This LRO reader emailed LRO.email@example.com seeking help with a screeching whine from his Discovery 2.
When I start my ’04 Disco 2 Td5 there’s a high-pitched screech that usually stops after a few seconds, although it did once last for about 30 seconds. I’ve had idler, fan-belt tensioner and fan belt changed, but to no avail. It appears to come from the right-hand side of the engine (facing engine from front of vehicle). Can you help?
Bryan James, Tredegar, Gwent
There are a few areas for you to check. If ACE (Active Cornering Enhancement) is fitted, check that the fluid level is correct – if it’s low, the ACE pump will make a noise. Likewise, the power steering pump could be noisy if it’s low on fluid or close to failure. And the alternator’s not beyond a bit of screeching.
You could try to determine which of these (if any) is noisy by removing the drive belt and spinning each pulley in turn to listen for noise. Ensure there’s no contamination of belts by leaking fluids.
When topping up the various reservoirs take extra care to ensure the correct fluids are being used: wrong fluids can cause major damage. A common source of screeching in Discovery Td5s is from the clutch, and this is most evident from initial start-up. The usual culprit is a worn spigot bush.
This workshop advice appeared in the December 2015 issue of LRO. Back issues are available to download on digital devices here.