
Screw UNC 1/4-20x1/2" (13 mm) for Volvo PV, Duett, Amazon, 140, 164, 1800, 240, 260
PV 444, PV 544, Duett, Amazon, 1800, 164
- Model year:
- 1957–1974
- Thread:
- 1/4"-20 UNC
- Engine:
- B16, B18, B20
- Type:
- External hexagon
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A stiff gas pedal, slop in the linkage or a gaswire that snags are classic wear points on the fuel-injected B20E/F cars from 1973-74. When ball joints and bushings wear out you get dead play before the throttle responds, which is clearly noticeable during gentle acceleration and at idle.


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

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

PV 444, Duett, PV 544, Amazon, 1800, 164, 780, S90, S70, C70

Amazon, 1800, 164, 780, S90

PV 444, PV 544, Amazon, 1800, 164, 780, S90, S70, C70
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This category gathers the parts of the throttle linkage for these model years. The group includes the gaswire, ball joints, bushings, nuts, washers, screw, coupling and knob – components that together keep the pedal movement precise and free of play.
During a rebuild it is worth checking the ball joints for wear and that the gaswire runs cleanly in its sleeve, while also testing the return action so the throttle closes fully when the pedal is released.