Vehicles using AJ-6 engine list:

Engine AJ-6, used in Jaguar XJ6 and XJS models (1986–1994), commonly faces head gasket failures and timing chain wear. Diagnose head gasket issues by checking for coolant leaks, overheating, or white smoke from the exhaust. Timing chain noise or poor engine performance signals chain wear. Prevent problems with regular coolant changes and timely oil replacements using high-quality fluids. Inspect timing chains and tensioners periodically, replacing them if noisy or loose. Address head gasket failure promptly to avoid engine damage. Maintaining proper engine temperature and lubrication extends AJ-6 longevity, ensuring reliable performance in these classic Jaguars.