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I have dodge trucks and have been doing this for 15 years. I fill the core with clr, let sit for an hour and then flush it with plain water. Works every time. I can't wait to hear why i shouldn't be doing this😂😂. Cheers!

Great video but here’s an extra tip, before installing the hoses back run coolant through the heater core to flush out all the water so you maintain a proper 50/50 mixture of antifreeze and water

Thank you so much for the videos. Inspired to do mine God bless your channel.

Great info. Thanks!

Do not do it like this. Old Heater cores get brittle where the hoses attach. If you bust off one of those metal nipples then you will need to replace the whole core which involves dash removal. Disconnect the hoses further down and flush from there. You've been warned.

Excellent instructions. Great soundtrack 👌

excellent video and parts, thanks

Thanks, good production.

I need to try this on a 1998 Oldsmobile Aurora. The Heat quit working immediately after a coolant flush. When I replaced the Anti-Freeze, the County extension Agency said if it less than 5 gallons, to dump the coolant down the toilet. I couldn't believe their answer! So I have a 5 gallon Home Depot Bucket with the old Coolant I need to dispose of. Thank you for the video. Much appreciated.

FYI SOME VEHICLES HAVE PLASTIC HEATER CORE LINES COMING OUT THRU FIREWALL. SO DON'T TRY AND REMOVE HOSES ON OLD VEHICLES (MERCURY VILLAGER / NISSAN QUEST) INSTEAD CUT IN MIDDLE & REPAIR WITH A DOUBLE NIPPLE END SPLICE REPAIR. HOSE CLAMP ON.

Great job...thanks!

Thanks for sharing

Thanks for the tip 👍

Good video! Very informative.

Great Video!!

He needs to do a series on changing the heater core, disassembling the dashboard to changing the heater core out to changing the thermostat. 👈🏿

Am I the only one waiting for him to fire up the truck and say "That fixed it"!

Only way I can move the sediment in BMW heater cores is by pulsing with air and water, water flushing alone often does not work. Drain coolant (not all just under the level of the heater core pipes) and disconnect the two heater core pipes from the engine and expansion tank. Wrap some gaffa (duct) tape around the tip of a typical blower so you can create a seal on either of the two plastic hose connectors, fill the heater core pipes with water from a hose and quickly use the blower to push the water through. You'll usually get a load of sandy coloured water coming out, understand this sand is from the mold when the block is originally cast which has broken loose inside the cooling system. Flush both ways using air and water until it runs clear, then run water through to get the final bits out. Reconnect pipes, refill cooling system and bleed. Enjoy your now toasty heating at last :D

The problem with alot of these heat radiators is their Inlets and outlets tend to be on the same side. Which drastically reduces the area utilization on the heater core, and makes gum ups easier.

Well Done

Those hose block off clamps are what dreams are made of :D

Good job. Would like to suggest for some cars it's hard to get air out and to help with that problem after installing first hose remove the yellow clamp to allow coolant to burp the core then when coolant comes out install the second hose,

thankz man

Very well explained My car make water running sound and water suction sound under dash where heater core is. How can i get rid off

After doing a complete coolant flush, is it possible on a MK4 golf to reverse the pipes to the heater matrix so it now runs in reverse or do they only operate one way round?

you should flush it in the manner that you did the first time and then back flush it the other way the second time to remove all grits and contaminants from the tanks on the heater

I have a 2000 s10 that keeps getting sludge in the cooling system and just pulled my heater core hoses off last night and this was the video I wanted to see. (No water in the oil)

Good game show music!!

finally someone who shows you what to do and not someone who likes to hear themselves talk!

Isn’t a regular garden hose already 5/8”? If so then no adapter needed if you cut up an old hose or cheap one. the female on the old/cheap hose goes on the male garden hose supplying water. Other half can be the outflow. Just a thought.

Ever isolate the core, vacuum and blow it out after flushing it and fill it with CLR overnight or...? Have a 2000 Taurus which are notorious for blocked cores, it's at the bottom of the cooling system. Doing mine tomorrow, using just water doesn't work very well!

