Exhaust gas recirc Volvo 140 (B20B MRA)

A rough idle, a light knock, or an EGR valve that sticks can point to a worn recirculation system on the B20B in MRA configuration. This category gathers the parts that control and seal the recirculation of exhaust gases, where leaking hoses and dry copper washers are common check points when the joints start to sweat or hiss.