Upper radiator hose - JeepForum.com
 
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post #1 of 13 Old 08-01-2021, 08:39 PM Thread Starter
56BelAir
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Upper radiator hose

Seems like I replace my upper radiator hose every couple years. What would cause the upper hose to spit like this? Poor product or just too much pressure?

The radiator is about 4 years old and I replaced the thermostat at the same time. I do tow a trailer every now and then, perhaps that causes more heat.

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post #2 of 13 Old 08-01-2021, 09:12 PM
GmanWJ
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How are your motor mounts? If they are old and squished, they can allow the motor to move around and stress the hose.

I assume you changed the hose clamp because it was leaking and/or the hose popped off? Forum member Harry has a thread about that somewhere nearby ... motor mounts.


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post #3 of 13 Old 08-01-2021, 09:46 PM
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^^ Agree

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post #4 of 13 Old 08-02-2021, 04:37 AM
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I also would vote for poor material....

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post #5 of 13 Old 08-02-2021, 05:34 AM
HarryH3
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No matter how hot your cooling system gets, the radiator cap should release pressure into the overflow long before a hose splits. In 45 years of driving, I've never had a radiator hose split like that. As GmanWJ said, worn motor mounts will let the engine tug at that upper hose quite a bit. Mine was held on with spring clamps, so it just pulled off of the radiator nipple. Screw type hose clamps won't let go like that, so that could be the cause of your issue. Here's the thread that GmanWJ mentioned: https://www.jeepforum.com/forum/f310...-hose-4432877/
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post #6 of 13 Old 08-02-2021, 10:32 PM
jw11432
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Good answers here. What brand of hose are you getting? I generally try to stick with Gates on hoses and belts, always have had good luck with them. If it's a bargain brand, that could certainly be part of the issue. And the motor mount theory, flexing things about certainly holds credibility. Looks like it's resting against the shroud.

Upon closer inspection, it looks like the hose is resting right up against the shroud. With motor mount flex, that could feasibly be accelerating wear. Am I seeing that right?

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post #7 of 13 Old 08-25-2021, 02:44 PM Thread Starter
56BelAir
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new radiator hose

I installed my new upper radiator hose. You can see where it is rubbing against the radiator shroud when it expands.

I know someone mentioned possible motor mount that is broken.When I see the engine running with the hood open at high RPM, it seems like the engine is stable.

I'm wondering if I should trim some of that radiator shroud away from the hose where it comes up close to it.

PJ
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post #8 of 13 Old 08-26-2021, 04:36 PM
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Quote:
Originally Posted by 56BelAir View Post
I installed my new upper radiator hose. You can see where it is rubbing against the radiator shroud when it expands.

I know someone mentioned possible motor mount that is broken.When I see the engine running with the hood open at high RPM, it seems like the engine is stable.

I'm wondering if I should trim some of that radiator shroud away from the hose where it comes up close to it.

PJ
Yes, trim the plastic shroud.
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post #9 of 13 Old 08-26-2021, 05:57 PM
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Motor mount issues won't show up when the motor running at a constant rpm. Have someone press the gas pedal down quickly a few times while your watching the engine. If it rocks back and forth every time then you might want to inspect the mounts.

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post #10 of 13 Old 08-28-2021, 02:38 PM
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Maybe try a silicone hose set https://www.ebay.com/itm/312066939620
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post #11 of 13 Old 08-30-2021, 05:06 PM
03WJinAZ
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Quote:
Originally Posted by JHenke View Post
Yes, trim the plastic shroud.

I bet the radiator is slightly smaller than the OEM one. Or its just not installed right. Trimming the shroud seems like the easiest solution.


I have used Gates hoses with no problems for years. I would say they are a better manufacturer
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post #12 of 13 Old 08-30-2021, 05:48 PM
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Quote:
When I see the engine running with the hood open at high RPM, it seems like the engine is stable.
Of course it is. There's no load on the engine!

Put it in drive, hold the brakes, and stand on the gas while it's in gear.
Repeat in reverse.

If the motor rocks over, welp, there you go!

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post #13 of 13 Old 08-30-2021, 11:56 PM
Delta0
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Quote:
Originally Posted by jw11432 View Post
Good answers here. What brand of hose are you getting? I generally try to stick with Gates on hoses and belts, always have had good luck with them. If it's a bargain brand, that could certainly be part of the issue. And the motor mount theory, flexing things about certainly holds credibility. Looks like it's resting against the shroud.

Upon closer inspection, it looks like the hose is resting right up against the shroud. With motor mount flex, that could feasibly be accelerating wear. Am I seeing that right?
I reckon Gates make the best hoses.

As well as what others have said.

When you fit a hose, use a little grease of the spigot so the hose goes on easily.
Make sure the hose lies straight / unstressed.
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