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Old 10-16-2010, 03:41 PM   #1
Cusson
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Default Manufacturer Defect? Radiator Fan Tears Top Radiator Hose

Yesterday I was driving my car around and smoke started to come from under my hood. I immediately smelled coolant and knew it was some kind of leak. I pulled into a nearby parking lot and popped the hood. My whole engine bay was covered in coolant and I saw it spewing from a hole in the underside of my upper radiator hose. The hole was caused by the radiator fan blades hitting the hose. This is actually the second time this has happened to my car. The first time was back in 2007 and the hole was in the exact same place.

When the car is off there is about a half inch gap between the hose and the fan blades but I can only assume that when the engine torques, it brings the radiator hose in contact with the fan blades spinning. I'm just wondering if this is something that has happened to other people's cars? If not, I just wanted to give everyone a heads up to check their radiator hoses for wearing. When I picked up a replacement hose at the Subaru dealership they quickly denied it was anything they had seen in the past, but I got to believe it's some sort of defect. This has happened twice already and it's something that never should've happened in the first place.

Save yourself the trouble of cleaning up a nasty mess and buying replacement coolant and check up on that hose. I really hope this doesn't happen again on my car.
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Old 10-16-2010, 06:29 PM   #2
mbaker
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stock radiator? wait it doesnt even matter... just trim the hose... done!

mike
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Old 10-16-2010, 07:55 PM   #3
Flesher
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This happened to me yesterday as well. It looks like there's a sleeve on there that was intended to prevent this, but mine must have migrated away from it's intended area.
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Old 10-16-2010, 07:58 PM   #4
jmlaser
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it happened to me last winter. Just cruising on the highway. must have been worn and then the extreme cold did it in
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Old 11-17-2010, 11:31 PM   #5
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This happened to me back in september. $13 from Napa and I was back on the road.
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Old 11-18-2010, 09:33 AM   #6
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trim the hose and put back the stock rubber sleeve on your replacement hose.
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Old 11-18-2010, 04:40 PM   #7
fastwrx25
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if this is happening often, consider new engine+tranny mounts.
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Old 11-18-2010, 05:21 PM   #8
340Duster
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+1 for trimming the hose. Trim the end of the hose and it will pull it away from the fans. Then there's no issue. Also watch out for the alternator pulley.
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Old 11-18-2010, 06:25 PM   #9
gsla72
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I used part of my old hose cut down and slit in half to reinforce the sleeve that was already there. It dosen't look like it should hit it, but i figure the extra five minutes was worth the peace of mind.
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Old 06-12-2011, 01:21 AM   #10
CrazyButHappy
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This exact thing happened to me as well, but my motor mounts and transmission mounts are worn out. I wish the Subaru techs at the dealership had mentioned this when I bought a new radiator and hoses. It seems like I just got the bitter sweet smell of cooked coolant out of my car after the radiator split open.
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Old 06-12-2011, 01:39 AM   #11
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Quote:
Originally Posted by fastwrx25 View Post
if this is happening often, consider new engine+tranny mounts.
That. Also trim the hose on either side as well. Particularly important if you pipit in an after market radiator ( the fan hits the hose at idle).
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Old 06-12-2011, 11:55 AM   #12
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+1

Quote:
Originally Posted by fastwrx25 View Post
if this is happening often, consider new engine+tranny mounts.
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Old 07-07-2011, 01:06 AM   #13
T-REV16
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I just put an aluminum radiator on mine today and this exact same thing happened to me when I was out test driving it. I taped the hose and unplugged the fan just so I could get my car home.

I'm going to go buy new radiator hoses and try to trim the top one to see if that helps
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Old 07-07-2011, 02:31 AM   #14
NDS1521
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Same thing happened to me last fall and i just assumed it was from the previous owner accidentally doing while working on it or something. Interesting that this is somewhat common. Ill def be checking my upper hose once in while from now on.
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Old 07-07-2011, 07:27 AM   #15
Vlad
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I didn't have this problem, but saw how easy it can happen with the aluminum radiator and took a long time trimming both the top and the bottom hoses.
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Old 07-07-2011, 11:33 AM   #16
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Quote:
Originally Posted by T-REV16 View Post
I just put an aluminum radiator on mine today and this exact same thing happened to me when I was out test driving it. I taped the hose and unplugged the fan just so I could get my car home.

I'm going to go buy new radiator hoses and try to trim the top one to see if that helps
Unplugging the fan won't stop them from spinning and cutting the hose again. You need to tape the fan in place so the wind won't spin it.

I went through 3 hoses at one track day. I ended up pulling the fan.

Also, check your upper radiator mounts.
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Old 07-07-2011, 10:50 PM   #17
02MillzRex
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Happened to me.....
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Old 01-13-2012, 11:31 AM   #18
SubeSobczak
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Same thing happened to me, finally wore down enough to start spraying coolant everywhere.. Huge mess
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Old 01-28-2012, 11:29 PM   #19
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05 wrx here. same problem. car started smoking, so i pulled over and found coolant spewing out of the upper radiator hose. looked like it was from the fan rubbing over time. seems like a bad engineering choice to me.
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Old 05-19-2012, 01:00 AM   #20
Magnum626
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Just happened to me today.

I'm gonna have to get my mounts checked. I had the hose put in with a new rad in January. Only started smelling coolant last few weeks but couldnt find it. I thought it wsa the pulley rubbing on it but couldnt find anything there. Didn't even know it was coming from the hose since the stock air dam thing was over it.

I couldn't figure why it started only happening though. It was clear for over 3 months, the way it was cut it was like it was getting closer and closer to the fan in just a few weeks or something.
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Old 05-19-2012, 02:14 AM   #21
paulpat
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Yup same here. Seriously i just trimmed it so it wouldnt have that problem.
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Old 05-19-2012, 12:50 PM   #22
Magnum626
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I think I might need new motor mounts. Looks like the engine was moving more than normal which probably contributed to the wear on the upper rad hose causing the fan to get closer to it.

http://forums.nasioc.com/forums/show...7#post37178097
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Old 05-19-2012, 01:33 PM   #23
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Quote:
Originally Posted by Magnum626
I think I might need new motor mounts. Looks like the engine was moving more than normal which probably contributed to the wear on the upper rad hose causing the fan to get closer to it.

http://forums.nasioc.com/forums/show...7#post37178097
U might I just had mine ripped by the fan and replaced motor mounts and all has been well.
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Old 06-11-2012, 04:15 PM   #24
Gods_Pinky_Toe
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This happened to me this past Sunday, this thread has been extremely helpful. My thanks to all the contributors!!!
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Old 06-12-2012, 09:08 AM   #25
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Quote:
Originally Posted by Gods_Pinky_Toe
This happened to me this past Sunday, this thread has been extremely helpful. My thanks to all the contributors!!!
Yeah mine went this past Sunday as well, I'm going to replace the engine mounts, this is the second time this has happened to me. With the engine off the fan does not hit the hose, the only thing I can see causing this is and expanding hose and the engine moving around on the mounts.
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