Help please! I've just changed the oil filter on my 2008 LT diesel and on replacing the oil filter drain plug I found it impossible to tighten it - just kept going round and round as if the thread has stripped except the thread on the bolt is 100%; I'd found it difficult to undo in the first place so it's possible the thread in the housing is bu$$ered. I've put it back in with Loctite but it's weeping oil when the engine runs. Have I got to get a new oil filter housing unit?? Is it easy to replace because it looks like a swine of a job to do. Any ideas gratefully received.