How To Bypass A Heater Core
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- čas přidán 6. 09. 2024
- In this video Tim will show you how to bypass a your vehicles heater core. This may be used sometimes for a quick fix if your heater core is leaking onto your floorboard.
What you'll need:
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Or if you want to buy locally: "Gates 18701" You'll also need 5/8" to 5/8" adapter and 5/8" to 3/4" adapter.
And here is one with a 3/4" end and a 5/8" end: "Dayco 87629" in which case you'll need a 5/8" to 5/8" nipple and a 3/4" to 3/4" nipple.
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Disclaimer - This product is meant for entertainment purposes only. Your mileage may vary. Do not try this at home. Void where prohibited. Some assembly required. For off-road use only. Slippery when wet. Batteries not included. Do not use while operating a motor vehicle, heavy equipment, cherokee, wrangler, or any jeep vehicle. May be too intense for some viewers and children under 30 years of age. Please remain seated until the ride has come to a complete stop. Studies have shown viewing these videos causes increased cancer risks in laboratory test people. I am not a professional, I have no training, I'm not even particularly good at horse whispering. Don't believe everything that you know. Please keep your hands in the vehicle at all times. Do not tap on glass. Do not eat anything that has been on the floor for more than 3 days. Keep your hands to yourself. Not to be taken internally. Reproduction strictly prohibited. Driver does not carry cash. Objects in jeep mirrors may be farther than they appear.
09521
I just did mine on the land cruiser prado (Aussie model), I just disconnected from where the hoses go into the firewall and joined both with a 3/4 inch brass connector and used the original hose clamps.
If I had only known where to find those fittings here in Barbados, I would go with them too, but I had to make a u-fitting with copper pipe and elbows or 45degree elbows.I need to replace the vacuum valve and I had the hoses connected to heater core direct with out the valve, but it causes the engine to warm up a lot slower so I by-passed the core again and I started getting leaks so I just bought complete new hoses because the van is a 2001 so it needs new hoses.I hope my problem and yours are solved!!!
I don't know much about cars. But I can say this video helped me bypass my heater core in a 2004 silverado I've had since day one. It was simple to do and now my truck don't smell funny. Hope there is no long term side effects.. I want to own my truck 10 more years! Once again thanks for the great video.
It's been 7 years, is she still running?
@@taydriver5199 Yup lol
@@flamesburnred nice. I drive a VW from 2001 1.6 petrol and it's still going.
This bypass is exactly what I need to do. Thanks for posting it. I have a 98 GC that the Heater Core has failed and leaked coolant into the rear passenger floor board via the heater outlet there. I live in N Fl so not having heat will only be a minor inconvenience during the mild winters that we typically have. And because my commute to work is only a mile. Thanks for the tip.
Couple things, Why didnt you put the hose clamps over the hose before putting it together so you didnt have to unscrew the hose clamp all the way to put it on?
Also, the heater core (just like the rest of the cooling system) is designed to withstand a max of 16psi, so if you are going to use an air compressor to flush out your heater core do not exceed 16psi or you risk blowing the seams of the heater core out. 8 to 10psi is more than enough to flush out a heater core
How true you are. His is bad already so blowing the left over anti freeze out won’t hurt.
But if you are cleaning a good one you need to be careful ov how many lbs of pressure you put in it.
Great video, it's exactly what I needed to see. I've just pulled the HVAC box out of my 1993 Jeep Grand Cherokee 4.0L to fix the air doors, and I discovered that the heater core is just starting to leak. I live in a hot country, so I don't actually need it. It's now in the trash, and you've given me the information I need to run the bypass. Thanks guys!
Nicely done. Very clear and concise. I'm doing it on my 94 GMC Sonoma, but this solution is so simple, it's completely transferable. Thanks, Tim!
