Well that was not to bad, fair bit of dismantling of surrounding bits but it all came off okay. Old O ring was flat and brittle. New viton one went in fine so hopefully the leak is stopped.
It does feel quite sketchy though with that pump head wiggling about half out/in - I felt like I was mm away from disaster.
some photos
Start like this, most of that needs to come off
until it looks like this,‘it’s much easier to get the stop solenoid out of you remove the pump bracket from the block, you also need to remove the oil filter mount to get to the last torx fixing on the pump.
You absolutely need to make sure the pump is ‘on cam’ - I did this with a drill bit inserted in the timing port - then I turned the engine over with a socket on the crank bolt - you can watch the drill bit come out - when it’s out as far as it can then the pump is on cam and the spring pressure will stop the shim inside falling out, which would be bad.
Take the oil filter housing off, if you are careful then no oil will spill.
The I took out two bolts, on the diagonal. And wrapped the pump head in duct tape. Then I careful backed out the other two bolts - not all the way - just enough until I could see the O ring. This felt sketchy tbh.
This is actually a photo of the new O ring as I forgot to take a photo of the old one. Use a pick to remove the old o ring, mine came out in pieces and was flat and brittle.
Then lube everything up and stretch the new viton O ring (60mm x2.5mm) over the pump head and seat it into the groove - you have to do some switching around of the bolts to get it all in - there must be 2 bolts in at all time on the diagonal or the pump head will spill it’s contents and you will need to have someone rebuild the pump….
Before I dropped the O ring in I sprayed everything with brake cleaner to get any crud out.
Then carefully tighten down the pump head being absolutely attentive to the O ring to make sure it doesn’t get pinched and goes in smoothly. Then it’s just a case of reattaching everything that was taken off. Make sure everything that’s fuel system connections is spotless as you do not want contamination in the pump or injectors.
I haven’t started it yet, so will do that tomorrow and report back!