Non-return valve for Volvo 240
164, 240, 260
- Model year:
- 1968–1982
- Engine:
- B20F, B27F, B30F
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Brittle rubber in the hoses and a non-return valve that starts letting hot exhaust gases pass back the wrong way are typical checkpoints when the air injection on a 240 with B21A/E is being inspected. The system feeds extra air toward the exhaust side for cleaner combustion, and when a hose or nipple leaks it is often noticed as changed running and early rust attacks where the hot air strikes back.

164, 240, 260

Amazon, 1800, 140, 164, 240, 260, 740, 780, 760, V90, 960, 940, S90

240, 260, 740, 760, V90, 960, 940, S90, 850, V70, XC70, S70, C70

240, 260, 740, 780, 760, V90, 960, S90, 940

240, 260, 740, 760, 940, 960

240, 260, 740, 760, V90, 960, S90, 940
240, 740, 760, 340, 360

PV 444, PV 544, Amazon, 1800, 140, 164, 240, 260

PV 444, Duett, PV 544, Amazon, 780, S90, S70, C70

PV 444, PV 544, Duett, Amazon, 1800, 164

PV 444, PV 544, Duett, Amazon, 1800, 164
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The group includes non-return valves, hoses, t-nipples and nipples plus smaller mounting parts such as screw, nut, washer and bushing. The parts are gathered for the Volvo 240 with the four-cylinder B21A/E – check the engine code and version against your car, since routing and connections differ between model years and intake setups.