Thats a good bit of info, looks like QH are using a cheap cast part.

Another pump that uses the same design as the blueprint one is "First line", FWP1642 is its part number.
Indeed Tone, it has taken us months to totally investigate this, good info on the First line part number too :thumbsup:

It should be noted we have only heard of one or two cars even seeing this issue, but we needed to get to the bottom of it regardless.