08-25-2019,
I spent right at $1600 for the head assembly when I went through my repair back when I started this thread
the Guts off my fuel pump was not my issues but one side of the head was . one plunger would not return like it calls for in the manual. as I would press it down and release it would not fully return back to the proper place and every time I pushed it down it ended up getting shorter and shorter meaning that a check valve for that plunger was not working correctly and as i could have got the parts one by one and changed them out in my situation it was not a option
I did attempt to loosen the torx nut for the check valve and yea that was not coming out and broke my bit and it wasn't a cheap tool so my opinion on that if one is doing these repairs and can afford I would only replace the head assembly
unless you have the time and place with a vice and other necessary tools to be able to do it right .
the Guts off my fuel pump was not my issues but one side of the head was . one plunger would not return like it calls for in the manual. as I would press it down and release it would not fully return back to the proper place and every time I pushed it down it ended up getting shorter and shorter meaning that a check valve for that plunger was not working correctly and as i could have got the parts one by one and changed them out in my situation it was not a option
I did attempt to loosen the torx nut for the check valve and yea that was not coming out and broke my bit and it wasn't a cheap tool so my opinion on that if one is doing these repairs and can afford I would only replace the head assembly
unless you have the time and place with a vice and other necessary tools to be able to do it right .