How to Replace Radiator 01-05 Honda Civic

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for quality replacement parts and the best service on the Internet. Hi, I’m Mike from 1A Auto. I hope this how-to video helps you out, and
next time you need parts for your vehicle, think of Thanks. In this video, we’re going to show you a radiator
replacement. This is a 2003 Honda Civic. This is the same basically for 2001 to 2005
Civic and Acura EL with the four-cylinder engine. Items you’ll need include a new radiator from, 10 millimeter wrench or socket ratchet extensions, Phillips and flat blade
screwdrivers, curved, needle nose and standard pliers, drain pan and funnel, additional anti-freeze,
and some penetrating oil. There are four clips at the top to remove. Okay, at the front of the wheel well, on each
side, is a 10 millimeter bolt right here. You need to remove, and again, this is on
each side. Also on each side, you’ll want to pull the
wheel well down. Underneath, there should be a series of these
push pins, just like the top. Release each side just by pulling firmly. Then, you may have to just pull a little bit
and they’ll come off. Loosen your negative battery cable with a
10mm wrench. Pull it up and off and remove it. I’ve got a larger wrench to hold on to the
bolt from this side. Then loosen it up and disconnect your positive
cable second, pull it off, and you just kind of push them down so they don’t come back
and hit the battery. 10 millimeter bolt to remove here, and then
a 10 millimeter nut here. Your drain is right under the center. There’s actually a little hole right under
this cover, and you can see it right here, and I’m just going to use a little pair of
pliers just to help us get that tight plug going. Okay, want these to turn a little bit. Just turn it out slowly, and obviously you
don’t want to do this while the engine is hot. Once you get it draining, we’ll move the radiator
cap to allow air in and allow it to drain. We’re lucky enough. I did spray it down, but the way it was put
together is actually just a hook at the bottom, so you can unhook that and pull the retainer
up and off. Then, this little protective cover comes up
and off as well. Now you can lift your battery up and out. Remove the rest of your battery retainer. There’s a 10 millimeter bolt holding the reservoir
right here. Remove the bolt with your socket, and ratchet,
and extension. Lift it up and out, and just un-clip the hose
as you go. Okay, there’s just a little wire clip. Sometimes you can actually just use your fingers
and pull it off towards the bottle, and then a pair of pliers will help you just break
this hose loose. Then twist and pull it off. We’re going to remove this 10 millimeter bolt
to remove the ground strap and get it out of the way, then use pliers to pinch the clamp,
remove this hose, and pull it up out of the way. Then, there’s two 10 millimeter bolts that
hold the fan assembly: one here, and then one back over here. Then you want to disconnect the connection
as well. Just a tab here to press. Sometimes you pull this. It should slide down and off, but press the
connector and disconnect. 10 millimeter socket with the ratchet extension. Pair of pliers, squeeze the clamp, pull it
back, twist the hose to break it free, pull it off. You may want to have a drip pan underneath,
just to make sure no coolant comes out and drips on the floor. Now we’ll remove the two bolts that hold the
fan. Anything that you can do to give yourself
a little more space, which one thing is to disconnect this coolant temperature sensor. Just has a tab on the side. Press the tab and we’ll pull it off. I just pulled the hose up out of the way. The fan pulls up, and then you can slide it
some to the side. You may have to reach down and push your lower
hose a little bit. It’s just a matter of working it out. Your drain is right under the center. There’s actually a little hole right into
this cover. You can see it right here. We’re just going to us a little pair of pliers
just to help us get that going. Just turn it out slowly, and obviously you
don’t want to do this while the engine is hot. Once you get it draining, remove the radiator
cap to allow air in and allow it to drain. Remove the lower radiator hose from the engine. Pinch the clamp with pliers, and pull the
clamp down and off. Usually you can twist the hose to break it
free. It’s good to have a drain pan underneath just
in case any comes out, but no coolant should come out. Now we want to disconnect the transmission
coolant lines here and here. You definitely want a drain pan underneath
for these. For these clamps, it’s best to have curved
pliers or a big set of needle nose pliers. I’m sure Honda has some special set of hose
clamp pliers, but squeeze and pull the clamp off. Same thing here. Go from the top, squeeze, pull the clamp off. Grab a regular set of pliers. Make sure you can spin the hose a little bit. Twist it free and pull them off. Again, have a drain pan underneath. Disconnect the left hand fan here. Just press on the top and pull out the connector. Now, remove six 10 millimeter bolts, two that
hold the top of the fan in place, and the two bolts that hold the condenser, and two
10 millimeter bolts that hold the radiator brackets. Just remove the brackets so they don’t get
lost. You want to remove this wiring harness clip
here, so use a small pair of pliers. Squeeze the teeth here and push it through. Now you can start to pull the fan up and out
until you get to here, and there’s another couple connectors that are clipped to the
fan. This larger one, press this clip here, and
then you should be able to pull it off. They’re always rusty though, so they don’t
really like to come off. If you can’t get those off the bracket, as
in our case, the Phillips screw that holds the bracket on. Remove this little clip here to free that
hose. Pliers, squeeze as you pull up. With the radiator recovery hose out and this
hose out, you can start pulling the radiator up. You’ll need to pull your transmission lines
through, and just make sure it doesn’t get caught on anything. Manipulate your hoses so that everything comes
