Parts for your 1984 Suzuki Swift-Oil cap

1984 Suzuki Swift Oil Cap — what it does, and how to look after it

The 1984 Suzuki Swift is fitted with a conventional oil filler cap. This isn’t guesswork: the Suzuki factory service documentation for the SA310/SA413 (early Cultus/Swift) platform and the Suzuki Electronic Parts Catalogue for G10/G13 engines both list an oil filler cap on the rocker/valve cover. Any four‑stroke Swift from this era needs a sealing cap to allow oil top‑ups and to keep the lubrication system closed and tidy.

On a 1984 Swift, the oil cap’s day job is simple but critical. It seals the top of the engine so dust and moisture can’t wander into the oil galleries, and it stops warm oil mist splashing out under the bonnet. Just as importantly, it helps maintain proper crankcase ventilation behaviour. Even on a carby Swift, the PCV system expects the rocker cover to be sealed