This LRO reader emailed LRO.email@example.com seeking a solution for groaning steering from his two Defenders.
Can you tell me the cause and fix for the steering groan on my 2007 Td5 110 SW? When turning left it’s as if it draws air, causing the system to vibrate - which is when you get the groaning noise. But it only does it while stationary or moving very slowly.
My 300Tdi 90 also has the same noise, only not as bad and it does stop the more you use it, whereas on the 110 Td5 it always does it. I tried changing the oil, which made no difference. There don’t seem to be any leaks anywhere and all pipework appears to be in good order. I have noticed that there is a filter in the small reservoir, which also seems spotless.
James Wigham, Carlisle, Cumbria
The noise does sound like air in the system, so to start with I would try bleeding it again. There are two ways of bleeding these PAS systems; the most common one is to just turn the steering from lock to lock a few times with the engine running and the job is done.
This works 99 per cent of the time but, if it doesn’t, there’s a bleed nipple on the steering box that needs to be opened with the engine running. Then, put a pipe from the bleed nipple to a container to catch any oil.
If bleeding doesn’t sort the problem, you’ll most probably need a new steering pump.
This workshop advice appeared in the March 2015 issue of LRO. Back issues are available to download on digital devices here.