Hose leaks and hose clamps

[BB marine]

After having a turbo hose failure and not being able to finalize a true "root cause analysis" of what caused the failure. I decided to upgrade the hose clamps that clamp the silicone hose to the turbo and aftercooler. The biggest issue with this installation is clearance. There is not a lot of room for a larger heavy duty clamp. After ordering several different style clamps I decided on the constant torque clamp. It is designed to maintain constant clamping force during temperature changes. It has a 9/16" wide clamping band and uses belleville spring washers to maintain a constant clamping force. When tightening the clamp a torque spec is given to apply the proper clamping force and this force is maintained requiring no tightening in the future. I used these clamps in place of the factory clamps at the turbo location and plan on using them at the hot water heater and bus heater location. Hose clamp leaks at these locations seem to be troublesome and hard to get to for periodic inspections.

 

[Salty7]

In my experience, constant torque clamps are great clamps but they need to be checked at least once a year because vibration and heat/cool cycling does affect them. I just go over them and click them all off with a torque wrench which just takes a couple of minutes. My memory says they are all 44 inch pounds cold, do some of them have a different torque requirement?

 

[gwishon]

Have always used T-bolt constant tension clamps like those below on my turbocharged car engines. You can find them on Amazon. They conform to SAE standards and compensate for temp/pressure fluctuations.

http://www.hps-siliconehoses.com/hps-st ... lamps.html


Gordon

 

[BB marine]

Have always used T-bolt constant tension clamps like those below on my turbocharged car engines. You can find them on Amazon. They conform to SAE standards and compensate for temp/pressure fluctuations.

http://www.hps-siliconehoses.com/hps-st ... lamps.html


Gordon

T-bolt would not fit in this application or smaller hose clamp applications on the boat. I agree awesome clamp for turbo and exhaust applications.

My memory says they are all 44 inch pounds cold, do some of them have a different torque requirement?

45in lbs to 70 in lbs for the aero clamp, I torqued to 45 in lbs. I was going to tighten more but 45 in seemed tight enough.

 

[SJI Sailor]

Brian, which clamp did you ultimately prefer?

 

[BB marine]

For my application ( turbo hose ) I preferred and used the Breeze Constant Torque Clamps. The clamps are an upgrade to the OEM Volvo clamps. The clamps can be used on silicone hoses without damaging the silicone material. The hose clamp design is best suited for use when there is a constant temperature differential. ( hot-cold ) Radiator hoses, heater hoses, and turbo hoses. The photos I posted in the previous post are Breeze Constant Torque clamps installed in my boat. Turbo to aftercooler connection.

 

[SJI Sailor]

Thanks, I will check them out. I need to redo several connections where dealer used single clamps (fresh water hear conversion) and am glad to know about these.