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Old 03-18-2013, 02:52 PM   #26
Mike Wondo
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wish i read this sooner....just had it happen to a brand new mishimoto hose...! frickin fan blade....
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Old 03-18-2013, 03:33 PM   #27
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Quote:
Originally Posted by Mike Wondo View Post
wish i read this sooner....just had it happen to a brand new mishimoto hose...! frickin fan blade....

it isnt the fan...it IS the pulley because you didnt trim the hose to match the wider radiator

if you can make the hose hit the fan your car has been wrecked BAD
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Old 03-21-2013, 11:22 AM   #28
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Scotty I normally like what you say, but my car has never been wrecked.
Although after having my stock radiator replaced with a Mishimoto, I reused the stock hose without trimming it, and it actually was getting cut on both sides, just happened that the fan made a fatal cut before the pulley could.

I'm thinking that it's possible that whatever failed on the original radiator causing you to replace it may have caused the upper hose to lose it's integerity, maybe its a little more swollen or flexible after 100k miles than it was originally.

My 9 year old hose was too big and sloppy to fit without cutting it down to fit with the new radiator. Since that was not done, it was destroyed.

Replacement hose did not require any modification to fit, although I did remove some to try and pull it farther from the fan blades. Looking back after was a waste of time, I didnt gain anything from it.
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Old 03-21-2013, 08:39 PM   #29
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i have looked at the fans and the hose...mmmmmm....several times???....there is no way that the fan hit the hose unless somebody did something stupid...REAL stupid

or the car is wrecked and causes the fan to hit the hose

i just changed my upper and lower hoses and it would take a HUGE blunder to make the hose hit the fan

the PULLEY is RIGHT THERE
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Old 03-21-2013, 11:03 PM   #30
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Scotty, some of the aluminum standoffs the fans mount to on the performance radiators are too long. I've seen this a few times. A simple solution is to remove the fan on that side and use a cutoff wheel to shorten the standoffs up top about a quarter inch. Only do this if there is a gap between the radiator and the front of the fan shroud. Otherwise its not gonna help anyway.

Trey
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Old 03-23-2013, 10:37 PM   #31
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Yeah no lie thats pretty darn scary, it happened to me on my 03'. The Left fan on the radiator was chopping away at the top hose on 7' o'clock of the hose. dint even see it till i ran my hands on the sucker.
Good thing it wasnt a cracked radiator core, thats the worst...
replaced hose and filled the coolant, and it was all good to go (:

ADVICE/TIP*** my bro is a mechanic, if youre sick of the burnt coolant smell, get a small bottle sprayer with water, runn the car and lightly spray around the areas where theres alot of spilt coolant. works (:
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Old 03-24-2013, 12:08 PM   #32
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We are not talking about the fan blades, it is the pulley that eats through the hose right?

The original hose had a doubled section there and the new ones have a mesh that is free to slide around.

Did you notice that one end is shorter than the other by a fraction and there is an arrow on the hose showing the direction of flow and you better follow that recommendation.
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Old 03-24-2013, 12:14 PM   #33
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i think people are mixing their metaphores, here

S T O C K.......fans+radiator = unpossible for the fans to come anywhere near the upper radiator hose.
unpossible
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Old 03-24-2013, 02:28 PM   #34
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If the hose is old / weak it can bulge like a balloon when the coolant is hot. Doesn't explain all cases of fan blade death, but I would imagine a new OEM hose would clear up 99% of these problems. I specify OEM since autozone hoses may be the same size, but not the same thickness or rigidity.
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Old 03-25-2013, 12:25 PM   #35
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This happened to me when I installed an aftermarket radiator as well. I just made sure I had a good amount of clearance by cutting it, as has been suggested above. I also left the mesh that was provided, over the radiator hose, and monitored it for the next couple of weeks to see if any cutting occurred.

Best of luck.
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Old 03-25-2013, 12:58 PM   #36
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I don't understand this thread the more I read it. Do people not properly check clearances when installing aftermarket parts?
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Old 03-25-2013, 04:32 PM   #37
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In my case, I had a shop install the new Mishimoto radiator while installing a new timing belt kit. I didn't really think to check there work, I popped the hood, saw shiny radiator, check..drove home. And the hose only survived until basically the first time that fan turned on. I would agree it was not an issue with a stock radiator. And now is not an issue with a top radiator hose in good condition. but when radiator grows, fans move, and the top hose swells...bad things can happen.
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Old 03-30-2013, 07:36 PM   #38
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Quote:
Originally Posted by Uncle Scotty View Post
i think people are mixing their metaphores, here

S T O C K.......fans+radiator = unpossible for the fans to come anywhere near the upper radiator hose.
unpossible
I agree here. Stock rad and stock hose should never have problems. There's so much clearance there even if your motor mounts are destroyed.


Quote:
Originally Posted by 340Duster View Post
I don't understand this thread the more I read it. Do people not properly check clearances when installing aftermarket parts?
In my case my motor mounts went poo poo. My radiator hose didn't get cut until months later. I already had trimmed the rad hose to fit with the newer rad but as the mounts got worn it put the hose closer and angled it a bit which allowed it get cut.
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Old 05-07-2013, 02:15 AM   #39
mikesh_21
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Default Me too...

So, I guess I need to research more and look into more when I do a project. Had I only read this thread, amongst a couple others I would have been able to be proactive rather than reactive to everything.

My wife keeps asking me, "so is this another really common thing that goes wrong with your car?" and I keep telling her, yes dear...lol
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Old 05-15-2015, 12:38 PM   #40
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Just to settle the debate, and since this is the 2nd time I've replaced an OEM upper radiator hose that was chewed up by the fan on a stock radiator (my wife's 2002 2.5 RS, and now my 2002 WRX), I'll just post a picture as proof that it's most definitely possible.



