Timing chain replacement

Service Description

Larger engines tend to use a chain to drive the valve train and maintain synchronisation with the crankshaft and pistons. Each link contains a small roller over the connecting pin, allowing the chain to pass smoothly round each sprocket. Over time and use these links and rollers wear, introducing stretch into the chain, and producing slack which in turn increases wear deteriorating sprocket teeth and deteriorating timing accuracy. Chains are routed through guides to maintain the correct position in the timing case while they move round the engine. If these guides deteriorate or even crack, it may allow the chain to move outside of the correct position and damage engine components around it, allow timing to change by jumping a sprocket tooth or introducing debris that could clog the oil strainer and prevent sufficient lubrication. Timing chain tensioners exert force against a guide or rail to tension the chain and prevent it jumping sprocket teeth. Whether spring loaded or hydraulically adjusted via engine oil pressure, their function remains the same and they must reliably maintain the chain tension throughout the life of the chain. Chains, guides and tensioners are all exceptionally reliable devices, however if your chain driven engine has developed a ticking or chatter, this could be a sign the tensioner and/or chain are failing. Most chains and tensioners should be replaced around 90-120,000 however many have been known to last much longer. As damaged, failing or poorly manufactured timing chains and guides can introduce significant and extremely harmful debris, our engineers only use timing components that match or exceed the absolute specifications set out by the manufacturer of your vehicle's engine. If you have an undiagnosed sound from your engine or know its timing chain is due for renewal, allow our engineers to take a look at your convenience. Book an appointment today.