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My experience has been that new hoses installed with worm drive clamps always require retightning after a few heat cycles. Any tips on clamps or sealants for those hoses you can`t reach after reassembly ?

Thanks
 

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I prefer to NOT use gear clamps.

I stick with the original band style of clamp that has a square nut and machine screw that clamps the band tight. Unlike gear clamps, they do not tear into the outer cover of the hose and chew it all up.
 

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Here's a link to McMaster Carr and some additional options. One inconvenience of the bolt type clamps is that they have to be closely matched to the hose size whereas the screw type will fit a fairly wide range of sizes. It's best to have the correct clamp but I have a good supply of screw type on hand for a myriad of emergency repairs.
 

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Bart seems to have missed adding the link to his post so I will provide one that I think he was going to use. You have to click on the top icon of the page this link takes you to in order to make sense out of my words below.

http://www.mcmaster.com/#hose-and-tube-clamps/=d0224c

The first type is the gear clamp or worm-screw clamp that most people use because it fits many sizes of hose/tubing. These don't thrill me too much because the worm is exposed to the item it is clamping and the worm will cut into that material.

The second one shown is the "bolt" style of clamp. This is my choice because as McMaster says, they are much stronger than the gear/worm type... which will deform and strip out if you over-tighten them.

The third choice for ME is the "spring" clamp. I like these for small diameter tubing such as fuel lines. There are two types of spring clamps. One is the round rod style shown in the McMaster catalogue and the other is the flat band spring clamp. Both can be a bit of a PITA to use until you get the knack of working with them. The round rod spring clamps were used on rad hoses and heater hoses on cars for many years during the fifties, sixties and seventies until they went to the "twin ring". I still have the special pliers in my Cornwell tool chest that I bought back when I was a teenager and working in Service Stations that was essential for the larger round rod spring clamps.

Gear/worm clamps on small diameter tubing/hoses has never been very successful for me. And yes...... just like Barton, I keep a large selection of the gear/worm clamps around because they can do things for you that none of the other clamp styles can.
 
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