bears True Blue on my 2003 Buick Park Ave, Ultra as a preventive maintenance. Run them till they won't run anymore. lol

[@GJJC13]

Why can't you just block the hose that takes the coolant the heater core? Does it have to recirculate anyways?

[@chepewicho7284]

Good question, I'm in the same spot

[@tamirrawarren5309]

Does anybody know if when you bypass the heating core will you have ac still? We have to by pass ours cause we dont have the funds to pay for labor on our heater core

[@fishfire_2999]

Yes

[@SHA3BOL1]

Actually it will boost your ac efficiency by stopping the heat from going inside car cabin.

[@Wayneboy1982]

It will be better

[@Charlitos1988]

@@SHA3BOL1 sure?

[@debrastrickler6941]

How long can this bypass remain on your truck before something else goes wrong??

[@CH-gc1fd]

All it does is keep water from going to your heater core. Mine is leaking into my passenger floor and it’s about a thousand dollar fix. The only thing by passing it... (correctly)... does is keep you from getting heat.... so fix it before winter.

[@debrastrickler6941]

@@CH-gc1fd Thanks for the info. I’m in AZ so our winters are beautiful. I’m from the Midwest so cold doesn’t bother me too much at all. 😊

[@kyefang8278]

Hi OP. In you alternative solution, if we clamp off the inlet and outlet hoses, will we block the whole cooling system circulation?

[@guido1534]

Kye Fang yes. Don't do that.

[@edgarpoe6966]

Of course it would! Don't do that!

[@Charlitos1988]

that's obvious but well. I think he made a joke.

[@da324]

@@edgarpoe6966 No it doesn't.

[@edgarpoe6966]

@@da324 yes it would. What happens when the heater core is blocked? You get no heat out of your vents during the winter. Summer time you lose water because the engine heat evaporates it into steam which comes out of your overflow, you can't see it until it gets so low and your engine is really hot and your gauge is shoots up in the red and your sitting in the side of the road calling a tow truck. due to no circulation of the water because you clamped it off or the heater core is blocked up. connect the hoses with a double sided nipple or whatever it's called so it can continue to flow

[@jordanross4615]

Advice? Lancer 1994 is overheating says guage but the radiator not boiling or feeling hot, but steam coming in to car via vents and floor on both sides is wet with coolant... Mechanic says it's probably heatcore for the air conditioning, quoted 1500$to fix can someone give me simple advice /images so I can do it myself, I don't care if I can't use the cooling /heating in car I just need it to drive, thanks 💜🙏

[@da324]

What part of the video didn't you grasp?

[@samechanic3341]

Im wondering what's the point of bypassing the heater core? I know its a dumb question but i dont understand why someone would bypass it if its leaking why no replace the heater core?

[@xbeastlygingerx2096]

Because a lot of people don't have a $1000 laying around to pay someone to fix it, plus no one wants to do it themselves because the entire dash and steering column all gotta come out. Its just a lot of work to fix a little part

[@jasons1559]

Will it go though the winter time without heater core?

[@tannerkey2128]

Yeah just no heater or defrost

[@ddggttyy]

what happens in the winter when you don't have a heater core? I want to do this as a last resort but Michigan winters are pretty nasty. what can I expect to happen? Thank you..

[@armyoutcast846]

Your vehicle loses the ability to heat up the passenger cabin. (In other words you will just not be able to recieve heat from your vents!)

[@ddggttyy]

+MudStreak Legend thank you! In that case I'm really hoping this heater core lasts the winter.

[@armyoutcast846]

@@ddggttyy welcome

[@Accumulator1]

By looping a connection you will have full circulation even when starting up your car on a cold morning. It will take longer for the engine to warm up because a substantial portion of cold antifreeze is bypassing the thermostat and going into the block. If it is just a temporary thing then just couple the two hoses together like with ribbed metal coupling from Tractor Supply. If permanent then I would cut off the hoses to a short length and install a metal plug into each.

[@raghedd2296]

I don't have hot air insaide my car jeep grand Cherokee 2005 They said the problem is the heater core need to be replaced so if i pass it the hot air will work again????

[@fishfire_2999]

@@raghedd2296 No

[@mr_mickals5657]

@@raghedd2296 lol. I'm sorry... It's the hot coolant passing through the heater core that allows the air to be heated up. If you bypass then you get no coolant through heater core

[@gabbymaymon]

@@mr_mickals5657 yes you right You do that becuse it's very expansive to replace Heather core you need to dispart all of the dashboard to reach for the heater core

[@keytaarkeytaar4665]

Accumulator1 I was thinking about permanently plugging both hoses, but also was wondering if plugging both hoses shut put stress on the water pump and potentially damage the water pump. Any thoughts?

[@manrajsingh430]

sir i have hyundai verna car its heater core is bypass thn i connect pipe to heater core and chnge the water moter pump of car but now my car is totally coolent is lose when car is runing 100 km whts the probleam sir plz explan

[@forgottenknowledge8917]

Plug it at the engine. You'll have spare plugs laying around.

