Oetiker patented "stepless" spring clamps eliminate thermal cycling leaks by
maintaining a constant clamping tension across coolant temperature swings,
and ensure 360 clamping with the "tongue-in-groove" design. This clamp
design also virtually eliminates hose damage caused by over-tightening
(often necessary with conventional clamps to control cold seepage).

The larger hoses (on a 94 NA Diesel) require 55, 60, and 65mm clamps cost
about $3.00 each. "Stepless" spring clamps are limited in their adjustment
range so careful selection is required.

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Thanks for the above info that was submitted by Quinn, Keri R  Oct 12, 2000