My 29 year old 1993 heater core just went a few hrs ago. Engine overheated for 4 minutes while stuck at two lights. Turned engine off sitting at each. Antifreeze fog was gushing out of the top defog dash vents. Pulled over. Engine cooled down. Antifeeze dripping on the pavement below the fan/core unit luckily in front of the dash on the engine side of the firewall, not inside the dash. Googled symptoms, then realized it was the heater core. Suspected it was because smoke was in the cab & not the engine compartment. Never replaced one before. Know nothing about them. Called a mechanic and he told me I could bypass it with a U shaped hose. I'm in L.A. County by the beach, so I don't need a heater until December, at the earliest. If ever, as it doesn't get below 38°F here anymore. I'm so, so thankful there's DIY CZcams videos on replacing the core on my make & model year. And which screws, bolts, hoses, and housings to move out of the way. Plus DIY heater core bypass videos like this one here, online. Need to bypass it because I can't afford a new core right now I didn't expect different sized hoses. More complicated than I thought, but still, simple and brilliant. O'Reilly, AutoZone, & NAPA are within a 2 mile walk of me. I even pulled over in the shade and have until next Monday to move for the street sweeper. I'm doing Vanlife traveling/living in this van, and loving it. Nothing ever breaks on this 1993 Dodge Ram B250. I love fixing automotive stuff, so finally, I have some work to do on the most reliable vehicle I've ever owned - a Dodge. (Tranny was rebuilt in 2016, still pristine). 194,000 on it. Barely any rust - a Tustin, CA van. All new mounts on it, now. Runs so smooth. Need to fill gallon jugs of water, to refill radiator & start my cooled down engine to keep my phone charged. Amost have top of core housing unit off. Might be impossible to get back left screw off of it. May need to remove the whole housing anyway (may have never been removed, and cleaned up before). Cleaned the leaf litter out of the front already. Stuff has dropped back behind it over the years and needs retrieval.
Thanks a ton for this video! This is my first bypass job.
I SUFFER FOR 3 YEARS AT WORK IN THE SUMMERS FOR NOT KNOWING WHAT TO DO.
MY BOSS HAS THIS VIDEO.
HE BETTER GET TO IT
THX.
Thank you, you saved me. I have a 2000 Explorer with 225K on it. Replacing the heater core costs nearly $1000, and doing it myself is beyond my abilities. I live in Southern Nevada, so I can live without a heater.
Michael McDougall how does it cost you nearly 1000 dollars?
@@donniecook4459overpriced mechanic
I did something similar to my Ranger. Except I just unplugged the hose from the heater core and connected them there. Then I don't have to replace the hose when I eventually get to replacing the heater core.
+3ABTPA that's what Im trying to do
This is going to get my much needed Grand Cherokee back on the road (and my wife off my back!) Thanks!
Lol
Very well done video. Thanks much. I'm applying this to a Ford Crown Vic. I gotta say my favorite part was probably your buddy running along with you on the test drive. Best 4 wheeling buddy ever, I bet.
Coby Wright How did that work out? I may have to do the same thing to my Grand Marquis. Are both Crown Vic heater hoses the same size?
Outstanding work Sir.....I dont have a $500.00 bill to replace a heater core so this saved me tons and got me going...thank you!
Your disclaimer has me over here smiling. The video was really helpful. Thanks for the elbow idea.
Just finished doing the same thing, but with a 90 degree joint on a 2000 Chevy Silverado 2500, very versatile, works great for a temporary fix. I didnt have a compressor at my disposal, so i grabbed a hooka hose that i wasnt using, and pushed it into one end of the heater core, and blew into it and got most of the liquid out of the heater core. Thanks for the help Tim!!
You used a hooka hose for a joint?
What a Class guy doing a Class job. You can tell the parents did a great job.
Simple and clear explanation. Great how-to video, Tim!
Man, thank you for this video! I just changed my thermostat and coolant, and my car overheated on the road. I have since learned that the coolant system needs to be flushed, but I'm still unsure that my car won't overheat again. I believe bypassing the heater core should allow the coolant to operate at a cooler temperature(correct me if i'm wrong please). Your solution is simple and elegant. Being from Florida it's very rare we get so cold I need anything heater related. I'll just buy 2 spare hoses in case I need to resell the car or get rid of it. Thank you for this.