Here's a trick I did. I put flush in the system then I reversed the hoses on the input and output to the heater core to get the reverse flow through it. Then drove it till I had about 6 hour's running time on it which was the longer option suggested on the Prestone Flush bottle. I think it worked well but I won't know till winter for sure. It's summer now, hard to tell how the heater will actually work when it's cold. Anyway, thought it was a neat trick, super easy and super low labor to get the reverse flow through the heater core. Hope this helps someone.

Tnks

Did it work?

looks like you replaced the heater core?! looks like a brand new one when you reinstalled the hoses!

Could you use some CLR in the water (with proper sprayer of course)?

I believe I mixed up my heater core hoses! Which hose from the radiator and engine goes to Which connection to the heater core?

Did not know about the block off clamps. Need those. Thanks!

so I am assuming I will need to do this as I had bad heat. But is it too late if you have gone from bad heater, to intermittent overheating, to full overheating?

Dude that introduces minerals into the system though!

On a 2008 Chevy Colorado there's a Yellow Hose connector on the right and a White hose connector on the left. Which side is which?

Do u have the removal tool for a heater hose for a mazda protege? Please

Hi I have a question, if I was to remove one of the heater core hosepipe and add a water hose , will I be able to flush the whole cooling system,

Can you make a video on a heater core replacement on a 2008 scion xb?

I’ve never had to replace one before. Does the radiator usually run just a little hot ( like just a tick above 210) if the heater core is bad?

Thank you for the video. My heater core hoses are permanently sealed to the tubes and I have to cut them to do the flush...can you guys recommend any type of wrap/seal to tape them back together?

I don't even have these problems, but I like knowing what to do when it's time

So if doing a full system drain , its recommended to drain the radiator first then flush the core?

In the end did you attach the hose to the cold one

You should have done a video on that 2006 Chrysler flushing heater core

They sold out of thermostats at a critical time, winter time. Please do a video on changing the thermostat on a 4th Generation Dodge Ram plus list the tools need with socket extensions.

You also changed out the heater core in this video but just did not show that being done? Why

I'm not sure if I have the right hose in the right side of the heater core. Can you help please?

Anyone know what size hoses and fittings to buy? I don't know much about measuring this stuff lol

Luke warm heat on driver side cold on passenger side. Car gets hot while driving and fan kicks in even with heat off. Any advice thinking of doing this flush then replace heater core if the flush doesnt work.

wonder if you can just swap the hoses around and drive it for a while

Did this work? We didn’t get the end result from this video. Question, how about if your Anti freeze is low, would this cause your heat to disappear?

I did several flushes on my 98 camry, went around with water in it for about a month. When I put coolant in it, it started leaking from water pump. Any advice?

I definitely need to get a set of those hose clamp pliers.

If the heater core is clogged resulting in poor circulation of coolant back to the water pump will this cause engine overheat? I have done the thermostat and the car produces heat sometimes. Piping hot in and cold empty line out.

If the block off clamps were not in place would you loose all the coolant? Would it just gush out?

THANKS

Was very subtle but at 5:50 i noticed the inlet and outlet looked NEW or VERY CLEAN compared to before (3:45) ... did u put a new matrix in there or something or did you clean the metal and just EDIT the video?

I have chevy optra and when turning on AC coolent leaks and engine over heats what should i do?

Is it possible that this can cause the vents to blow different temperatures? My 2 passenger vents are blowing a little cool with heat on full blast. I checked all of my blend doors and they're all working fine, I have a 2002 Camry 2.4L

Great clamps. I like the directly to the bucket thing. Thanks

My 02 Ram 1500 isn’t blowing hot air. Coolant is fairly clean and both the inlet and outlet to the heater are hot to the touch. Do you still think flushing the system would help?

I have a flickering noise behind the glove box .. Blower doesn't have force when flickering

What about venting the heater core? Wouldn’t the trapped air cause heating issues?

I have heat in the back of my Ford expedition but no in front if i do flush work or not

I have an 06 Dodge Charger rt and I'm only getting heat when I accelerate its topped off and i replaced the thermostat about a year ago but never overheats

Hello..im tryna flush my 2011 kia sorento heater core..i feel one is hot and one is cold..question..which side would i send water thru? The cold side or hot side?

So the hoter hose is the inlet right? And the cooler is the inlet?

Looks like a new heater core to me

What if both hoses are hot in my case on a 2010 Chrysler Sebring

what about flushing the water that's left in the heater core?

