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Unread 11-20-2015, 01:11 PM   #1
Leffnasty
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Heater core hoses leaking

According to the shop I dropped my jeep off at, my heater core hoses are leaking. They quoted me at just under $150. This smells fishy.

I won't be able to replace these for another two or three weeks, but it is a slow leak at the moment, been leaking for about two weeks.

What do y'all think? Too expensive? Can't wait that long? I know I could do it myself I just don't have the tools/space/time at school.

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Unread 11-20-2015, 01:30 PM   #2
tucsonzj
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considering parts and labor, probably a fair cost. is it difficult? no, but if you don't have the space or time to do it then what else are your options? I could easily see quoting an hour of labor and $50-60 worth of parts and fluids
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Unread 11-20-2015, 01:36 PM   #3
JStMarie
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It's quite literally less than a 10 minute job and can be done while in the take out line at your local McDonald's.

It will probably take longer for me to write... yup, there it is, done.

All kidding aside, go grab the hoses, a screwdriver, a pair of channel locks, and a 50/50 mix of coolant and do it in the parking lot of the place you just bought those things.

Good Luck.
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Unread 11-20-2015, 01:44 PM   #4
Leffnasty
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Great, I'll give them a call. Autozone parking lot will have a new stain once I look up some writeups.

Thanks y'all

Wow, just watched a 10 minute video while doing some homework at the same time. You weren't kidding, I could change those hoses in 5 minutes. $150 is insane. Once again thanks
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Unread 11-20-2015, 03:03 PM   #5
JStMarie
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If there is any incline where you do it park nose down, it will reduce the spillage. Do one hose at a time and it shouldn't spill very much. Top her off and then run her up to temp when you are done to make sure nothing is leaking before you leave.
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Unread 11-20-2015, 03:12 PM   #6
Jerry Bransford
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Know ahead of time that the two heater hoses have two different diameters. I forget what they are but you will probably be able to read the diameters on the hoses. They were still legible on mine the last time I noticed.
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Unread 11-20-2015, 03:25 PM   #7
JBTJ
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Quote:
Originally Posted by Jerry Bransford View Post
Know ahead of time that the two heater hoses have two different diameters. I forget what they are but you will probably be able to read the diameters on the hoses. They were still legible on mine the last time I noticed.
Just did mine a couple weeks back. 11/16th's and 5/8th's about $25 for the hose and about 10 minutes to swap them out.
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Unread 11-20-2015, 03:32 PM   #8
Jerry Bransford
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What I want to know is what genius engineer decided the two hoses should have a 1/16" diameter difference. I'm sure there's some hypothetical advantage having something to do with water velocity but sheesh.
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Unread 11-20-2015, 03:35 PM   #9
JBTJ
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Originally Posted by Jerry Bransford View Post
What I want to know is what genius engineer decided the two hoses should have a 1/16" diameter difference. I'm sure there's some hypothetical advantage having something to do with water velocity but sheesh.
Really
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Unread 11-20-2015, 03:48 PM   #10
Jerry Bransford
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Research discovered the engineer had some excess Cray supercomputer time available so he cranked up a computational fluid dynamics program and he discovered there was a slightly reduced coolant turbulence benefit to that 1/16" diameter difference that occurs when the tide is at low ebb and Jupiter is aligned with Mars.
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Unread 11-20-2015, 04:43 PM   #11
2jhanna
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Be carefull with the elbow nipple from the water pump. Very easy to rust out and can be fragile.

If it breaks, cracks, or twists, you want make it home.
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Unread 11-20-2015, 04:48 PM   #12
Leffnasty
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Thanks for the tips. Should I replace the clamps with worm drive hose clamps or leave the stock ones?
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Unread 11-20-2015, 05:36 PM   #13
Jerry Bransford
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Originally Posted by Leffnasty View Post
Should I replace the clamps with worm drive hose clamps or leave the stock ones?
Reuse the OE constant tension clamps which self-adjust their tension based on the temperature. They are not as likely to cause a leak as worm drive hose clamps are.
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Unread 11-20-2015, 05:54 PM   #14
ravenworks
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Quote:
Originally Posted by Jerry Bransford View Post
What I want to know is what genius engineer decided the two hoses should have a 1/16" diameter difference. I'm sure there's some hypothetical advantage having something to do with water velocity but sheesh.
Quote:
Originally Posted by Jerry Bransford View Post
Research discovered the engineer had some excess Cray supercomputer time available so he cranked up a computational fluid dynamics program and he discovered there was a slightly reduced coolant turbulence benefit to that 1/16" diameter difference that occurs when the tide is at low ebb and Jupiter is aligned with Mars.
That and the fact they didn't want the hoses (direction of flow)mixed up.
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Unread 11-20-2015, 09:54 PM   #15
chris142
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I'm not saying they can't be bad but a leaking heater hose is very rare on a TJ. I get jeeps in my shop with high mileages and the original hoses. The upper and lower hoses seem to fail more often than the heater hoses.
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