1. Patch A Radiator Hose Steam hissing from a ruptured radiator hose? Here’s a relatively easy, temporary fix with duct tape. Wait for the engine to cool off. Open the hood and locate the source of the steam—i.e., the rupture (A). Clean and dry the area around the fissure; the tape won’t stick as well on a damp, dirty surface. Wrap 2 to 3 in. of duct tape around the hose over the hole; press fir