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New OEM Genuine Nissan valve seals. These seals will fit Datsun 510, 240Z, 260Z, 280Z, and 280ZX, years 1970-1983. Valve seals can be replaced with the cylinder head still on the engine. If your Datsun Z engine is using oil but does not have any leaks and does not smoke out the tail pipe, then your valve seals might be worn. Worn valve seals can leak oil into the cylinder slowly and over time reduce the oil level.
These will also fit 4-cylinder "L" series engines.