out. Remove the hoses. Regular pliers for the main hose here. Pull it up and off. Again, long needle nose pliers. Nice and big. Pull these clips up and off. Note the position of these clamps, this is
to the bottom, to the outside. Try and get as much fluid out of the main
tank as you can. You can just kind of block this one up and
dump that into your coolant drain pan. Then to get the transmission fluid out of
these ones, just block your main tank and dump it out. Get as much out as you can. Remove your upper radiator hose and just the
overflow hose. Old radiator that we’ve removed from the vehicle;
new one from 1A Auto. Everything’s the same. Remove the shipping protectors and we can
install it. Get back on the road. Remove the cushions from the bottom of the
old radiator and put them back into the mounting points in the frame. Replace the hoses, just guide those here. We’ll take care of the upper ones once we
have it installed. Okay, put your radiator down in. Slide that hose down around the brace and
put these two down right here. Just carefully
lower your radiator. Try not to damage the fins, and then you can
just kind of reach down, feel those pins, and get them into the cushions. Start here. Clip this hose in. And then the shorter hose goes through the
passenger side. The longer hose goes through the driver side. Then the main radiator hose. Sometimes you can get this clip to lock in
place, and then you just push up on the tab and it locks. Take that protector off. Put your upper hose on and reset the clip. Slide it down a little bit. Grab our harness with the metal bracket and
attempt to reinstall that. Install this clip and slide it down in. Make sure the posts at the bottom go into
the holes. Install your two mounting nuts. Tighten these up, 10 millimeter socket or
a ratchet. We can then reconnect the harness, then our
radiator top mounts. Now, our condenser mounts. Tighten them all up. Two pegs on the bottom here go down into the
holes here. Pull the coolant hose and your lead up and
out of the way. Put your fan down in kind of diagonally. Just a matter of push on the lower hose a
little bit, and continue to feed it down in. Then, this upper corner, you just have to
get around the brace. To get this around, just move it out a little
bit. A little bit of force, push it in behind,
and then it kind of goes down in. Make sure this hose that goes to the coolant
bottle’s out of the way. Then you just have to kind of lift it up and
try to feel for, you can kind of reach down there, feel one of the pegs, feel for the
hole, and get it to slide down in place. Once you do that, the holes should line up
pretty well with the holes in the radiator to mount. Connect the connector. Then, this bolt goes in. 10 millimeter socket and ratchet with an extension,
just tighten them up. Plug in your coolant sensor. Put your hose back on, and refit the clamp. Put your clamp strap back into place. You may not need to take off the ground strap
but ours was in kind of rough shape so we didn’t want to hurt it anymore. Put the clip in place, hose down on. Again, a lot of times you can just use your
fingers on this clip. Sometimes, you might want to use a pair of
pliers. Lower it down in place, clip the hose in as
you go. There, this one goes in there. Down in, and then clip this in up here. Battery in place; put this down in. The hook goes down and in. Reinstall your 10 millimeter bolt, and tighten
it up. Reconnect your positive cable first and then
your negative cable. Tighten up, and tighten. Bumper cover back in place. Make sure you go underneath the latch lever,
and end up on the headlights. Then put these clips back in to hold it in
place. Reinstall this 10 millimeter bolt on each
side. Once the bolt’s back up in, push your fender,
inner fender, or in this case, what’s left of the inner fender, up and in. Okay, so there should be a bunch of clips
in here, but they’re all missing from this car, so we’re going to kind of put it back
together the way it came apart, using some wire ties, and just secure the bottom. We are going to refill the radiator directly
first. I like to recycle the coolant. Never as much comes out as you need to fill
it anyways, so you generally can use your old coolant and then also augment it with
fresh coolant, but if you put a piece of a T-Shirt in and then pour your old coolant
in, that will filter most of the dirt out of it. It takes a little while to drain through the
tee shirt but it works. That’s what we filtered out of the old coolant. We’ll fill it up the rest of the way with
good fresh coolant. You want to use a 50/50 mix. You can buy coolant two ways: You can buy
it full strength and you have to dilute it, or you can also buy it premixed. We’ll fill the radiator first, and then we’ll
fill the overflow bottle. Then fill it. After you do a repair like this, it’s good
idea. Fill it, run your car for
a little while, check the level, run your care for awhile again and just keep checking
the level the first few times you drive the car. Refill your radiator fluid. We are going to refill the radiator directly
first, and I like to recycle the coolant. Never as much comes out as you need to fill
it anyways, so you generally can use your old coolant, and then also augment it with
fresh coolant, but if you put a piece of a T-Shirt in, and then pour your old coolant
in, that will filter most of the dirt out of it. It takes a little while to drain through the
T-Shirt, but it works. Obviously, make sure you have your drain closed. Okay, you can see that’s what we filtered
out of the old coolant, and we’ll fill it up the rest of the way with good, fresh coolant. You want to use a 50-50 mix. You can buy coolant two ways. You can buy it full strength and you have
to dilute it, and you can also buy it pre-mixed. We’ll fill the radiator first, and then we’ll
fill the overflow bottle, and then fill it. And after you do a repair like this it’s a
good idea to fill it, run your car for a little while, check the level, run your car for a
while again, and just keep checking the level the first few times you drive the car. Thanks for tuning in. We hope this video helped you out. Next time you need parts for your car, please
visit Also check out our other helpful how-to and
diagnosis videos.

