TOMAHAWK TPE25: Pump Quick Fix Guide 1 Start the engine and keep it in idle. 2 Using a 10mm socket wrench, loosen the 4 bolts on the right & left sides of the pump. 3 Loosen the left screw on the left side. 4 Loosen the right screw on the left side. 5 Loosen the left screw on the right side. Loosen the right screw on the right side. Look for water to begin flowing through the tubes.