Over time the hose softens and starts to swell, eventually pushing it into the spinning fan blades. I was parked and idling on the side of the road when it happened, so I don't think it has much to do with the engine mounts and more about the age of the hose. I think this one had about 70k on it.
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Old 05-15-2015, 01:24 PM   #41
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Quote:
Originally Posted by Wade-O View Post
Just to settle the debate, and since this is the 2nd time I've replaced an OEM upper radiator hose that was chewed up by the fan on a stock radiator (my wife's 2002 2.5 RS, and now my 2002 WRX), I'll just post a picture as proof that it's most definitely possible.



Over time the hose softens and starts to swell, eventually pushing it into the spinning fan blades. I was parked and idling on the side of the road when it happened, so I don't think it has much to do with the engine mounts and more about the age of the hose. I think this one had about 70k on it.

IT IS not POSSIBLE

for the stock fans to hit the stock upper radiator hose


NOT POSSIBLE....unless something else is causing it.....

and the pic, above is useless
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Old 05-15-2015, 01:36 PM   #42
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Quote:
Originally Posted by Uncle Scotty View Post
IT IS not POSSIBLE

for the stock fans to hit the stock upper radiator hose


NOT POSSIBLE....unless something else is causing it.....

and the pic, above is useless
Well, you're wrong. Nothing modded on my wife's car when it happened, and she had around 60K total miles on the car. That was probably 10 years ago. This one just happened to me, and I had the radiator and hose replaced by the subaru dealership about 5 years ago, all stock. The picture is the elbow that faces the fan. There's nothing else it could have contacted. The car was not in motion when it happened. Stock radiator, stock fan, stock hose.

POSSIBLE!

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Old 05-15-2015, 02:16 PM   #43
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Quote:
Originally Posted by Uncle Scotty View Post
IT IS not POSSIBLE

for the stock fans to hit the stock upper radiator hose


NOT POSSIBLE....unless something else is causing it.....

and the pic, above is useless
I'm not sure why you're so adamant that it's not possible. The upper hose failed on my car as well, and from the pattern of wear it was obvious that it had been in contact intermittently with the fan and worn a hole: stock radiator, stock hose, and un-touched from the factory until I had to replace it.
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Old 05-17-2015, 02:32 PM   #44
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I have had to play around with my fans the last day or 2

the hose would have to 'move' a LONG WAY for this to happen

like at least several inches......id go out and look and measure it now but it is raining

this is quite amazing to me....that the hose can move THAT FAR to get into the fan without there being another causative issue

and id bet that the upper hose must have been replaced and the replacement hose was wrong or it was installed or re-installed improperly
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Old 05-17-2015, 05:10 PM   #45
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I just measured mine at a little over half an inch.
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Old 05-17-2015, 05:50 PM   #46
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I just measured...the one side...the AC fan side, is about 2 1/2" the other side is right at an inch.

now...that hose was replaced at the 105 mile service with a GATES 22886 hose I got off AMAZON that was supposed to be a direct fit hose.

but if your hose is swelling that much...you should have replaced it anyway and it should NEVER be an issue if it HAS been properly replaced

Last edited by Uncle Scotty; 05-17-2015 at 05:58 PM.
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Old 05-18-2015, 12:17 PM   #47
Wade-O
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Quote:
Originally Posted by Uncle Scotty View Post
I just measured...the one side...the AC fan side, is about 2 1/2" the other side is right at an inch.

now...that hose was replaced at the 105 mile service with a GATES 22886 hose I got off AMAZON that was supposed to be a direct fit hose.

but if your hose is swelling that much...you should have replaced it anyway and it should NEVER be an issue if it HAS been properly replaced
Was it hot or cold when you measured? Mine was hot, I had just gotten home from the store. The replacement hose that I took that measurement from is the Gates 22886 hose that you have. The hose that burst was an OEM hose with the arrows and the protective sleeve, and it was installed correctly. The radiator was NOT the same one that came with the car, apparently they revised the design and the new one, which is still OEM, has an extra cap near the overflow tank. I'm pretty sure they replaced the hoses at the same time, but I can dig up the invoice to be sure. That would put it at around 4-5 years old.
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Old 05-18-2015, 12:43 PM   #48
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I have had this hose break on my car twice. Both times it was the oem hose and oem radiator. From what I saw it was definitely the fan causing the hose and it's a simple fix. Cut the hose to the proper length and it won't touch the fan. I now have a Mishimoto radiator and it sits even closer now but I trimmed to hose to the proper length. I don't expect to have any issues. Crazy how the fan cause this problem.
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Old 05-18-2015, 01:05 PM   #49
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Quote:
Originally Posted by 08OBS View Post
I have had this hose break on my car twice. Both times it was the oem hose and oem radiator. From what I saw it was definitely the fan causing the hose and it's a simple fix. Cut the hose to the proper length and it won't touch the fan. I now have a Mishimoto radiator and it sits even closer now but I trimmed to hose to the proper length. I don't expect to have any issues. Crazy how the fan cause this problem.
Trimming the hose would pull it away from the fan a bit, but put it extremely close to the alternator pulley on the other side though. I don't think that would work well on mine at all.

I already ordered a Group-N pitch stop, and am probably going to replace the engine mounts just to reduce movement of the engine as much as possible. Things have definitely softened up over the years.
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Old 05-18-2015, 01:35 PM   #50
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They also make Group-N radiator mounts. Not necessary but made me think of those haha.
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