The chain sub-assemblies and No. 2 chain sub-assemblies are roller chains with a pitch of 9.525 mm (0.375 in.).
A chain tensioner assembly is provided for each chain sub-assembly and No. 2 chain sub-assembly on each bank.
The No. 1, No. 2 and No. 3 chain tensioner assemblies use a spring and oil pressure to maintain proper chain tension at all times. The tensioners suppress noise generated by the timing chains.
The No. 1 chain tensioner assembly is a ratchet type tensioner with a non-return mechanism. Furthermore, the chain tensioner gasket is provided with an oil pocket. The pocket reduces the time it takes for oil pressure to build up in the No. 1 chain tensioner assembly when the engine is started. This prevents the timing chain from flapping and reduces noise.
|*1||No. 2 Chain Tensioner Assembly||*2||Ball|
|*5||Main Spring||*6||No. 1 Chain Tensioner Assembly (LH)|
|*7||Chain Tensioner Gasket||*8||Oil Pocket|
|*9||No. 2 Chain Sub-assembly (RH)||*10||No. 1 Chain Tensioner Assembly (RH)|
|*11||Chain Sub-assembly (RH)||*12||Chain Sub-assembly (LH)|
|*13||No. 2 Chain Sub-assembly (LH)||*14||No. 3 Chain Tensioner Assembly|