Did you get this fixed. What'd you do?
Wow I’m so glad I saw this. They bypassed the heater core in my neon. They didn’t used a u shaped hose. They used a hose and it was pinched. Now I’m wondering what to do about the next step. I hooked the hoses back up and I guess I’d better disconnect them again and use a u hose until I find out why they by passed it it the first place.
Very useful video as my core just kicked the bucket yesterday. Luckily there's only a month of winter left so I can hack it. Fix the actual heater core before next fall. Allows me to fix when my schedule allows and weather is decent.
I'd recommend using some thick solid Nitrile Gloves when dealing with fluids. Thanks for the great tutorial.
Great job kid. I used to have a Jeep Cherokee 1991 back in the old days and I see a lot of similarities in that engine. I'm not missing it though. I prefer the Subaru's configuration with the oil filter right on top.
simply the best bypass I've seen; thank you very much man!
Also as I read below it IS illegal to disconnect the heater core. All cars are registered in the state of CA must have an operating defroster to keep the windshield fog free in the winter. How will the cops know? It's real easy to tell because someone is constantly wiping the windshield so they can see out. Obviously it's easy to get away with it during warmer weather. Plus many people don't know this fact: in other states they have safety inspections your car must pass before it can be registered. We don't have that here in CA so, the CHP has the authority to pull ANY CAR OVER AT ANY TIME TO DO A SAFETY INSPECTION. But they are generally too busy to do this.
i just need mine disconnected to move the rv around in the yard....thanks for input however.
Thank you so much , I have a 94 Acura Vigor thats leaking antifreez into the drivers side floor and after all the money iv already spent id like to fix the issue myself and be able to drive my car again . i think i can after watching this . Again thank you so much .
Thank you sir. I'll be doin this to my car I own the 2001 Honda Civic LX 5-Speed and the heater core is good as of for now due to leftover stop leak but because I recently did a cooling system flush no more stop leaks but stop leaks are useless for heater cores anyway so... but yes I have a leaking heater core.
Should've had the hose clamps on the elbow ready to install when you finished the loop. Otherwise you have to open the clamps entirely and that's a pain that can be avoided
Good and easy. Thanks for the video. I like your 2 door jeep. They are hard to find.
I don't even have a Jeep yet, but I hope to find one before the price of them goes thru the roof.
Great video.Does it have to be looped together? Or could you just remove the hoses completely, Then cap the ends. Thank you
Fantastic idea. Saved me $900.
Good temporary fix. I watch a video on replacing the heater core in my truck and what I think I would do is run the water hoses under the truck into the back seat and build a box with a heater core and fan in it. Could be done in an afternoon. Let alone tearing the dashboard out just to get to the core.
I’ve replaced them in some older trucks and it was pretty easy. Let alone the new models of today. 😩
How would you defrost the windshield?
I was told by bypassing the heater core my radiator would hold fluids again and presently I cant drive Ford Van over 30mph and must add fluids on each trip as otherwise it overheats.
Great video, I will use your technique on a Ford Taurus 99! Thanks for the know how!
Just take the hose of the output and hook it to the thermostat housing it's a tight squeeze but it fits (and it's FREE)
Where did you get the 180 degree hose?
Where can the hose adapters be purchased? Thanks.............
Awesome video. Everything I need to know and to see. Thanks.
This video was really helpful! What did you use to plug your heater core? Is it really necessary, if you're planning on replacing the core, anyway?
Good job. Quick simple and right to the point.
Is there a reason why you didn't just pull off the small hose from the radiator versus cutting that one? I just pulled it off and saved myself from having to cut and buy another adapter piece. I still have that smell, and it still (somehow) has that slimmy shit on my windshield sometimes... i did blow it also.
You just saved me money on my rent thanks brother.....
