This is a valve guide for the Hino SG1J and FG1J model trucks. A valve guide is a cylindrical piece of metal, pressed or integrally cast into the cylinder head, with the valve reciprocating inside it. Guides also serve to conduct heat from the combustion process out from the exhaust valve and into the cylinder head where it may be taken up by the cooling system.
Models: SG1J; FG1J
Year: 2000 To 2021