Hose clamp torque

[Bitsyncmaster]

I had this topic posted on the old forum. Since I am replacing my radiator I thought I would re-post it so new owners have the data.

You really need a lot of torque on large hoses to keep them reliably sealed. I exclusively use ABA stainless hose clamps. These are about the best you can buy constructed of all stainless (even the worm screw) and can take a lot of torque.

I did note that after being in use for some time the clamp and hose loose that initial torque. They still did not leak but I went over the hose clamps again after installing my new radiator.

For the small hose (less than 3/4") the recommended torque is 20 to 35 inch/lbs.
The larger hose the recommended torque is 35 to 45 inch/lbs.

I highly suggest you use a 1/4" drive torque wrench. That is why I am waiting for that guy selling the new torque wrench to offer a 1/4 drive unit to replace my cheap one I have now.

I also noted removing the clamp did not take much of a turn to have the hose leak. This was seen when I went to drain my system.

All my coolant hoses are silicone.

[jawn101]

I had this topic posted on the old forum. Since I am replacing my radiator I thought I would re-post it so new owners have the data.

You really need a lot of torque on large hoses to keep them reliably sealed. I exclusively use ABA stainless hose clamps. These are about the best you can buy constructed of all stainless (even the worm screw) and can take a lot of torque.

I did note that after being in use for some time the clamp and hose loose that initial torque. They still did not leak but I went over the hose clamps again after installing my new radiator.

For the small hose (less than 3/4") the recommended torque is 20 to 35 inch/lbs.
The larger hose the recommended torque is 35 to 45 inch/lbs.

I highly suggest you use a 1/4" drive torque wrench. That is why I am waiting for that guy selling the new torque wrench to offer a 1/4 drive unit to replace my cheap one I have now.

I also noted removing the clamp did not take much of a turn to have the hose leak. This was seen when I went to drain my system.

All my coolant hoses are silicone.

Don't you need special hose clamps for silicone hoses? I thought I remembered reading that somewhere.

[Bitsyncmaster]

Don't you need special hose clamps for silicone hoses? I thought I remembered reading that somewhere.

You don't want the type with notches cut into the band. Those will bit into the hose and prevent it from properly tightening.

The ABA ones do not have those cuts.