I know it's an old video and probably won't get a reply but I just bought a 99 wit very lil heat . Flushed the core (hose getting nice and hot to the core ) changed thermostat ,changed water pump ,changed thermostat housing and coolant the heat came on for about 20 minutes (hotter than before not by much ) I shut the Jeep off came back out later in the day and no heat again ! Just warm ! Any other idea ? Runs 188- 195 on my obd 2 scanner and doesn't over heat or anything.
Great video, thx! Where did you get the elbow and connectors?
any auto parts store or amazon links in description...
i just did this to my car by using the same connectors. I just could not find a U tubing so a longer one resolved. Any ideas on how to get some heat inside the car before travelling short distances 5km after leaving work?
Where did you get the adapters and 180 degree bend? Great video
Did you have to bleed the air out. Or just remove radiator cap?
You should first flush the water inside the heat Core otherwise it will cause damage and rust on the long term 👍👍👍👍
Good job
Hello thank you I have a question if the heater core the car may overheating?
One question to u my friend.... where did u buy the connectors to do the bypass and especially that u hose.
Napa
BleepinJeep Thank you sir.... U made it extremely easy to solve my leaking heater core problem. I now have all the time in the world to change that dreaded heater core on my 03 s10.
Very informative and useful. Thank you Tim and BleepinJeep!
My car is a 2002 mercury grand marquis. If I do the bypass, does the air conditioning continue working? Does not the AC need the coolant for its operation? Thank you.
+Bleepingjeep how long can your jeep last like that. Like let's say you order the part and it will take 2 weeks to arrive, will this hold for 2 or more weeks or maybe months or is it just for a few hours?
Juan Santos it'll hold forever, you just wont have heat.
I've 02 liberty.. didnt do the bypass with the 180 degree elbow hose to connect circulation, ,instead i did disconnect both hoses & caped both,, Question will work that way.. appreciate thanks..
I can't find the 180 elbow hose you show anywhere! NAPA, AutoZone, Discount Auto, they all have no clue. Can you tell me where you got it and maybe even the part number?
+Mike Cohen Simple Hardware store has it and so does home depot
I found it at O'Reilly only. Home Depot has no clue. And AutoZone and Advanced showed clearly that they are idiots. Their comments were "If I can't find it in the computer it doesn't exist." OMG really?
+Mike Cohen wells it sounds dumb but its true, what do you want them to say? "Hey I'll make you one right now". I agree, O'reilly is better.
+Mike Cohen Any modern store keep track of their inventory on their databases. I used to work at Target, and I roll my eyes every time some customer doesn't believe me when I say the product they're looking for is sold out or it's not sold here. So I get requested to check this magical back room that somehow defies inventory databases. I get to waste 2 minutes standing in the backroom then come out to say it's not available. If it's not there, then it's not there.
how long can i drive with the elbow can i keep it that way for a year
Where did you purchase the elbow and adapters?
Can I use garden hose connector will it do the work and handle the coolant??please reply.thanks
Can we see a walk around of Tim's jeep?
was your dog helping you look for leaks
That's messed up 😂😂
excellent video but I would like to know if you do a bypass, how are you going to defrost the glasses without heating, please answer my question, thank you
Its just a temporary fix until you can change your leaky heater core.
Very Clean!
Question
1. Will a bad heater core cause over heating on the highway only?
2. Does this apply to a 1996 XJ ?
Thank you in advance
As long as you keep putting coolant/water u won't have a problem.
After this bypass procedure if you still want a heater in the car just go buy a dc/ac car charger adapter and plug a small electric heater to the adapter works everytime on camping trips...
Plastic adapters will withstand 210+ degree coolant temps?
It will take your engine longer time to warm up with that free flow. I would put on short tubes and stick a proper size of plug in each one clamping it tight. Now you will not have any bypass and flow until the thermostat opens.
so how long is this bypass still safe until you actually fix it?
until you need to see out of foggy windows
where did get your fittings
Hi,
Run without heater core,the radiator reservoir level would be lower?engine need less coolant than before?
After i modi that ,I filled same coolant level and run 30miles and stop the car some coolant leak from somewhere
You are using plastic fittings in the video but the link is for brass - won't brass upset the chemistry of coolant?
edit: One Month Later............
