03 pump - is it the block ot the front cover that is bogus?

Can anyone confirm if it is the pump or the block that was out of alignment on 2003 discovery's. To be honest, the LR TSB suggests it's the block - but is this becuase if an engine was in the service centre because the pump 'failed' it'd likely have damaged many other parts like cam, rockers, mains, etc...

Here is the words on the TSB:
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Situation:​

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Oil pump failures on 2003 Discovery Series II vehicles may be the result of a manufacturing error. Locating dowel pins may be slightly misaligned permitting assembly of the oil pump to the engine block, but placing stress on the pump housing which can ultimately lead to leakage or failure.​

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Resolution:​

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Whenever an oil pump failure is encountered on vehicles within the above VIN range the ​

NVRover said:

If I remember correctly the block is where the misalignment occured. The front covers and oil pumps did not change with the then new 4.6 block.

Click to expand...

I thought the block was the 'same' for the 4.6 as the 4.0 - or is this a 'theoretical same'?

The pump seemed to be one part number from '99 to '02 and another part number for '03 to '04... I don't know what was different between the two though, but it makes me think the 'newly introduced' pump might be the one that sucked?

Well, reason I'm asking is that I had good oil pressure prior to pulling my engine down (yes, I'm in the VIN range) and had thought ahead and also purchased a replacement pump rotor.

On removing the side plate from the pump gerotor, I was greeted with an outer rotor in four nice pieces. It has clearly been broken for some time - but worked just fine (I will post my oil pressure readings shortly). I was not expecting to find this - just a scuffed up gerotor set.

So, I'm in a quandary - Is it JUST the pump assy, or is it the block that is mis-aligned. I'm going to get a DTI on the crank snout and check the run-out of the oil-seal bore, but I don't know if this'll tell me the answer as the oil-seal bore would have been machined from the front, not the back as per the gerotor pocket. Sadly there is no witness machinining or similar to pick up from on the rear face - which is the area that is dubious...

Our '03 has got 108K miles on it btw.


EDIT - see this post:
http://www.discoweb.org/forums/showthread.php?t=55265