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Valve mechanism Volvo B204

Blue smoke on acceleration after engine braking or rising oil consumption can point to worn valve guides and dry valve stem seals – one of the most common reasons to open the valve side on a B204 engine in the Volvo 740, 760 and 780. This category gathers the parts belonging to the cylinder head's valve mechanism, so an overhaul can be done with the right components together.

The group includes valve guides and oil seals (valve stem seals) that should be checked in case of leakage, plus valve spring washers, studs, nuts, sleeves and washers belonging to mounting and preload. During disassembly it is a good check point to measure the play in the guides and inspect the seals, since hardened rubber is often the cause of oil ingress. Because the design can differ, it is important to verify the parts against engine code and model year before installation.

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