Vehicles using B4 engine list:

Engine B4 in the Ford Sierra XR 4x4 2.9 V6 (1988–1992) commonly faces ignition system wear, coolant leaks, and timing chain stretch. Diagnose ignition issues by checking spark plugs and coil condition; replace worn components to prevent misfires. Inspect coolant hoses and radiator for leaks; maintain coolant levels and flush regularly to avoid overheating. Timing chain stretch causes poor performance; listen for rattling noises and check timing marks. Replace the chain and tensioner if needed. Regular oil changes with quality oil prevent premature wear. Keep air filters clean to ensure optimal combustion and engine longevity.