[@dolobyte]

Hey, that option 2 is not really a good recommendation. Clamped hoses like that will deteriorate quickly as the rubber is being stressed much more than the first method you showed. Nice video

[@bearsleak735]

The purpose of this video is mainly for people who are about to use a head gasket sealer product. So these would be a temporary bypass rather than a long-term thing

[@ManWhatever1]

The coolant will already be flowing through the main radiator so there is no pressure build up on these plugged hoses. Even when the thermostat closes off the water pump doesn't put alot of pressure on the outlet hoses as it functions as a coolant circulator inside the engine.

[@michaelmartinez9602]

Hey but that method with the pliers I don’t understand how that would work your just blocking the coolant and won’t be able to circulate

[@charlesrobert6211]

Will a clogged heater core cause the engine to overheat? I have new radiator, water pump and thermostat, for first ten miles the heat is normal but then shoots up to extreme hot where it will fluctuate up and down at the top of the heat limit.

[@hunterhatersluvme9321]

Sounds like you need to bleed your system of air

[@charlesrobert6211]

@@hunterhatersluvme9321 Thanks, I never thought of that.

[@hunterhatersluvme9321]

U should be able to flush your heater core with a water hose if u think it’s clogged just cap off your water pump or have a bucket to catch the coolant it’s kinda expensive tho . I would start by burping your system of air

[@matt75hooper]

*WARNING* Replacing hose ? The heater core pipe has a metal lip that the proper "Quick Release Fitting" must snap over & lock in place to ward off any pressure. ---> Most 5.4L Motors : Hose with fitting : F65Z18472BBC Do Not Use Clamps. They blow off in 2 weeks flat.

[@235LAKIS]

Έπρεπε να είχα δει το βίντεό σου πριν 3 μέρες. Έριξα στεγανοποιητικό στο αυτοκίνητο και καταστράφηκε το ψυγείο του καλοριφέρ.Χθές το άλλαξα..

[@djstatyk1540]

My heater core died last winter. Dealt with it, now that it's getting cooler, I'm looking to replace ot

[@kevindavis2764]

Lots of unnecessary steps here. Remove the upper heater hose completely and disconnect the lower from the core. Loop the lower hose back to the engine where the upper hose was connected. Place the two clamps from the upper hose on any new bends you make to prevent kinking.

[@terryharmon4115]

When you bypass the heater core like that doesn't that prevent heat both defrost and regular heat?

[@Just.A.T-Rex]

Yes. Can always buy a 12v dash heater, defroster. This isn’t isnt meant to be permanent more of a way to but you time especially when you don’t need heat.

[@williamflores3980]

I did bypass, but my car is overheating.

[@deniedthekidd9564]

I just did this shit to my 2008 Chevy Equinox While buzzed luke 45 mi utes ago and it took all day had too remove a few part to access them but did this tge same way in the vid and i kid you not my Suv is fine

[@jonesdarnell2486]

Does your heat work?

[@da324]

@@jonesdarnell2486 If you bypass your HEATER core what do you think?

[@mileswatkins6472]

Why would you need to bypass your heater core for ?

[@jermainemitchell4407]

Miles Watkins it stops your car from leaking antifreeze and smoking from under the hood or through the vents. It's a good thing to do for the time being if you don't have the money to replace heater core.

[@ManWhatever1]

It is much easier and cheaper than replacing a leaking heater core. And if you live in a hot climate area where you don't need the heater why bother fixing it?

[@gregmccarter5386]

When you put that junk In to stop leak..ie lol..that way you won't need to waste any more money than you need to..when you will need to replace head gasket..or entire engine

[@tannerkey2128]

Yeah mine calls for 7 hrs labor time...can't afford that at the moment

[@freaksinuniform438]

Stops smoke coming into the air vents or over heating so u can use your ac again it's much cheaper then having your hole dashboard removed only down side is u lose your heat and defrost but if u live in tx like me u want your ac fast

[@edwinmusyoka2668]

Why bypass? Just asking

[@lastof4512]

Edwin Musyoka Because replacement parts are expensive and if it's hot out you not need it puss mine is leaking inside my passenger side foot well and it's draining my water so bypassing the leak saves a worse problem

[@bearsleak735]

A couple of reasons for bypassing. Number one is if you have a clogged or leaking heater core and can't get to replacing it right away. Number two is if you have blown head gasket and use a stop leak product. By passing the heater core allows for a greater antifreeze flow rate and less chance that it will clog you system. With bears true blue head gasket sealer (and others), you remove the bypass after yoy are finishing with using the sealer.

[@r129r16pfl]

weight reduction, you can delete the heater core

[@Accumulator1]

Yeah don't worry about a heater core. Just wear insulated socks in the winter to keep your toes from freezing off.

[@giorgiocisilino4874]

also the heater core causes the windshield to fog up and cannot see out the windshield, by bypassing one can safely drive to dealership.a dealership that knows how to properly repair the heater core. 8 - 10 hrs job replacing a c4 vettes and a 8-1000 dollar repair.

[@ogbee9690]

Can you undo a heater core bypass? I bought a car off a private seller and didn’t even notice he bypassed it.

[@TampaSupastar22]

do not bypass your heater core getting it fixed is much cheaper in the long run...

[@ManWhatever1]

How so?

[@scottkelley6584]

idiot

[@steven6692]

I have a question...why not just put 2 rubber plugs at each end on the engine side ( inlet & outlet ) would it work the same..? Thank you!

[@bobbyentertainment3516]

yes lol im going to try it!! thanks