My engine has been removed for the purpose of addressing a lower timing chain rattle and oil leaks. After removal of the timing cover it was revealed that the hydraulic timing chain tensioner had never had the spring tension released, ie it was still in the locked position. I bought the car with 10,000 miles on a rebuilt engine (receipt) and I’ve subsequently put another 15,000 on it over 12 years. My engine builder (45 years Jaguar experience) was surprised it wasn’t noisier. Chains/sprockets are serviceable so a new (quality) tensioner and chain guides will be fitted along with a new water pump bearing/seal, crankshaft damper, machined flywheel and new clutch. Tappet clearances have also been checked. Here’s hoping for a quiet, oil-tight engine
