The four basic production methods for aluminum heat exchangers are discussed: furnace brazing with flux in dry air, vacuum brazing, seaming, adhesive joining. Adhesive joining is discussed in detail and a description is given of systematic tests carried out on adhesive joined exchangers: shear, tightness, and pulsating pressure tests. Favorable tests results show that adhesive joined exchangers have several advantages: lower joining temperature, no necessity for special or clad sheet, different alloys can be joined.