Exhaust gas recirc Volvo 240 (B21A) (-1978)

A sluggish or uneven idle and a sharp exhaust smell under the hood can point to leaking connections in the exhaust gas recirculation – a common result as pipes and hose age on an early 240 with B21A. This category gathers the parts that seal and route the recirculation in place: pipe and hose, T-nipple and nipple, coupling and hex nuts, plus copper washers for the seals, along with EGR-related parts. When the threads are loosened, the copper washers are a typical checkpoint – they flatten out and should be replaced at every removal so the seal holds. Note that the B21A in its pre-1978 version determines the fit, so check the engine code and model year before you order.