62 thoughts on “How to Replace Radiator 01-05 Honda Civic

  1. I have a 2003 Honda Civic EX my Old radiator doesn't have the two transmission hose on the bottom and I just bought a radiator that has the two transmission hose can I still install the new one without installing anything in the bottom of the new radiator?

  2. Great Videos! Do you know which one of those transmission cooling hoses are the return line to the transmission? Thanks!

  3. I just did this repair on my 2002 civic and it was pretty much the same except subtle differences. Took me about 3 hours for the whole job but saved me hundreds in labor! Thanks for the video!

  4. Hi 1A Auto. I would know about the oil in radiator. is it transmission oil? What i have to do to replace this old oil? Thx.

  5. I'm doing this repair on Saturday and I'm going to be replacing the thermostat along with the upper and lower hoses. I'm not sure why you wouldn't replace the upper and lower hoses or the thermostat I mean that's just me. anytime I do a radiator and I know the hoses or the thermostat have never been replaced I typically do it all at once. but great job on the video very detailed

  6. Pls help I have Honda Civic 2001 automatic transmission I want to replace my Radiator with 2 row radiator But I can't find it for (automattransmission ) is ONLY for manual and transmission

  7. thanks for your excellent video. just finished the job and it took about 3 hours from start to finish. Your tricks really helped a lot but did find it easier to just completely remove the upper radiator hose. You did a great job and i'll definitely keep 1aauto in mind next time parts are needed for our autos. Holy moses! Just saw the link to the radiator below. i paid twice that at autozone

  8. Great video. Helped me replace my radiator. I didn't have to replace the fans, so I skipped a few steps, but thank you for the great instructions!

  9. the local mechanic buddy want 550 for this job, I think i could this for like 100 bucks tops, with coolant, new radiator, etc. I am not looking forward to doing it, but i'm going to get up early saturday morning and get at it. spend the day, thanks to this video

  10. Great video, it helped me to do the job. Also, don't reuse the little clip at the bottom of the overflow tank, put a worm type clamp. Mine ended up being too loos and my coolant was leaking from there.

  11. How the hell he removed the second fan ( the one next to the A/C components) is beyond me! I tried and there is just no way !

  12. Thank you so very much ! Because of this tutorial of yours , i saved me and my family money ! So very grateful !

  13. Is that dark brown fluid burnt up transmission fluid? I removed my radiator to my 02 civic that has been overheating and throwing a check engine light and it will literally not move if it overheats too much.. trying to figure out what needs replacing.. and this dark fluid came out.. been thinking the trans is shot but idk

  14. I had to fix this in a hurry. I have 2 cars and they were both broken down. didn't have the luxury of waiting on a part. looked up this video. Excellent. Nothing but a time saver for sure. Now I'm ready to go tonight! Thanks.

  15. Do you guys also sell the hoses that go along with it? The tranny line going back into the transmission burst at the radiator so I have to replace the radiator and that hose, but I want to replace all the hoses just so I have new hose and one less thing to worry about

  16. THANKS a million with this video I was able to change the radiator in 2 days but I am slow now my radiator cap doesnt fit and I wonder wether I could use a dremel to erase a little lip inside the new radiator hole should I ???is there different cap size in radiators?? should i use coolant or add water you are talking of a 50/50 mix and what is transmission fluid oil or ??? One again many thanks
    I am french do you sell overseas ??? seeya

  17. You pull out a radiator from manual transmission, and the you show different one with the male gold connectors. Please edit your video. Lol!

  18. Excellent video! I followed it for my '01 Civic, and everything went smoothly. Removing the front bumper cover, both fans, and all hoses is the way to go!

  19. I've been working on cars all my life and could've figured it out by myself…BUT! this tutorial saved me a lot of time. Thanks guy! 🙂

  20. Great clean step by step video that helped me change the radiator in my car. Thanks a lot. I noticed that both the fans were not working after this radiator change. Just found out at another youtube that you have to bleed the air in the radiator (using a 17mm) on top.

  21. I greatly appreciate all your videos. I especially like the way you show every step for putting it back together. A lot of other folks' videos will say something along the lines of, "Just reverse the process to reassemble" which is really no help at all. Great job!

  22. Greetings. @ about 11:03 you begin to replace the small poses which I believe are for the transmission lime in and out. What are those fittings called and how much are they? do you know the size and thread?

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