Phew. Pulled my bank 2 board, cleaned it up and re-soldered and all is well. So far anyway.
I promised a few pics but I think with my experience, any DIY write up is not going to be any better than the existing ones. Instead here are some pics and a couple of gotchas I ran into.
Before you start the job make sure you have plenty of gloves, towels and access to a soldering iron or someone who can solder. Buy or borrow a multimeter too. You will at least want to test and I say only test impedance (3.8 - 4.0 Ohms on all mine) as it would be very easy to overcook the board with a home-made power supply.
Take photos at every stage. I had to interrupt my work to do something else and when I went back to put everything back together I could not remember the orientation of the gasket. I was able to look at my photos to see how it was before.
The cable supplying power the solenoid board was a pain to take off in my car. It connects to the harness right under the front of the plenum and there is a clip holding it there. I broke mine of course.
On bank 2, it is difficult to remove the cable and board from the car as it gets caught. Get this taken care of before you pull the solenoids out. Afterward when you have oil everywhere it's a lot harder.
Be very careful wiggling and twisting solenoids to take them out. You can apply pretty firm pressure pulling outward though. the solenoid are not solidly attached to the board, there's only a grommet holding them in there. But the small yellow and black wires on the board are very delicately soldered on. Only one of mine was trouble to take out but boy did it put up a fight.
This is what my board looked like coming out. This one is a bit blurry as I was trying to deal with the oil.
I used brake cleaner, a toothbrush and a razor blade to clean. I pulled the old o-rings and the filters off with a needle nose pliers. The filter looked ok at a cursory glance but fell apart as soon as I touched them. Well worth getting these out of there. Oil will seep out of the holes as you clean and get all over board, especially around those grommets. There was a lot of crud there. Take your time and do it right and remember to handle everything carefully.
All clean with new o-rings installed and oiled up. Ready to go back in the car.
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I soldered it back to the top as best I could. Seems pretty solid. Looped a tiny piece of electrical tape round the wire and fresh solder to hold it to the solenoid. Wrote my favorite bad word on the tape. Didn't feel like taking a pic at that time.
Based on my experience with the boards over the last couple of days I recommend taking the time to clean up the joints and re-solder where you feel necessary. They were not that special to begin with and heat + time do not treat them well.
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