
Cooling system Volvo PV/Duett (B4B) (1947-56)
Cracking radiator hoses, a thermostat stuck in the closed position and leaking gaskets are among the first things you encounter when a 444 with the 40-horsepower B4B motor (1414cc) is brought back into service. Keeping the cooling system at the correct working temperature is absolutely critical for a motor that has run for decades, and small parts decide whether it stays tight or not.
- Hose clamp 22-32 mm universal
- Screw UNC 5/16-18x1" (25 mm) for Volvo PV, Duett, Amazon, 140, 164, 1800, 240, 260
- Copper washer 9.5x13.7x0.9 mm for Volvo PV444, Duett, Amazon
- Nut M6-1.0x4.8 for Volvo PV, Duett, Amazon, 140, 164, 1800, 240, 260 and others
- Heating system clip for Volvo PV and others
- Screw M8-1.25x16 for Volvo B4B, B16
- Screw cross recess round head pointed end
- Screw M6-1x20
- Lock washer 8.4
- Spring washer M8 & 5/16" 8.2x14.2x2 mm for Volvo PV444, PV544, Duett, Amazon
- Spring washer M5 5.1x8.7x1.2 mm for Volvo Amazon Wagon, 1800
- Washer 5x12x1 for Volvo Amazon
- Washer 6x16
All products in category: Cooling system Volvo PV/Duett (B4B) (1947-56)


Screw UNC 5/16-18x1" (25 mm) for Volvo PV, Duett, Amazon, 140, 164, 1800, 240, 260
PV 444, Duett, PV 544, Amazon, 1800, 164
- Model year:
- 1957–1974
- Thread:
- 5/16"-18 UNC
- Engine:
- B16, B18, B20
- System:
- ENV

Copper washer 9.5x13.7x0.9 mm for Volvo PV444, Duett, Amazon
PV 444, Duett, PV 544, Amazon, 1800, 164
- Model year:
- 1955–1974
- Engine:
- B14A, B16, B18, B20

Nut M6-1.0x4.8 for Volvo PV, Duett, Amazon, 140, 164, 1800, 240, 260 and others
PV 444, Duett, PV 544, Amazon, 1800, 164, 780, S90, S70, C70
- Model year:
- 1957–1974
- Thread:
- M6x1
- Engine:
- B16, B18, B20
- Surface:
- Zinc-plated

Heating system clip for Volvo PV and others
Duett
- Quantity per car:
- 8

Screw M8-1.25x16 for Volvo B4B, B16
PV 444, Duett, PV 544, Amazon, 240
- Model year:
- 1957–1962
- Thread:
- M8
- Engine:
- B16, B18, B20A, B27E, B27F

Screw cross recess round head pointed end
899
- Type:
- Binding head, Internal Torx

Screw M6-1x20
PV 444, Duett, PV 544, Amazon, 164, 780, S90, S70, C70
- Thread:
- M6x1
- System:
- ZF

Lock washer 8.4
PV 444, Duett, PV 544, Amazon, 1800, 164, 780, S90, S70, C70

Spring washer M8 & 5/16" 8.2x14.2x2 mm for Volvo PV444, PV544, Duett, Amazon
PV 444, Duett, PV 544, Amazon, 1800, 164, 780, S90
- Model year:
- 1957–1974
- Engine:
- B16, B18, B20

Spring washer M5 5.1x8.7x1.2 mm for Volvo Amazon Wagon, 1800
PV 444, Duett, PV 544, Amazon, 1800, 164, 780
- Model year:
- 1961–1974
- Thread:
- M5
- Engine:
- B18, B20

Washer 5x12x1 for Volvo Amazon
PV 444, Duett, PV 544, Amazon, 1800, 164, S90
- Model year:
- 1957–1974
- Dimensions:
- 5 × 12 × 1 mm
- Engine:
- B16, B18, B20
- Interior code:
- 667, 668, 669, 670-824, 671-825, 672-826, 673-827, 674-828, 675-829, 684-891, 689, 690, 691, 692, 700

Washer 6x16
PV 444, PV 544, Duett, Amazon, 1800, 164, S90
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This group includes thermostats, radiator hoses and hose clamps that together control the flow, plus gaskets, screw, washer and spring washer to seal and fasten connections correctly. Here you'll also find decals belonging to the engine bay on the early 544 models.
When overhauling the cooling system it is wise to replace hoses and clamps at the same time, check the thermostat's opening temperature and renew the gaskets in the same go – old rubber hoses often crack from the inside and aren't visible until they let go.