
Frost plug D = 45 mm for Volvo PV, Duett, Amazon 1962-70, 1800, 164, B18, B20, B30
PV 544, Duett, Amazon, 1800, 164
- Mounting position:
- Crank case
- Model year:
- 1961–1973
- Dimensions:
- Ø 45 mm (1.77 in)
- Engine:
- B18, B20, B30
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A leaking cylinder head gasket, white deposits in the coolant or dropping compression are among the classic reasons to lift the head on the B30A – the carburetor-fed straight-six that powers the 164. This category gathers wear parts and sealing components around the cylinder head, not a single head.

PV 544, Duett, Amazon, 1800, 164

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

PV 544, Duett, Amazon, 1800, 164


PV 544, Duett, Amazon, 164, 140

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

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

PV 444, PV 544, Amazon, 1800, 164

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

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

PV 444, PV 544, Duett, Amazon, 1800, 164
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The group includes cylinder head gaskets, studs and screws for tightening, nuts, fittings, freeze plugs, blanking plugs and other seals. During a cylinder head overhaul, checking the flatness of the head's mating surface and replacing the freeze plugs are typical steps you don't want to skip – if the old plugs stay in place they tend to start rusting and leaking shortly after reassembly.
Since the B30A is carburetor-fed, certain details differ from the fuel-injected B30E/B30F, so always check against the engine code before ordering.