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Old 01-26-2018, 07:46 AM   #13
Ski in NC
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City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 5,393
Constant torque has a stack of belleville springs under the screw head. When you tighten the screw, the springs compress. Then as hose extrudes over time, the clamp still has a good bite. Well worth it on engines where hoses hold considerable pressure and have wide swings in temp.

Seen several cases where someone replaced the hoses on their engine then a week later a hose blew off. Were using standard clamps, not constant torque.

If you replace hoses, a week later go down and snug EVERY clamp. Even if using constant torque.
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