Jaguar Engine – Broken Timing Chains, Bent Valves

Problem This is an excellent example of what you do not want to see happen to your Jaguar, you'll note the broken secondary timing chain, and consequently the damaged engine valves. On the early XK8 and XJ8 Jaguar vehicles, there is a known flaw in the upper timing chain tensioner. What happens is that the chain tensioner fails, causing the chain to slip or completely break like you see here, causing damage to the valves. Symptoms A noticeable engine noise while idling or during a cold start can indicate a timing chain tensioner problem. The engine noise may also be accompanied by [...]