How tight is too tight for hoses? - Defender Source
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  #1  
Old March 18th, 2012, 02:18 PM
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Alexandra
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How tight is too tight for hoses?

Have a leak that started yesterday from the hose that attaches to the thermostat elbow. New engine install and we are at about 7 hours of operation so I expect some things to need tightening etc.

In this situation everything appears to be seated properly and it's just a steady drip of fluid from the bottom of the hose. Tightened it up a bit and it has since stopped.

The question I have is how tight can I go with these hose clamps?
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  #2  
Old March 18th, 2012, 02:24 PM
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Mike Hammond
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I always make sure the casting is super clean as an opening shot, likewise the hose internal surface. Then as tight as needed as loose as you can get away with, without leaks.
The worst thing that'll happen is the hose will split around the clamping line if old.
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Old March 18th, 2012, 02:36 PM
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Alex I had the same leak but on the bottom radiator hose. I ended up using two clamps with the screw 180 degrees from each other and it stopped. It think there was a gap created where the hose clamp come together and pinched the hose. It could just be dumb luck YMMV.
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Old March 18th, 2012, 02:40 PM
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Just to make sure I'm not crazy- this is the thermostat and elbow correct? The first clamp is where the leak was coming from. What has me doubting this is that the fluid isn't green and doesn't smell like coolant. But it is coolant right??
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Old March 18th, 2012, 02:47 PM
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Should be coolant, might be blue though, mine is.
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Old March 18th, 2012, 02:50 PM
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Clear when I touched it and wiped it up with a rag- not blue or green.
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Old March 18th, 2012, 02:56 PM
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Is there antifreeze in the system?
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Old March 18th, 2012, 03:01 PM
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I have always replaced the factory hose clamps with AWAB hose clamps.
These are available at Defender and Jamestown Distributors.
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Old March 18th, 2012, 03:27 PM
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That particular location is prone to having a bad surface from the casting. It can help to smooth off the casting lines. I do find that all coolant lines need re-tightening after the first use.
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Old March 18th, 2012, 08:11 PM
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Also on the older engines as mentioned the castings may have some corrosion on them. I had one that wouldn't seal. I used a little bit of freeze plug sealer and it seemed to correct it. The freeze plug sealer stays flexable but made a good seal. Might have to cut the hose off in the future but all is good now.
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