I flushed my 1997 C1500's entire cooling system with tap water. I plan on replacing it with 50/50 coolant, but I am concerned with the tap water that is left in the heater core. Should I be worried about corrosion from the left over tap water or will it be diluted with the fresh coolant enough to not matter?

How to replace rear heater çore 2008 hyundai veracruz 3.8

Well I know this is a Chevy when you're taking off the air box be very very careful with the mass airflow sensor. try not to bang it around or drop it you could damage it and your truck will not run properly... It also a good time to inspect the mass air flow sensor for any dirt build up. it's not a cheap to replace the mass air sensor..... Just FYI.

I'm attempting to flush my G/F' s heater core in a 12' dodge avenger sxt, but where her inlet & outlet goes into the firewall hers has what look like aluminum tubing rather than hoes & they run all the way to the front near the radiator before each of them finally connect to hoes....am I looking at the correct tubing to attempt to do the flush you're doing in your video here? I'm fairly certain I'm at least looking at something related to the cooling/heating system cuz 1 of the tubes has a little outlet w/ a cap & tag around it that says (WARNING! Do not operate vehicle while system is under pressure! ACTION required, release vacuum) I opened this cap & found what looked like a tire valve stem pressure releaser inside....I pressed on it lightly to discover it had a TON of pressure behind it.... I'm new to heating/cooling system maintenance on any vehicle so I immediately stopped releasing pressure in case this wasn't something I should've done.... can you shed any light for me as to what I'm looking at? & how would I go about completing this same process in her avenger? If I'm leaving any helpful info out plz just ask & I'll do my best to give you any other useful details on what I'm dealing with or looking at...any help you could offer me would be extremely appreciated.... I've had her car on Jack stands now for 2 days while having to share my whip....so you can imagine how desperate I'm getting tryin to finish this thermostat swap, & coolant/heater core flush as soon as possible lol. Thanks for any helpful info you can offer me

Want to flush my heater core on 2009 Dodge Ram 1500, any tips or videos

What if heater core has a unknown leak,will it flood floor in cab?

Where can I yellow clamps

I have a 07 ford explorer. I am having over heating issues. Its not a head gasket. Started with the heat only working when I was on the gas. Then one day as I was driving the temp gauge kept going hot to cold. I replaced the thermostat, the radiator, sensor, noticed it leaking and changed water pump... It still overhears within 5mins of driving. Any advice?

Well did you start truck to see if it worked did I miss that part ....

Why am I leaking coolant now? Is it a bad heater core?

Don't use Dex-Cool in these engines,It crystalizes in the back ports I have a 5.7l with 10,000 miles had to do a intake manifold gasket and the back cooling ports where solid, clogged had to clean them out and I went back to the green anti-freeze.

When doing this job on my car is there a certain type of pump I need and certain power you recommend so it won’t over power my heater core? And if there is sludge buildup will CLR clear it out, if so do I do a follow up with distilled water to clear out the CLR once it has done its job?

At 5:30.. is it safe to do this with a water hose? Just won't be able to get the water back out.

i didnt run mineralized tap water thru mine... I bought two hoses to attach to the heater spouts about 3 ft long each... filled them with distilled water and then used an air gun to flush one way, and repeated the other way.. that way no corrosion could happen in the future... peace

Hi I decided to give my old car a coolant change following your video. I have noticed that the passenger and driver foot well is wet. Will flushing out the coolant solve this. If not will something like k seal or other make of hole blocker do the job

So is the hot hose the inlet or out let?

Boiling water mixed with CLR. Let sit for one hour. Then flush.

What if I have heat but there is a gurgling sound coming from my dash when I start it in the mornings, I burped the coolant system already and its still doing it? do I need to bleed the heater core next?

Will this fix engine overheating?

Totally confused say upper or lower, you grab with the hand in the way.

please need more for Honda civic 96 00 '👍

My sons jeep has great heat. But the defroster don't work. Windows fog over instantly. No liquid on the floorboards. Possible plugged heater core?

How do you know if the heater core needs to be flushed or if it needs to be replaced?? I have a 97 bravada and the heat blows low the water pump has been replaced and the engine doesn’t run hot has coolant. Do I need to flush the engine or the core?