Anyone know where to get or a part number for the plastic fittings like in the video? The link is for brass.
Clean job
I would have partially drained the cooling system first but handy video and am going to use your method as a temporary solution for my Jeep TJ heater core problem.
Freakin' heater cores! They should design them to just slip in thru the fire wall. Two bolts!! Instead they make you tear the entire dash apart!!
do you not recommend using rubber cement on the couplings?
Great video, thanks for making it. I might do this on my YJ. Question though, will bypassing the heater core make the engine temperature run hotter (as shown on the temp gauge)? I ask since you have the hot coolant running out of the t-stat and straight back into the water pump inlet.
Nahh
can this be a permanent fix for a leaking heater core? i don't use the heater anyway!
+Kd Mo Yes. About 10 years ago I had to do this on my Taurus. I never used my heater and didn't want to bother with tearing apart the dash to replace the heater core. Stayed that way for a good 5 years before I got rid of the car. Just make sure your hose clamps are nice and secure, and check it from time to time.
imm greatful for the tutorial, but how about one on replacing the heater core insread? Thanks
Thanks a lot. Just saved me from removing my dash.
What kind of bumper is on this Jeep? I've been looking for one that would look good on my 99.
Thanks for the great video. Exactly what I needed for my 97 xj.
I can do that to my 98 Malibu but it's coming the winter and I prefer to dig in the instrument panel to replace the heater core.
Thanks for posting tip. Is it possible to leave the broken heater core in the jeep and mount a new one; somewhere more accessible? Or, would it still be a pain in the ass to tap into the wires and hoses? I have an 02 JGC 4.7L.
+Dube Barton (Dube 11:11) no, the heat is picked up in the box
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?
I'd say that would be a good idea.
i smell coolant in my dash and have it behind of the carpet but the heater core seems to also leak outside the car somewhere and is dripping down and burning on my muffler. can something else cause this on the inside of my car?
are those pool noodles in your finder wells?
where did you get the elbow and the hose connectors
Can you guys make a video on replacing a clutch in an xj?
I like Tim a little better than the normal guy
Nice clean engine bay.
Is this to fix the a/c? And do i need to take my thermostat out?
Great video, from an old gandydancer (railroad builder and mechanic). Two thoughts.... Put the new hose clamps on before assembly. And get some damn disposable gloves!
will bypassing the heater core make the air blowing to the cabin from the ac colder?
Usually not. I can't speak for ever situation, but for the ones I've seen, the air runs through the a/c evaporator (coils inside the car), then it can either go through the heater core, or bypass the heater core and go out the vents. This is accomplished by using a blender door, which adjusts how much air can go into the heater core, and how much air bypasses the heater core.
I'm sure some heat gets from the heater core into the cabin just because the heater core is hot, but not enough that its worth the effort to bypass the heater core. Also, some cars do have a valve to turn the heater core off when not in use, but I don't think any more modern cars use those.
So you didn't need to bleed the system after the bypass?
Is it possible to add a shutoff to the heater hose? Heat seems to bleed through even with mix door closed.
I drive a 2003 Toyota Corolla. Does the engine need the flow from the heater core?
Yes, many cars of the past had a heater control valve to do exactly that. They were vacuum or cable actuated. You can get a junkyard one or an aftermarket one.
This video was useful to me.
Would the AC still work
That will work in a pinch A great video I had to do that when I ruptured A-line
Thank you Tim! Really good demo!
Hi, Can I block using stopper instead of using U joints?
Hell no! You need to join both hoses together in order to allow the normal coolant flow.
+JPGKIll3r Thanks, but does the stopper acts like turn off the heater core?
thank u sir! hopefully i can do the same for my mitsubishi galant.
that was a nice neat bypass
good pointer on the clips
BleepinJeep. Thanks for this video. This is exactly what we have to have done to our car. But the damn machanic we took it to was going to charge us $1200 , that's rediculous. We have right now a black water pip thing that looks similar to the little black water adapter. Do u think that will be fine or not. Please let me know
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