OK here's how to do this thang:
1. Put in gear
2. Pull ebrake
3. Disconnect batter (just for safety)
4. Remove 2 hex screws from top of assembly then remove the cover.
5. Unplug Camshaft Sensor harness. The trick is to pull the little red thing. It locks the plugs together.
6. Make note of the positioning of the "wheel" inside the assembly. Take a picture if you have to (I did). Just make absolutely sure you know where it was positioned before you take it out. This was my pic:
7. Remove that little SOB bolt thats up under the assembly. Its hidden under on the right side viewed from the passenger side of the vehicle. In other words, towards the front of the engine. Once the bolt comes out, drop the bolt and the bracket down onto the engine mount
. Fish them out with a telescopic magnet!
8. Remove the entire assembly by pulling it up and out. When it comes out the shaft will turn. And this is where the problem lies. The shaft serves 2 purposes. 1. gives camshaft orientation to the sensor though the grooves about midway down the shaft. 2. turns your oil pump with the flathead shaped end of the shaft. When you pull it out, the shaft will rotate (because the camshaft input itself is stationary, circled in green below). When it does this, it will rotate the oil pump a little. Look down into the hole with a flashlight and you can see the slot it rides in. (Red arrow below)
9. Orient your new assembly about 1/4 turn counter clockwise from where you want it to be when installed. Grab a long flathead screwdriver and turn the oil pump input to the same position as the bottom of the shaft.
***NOTE: there's a small seal on the base of the assembly where it mates to the engine block that keeps oil from spurting out. MAKE SURE YOUVE GOT ONE before the next step!!! Just realized my new assembly didnt have a new one on it. Stupid mistake but now Ive got a nasty oil leak. Getting fixed today***
10. Carfully slide the new assembly back into the hole. If you lined the oil pump up correctly, it should slide down all the way flush with the engine block. And the "wheel" should be oriented correctly. If not, trial and error fit and position the oil pump until it all lines up the way its supposed to. Just make absolutley sure that the wheel is in the exact position it was when it came out.
11. Put the bracket and bolt back in place dropping it often and cussing a lot.
12. Plug in harness.
13. Put cap and 2 hexs screws back on.
14. Reconnect battery
15. Say a little prayer and then crank the engine. Keep an eye on the oil pressure since you just played with the oil pump as well. If all went well have a beer.
If not, cuss and throw things.
***Keep in mind this was on an 06. The 03 FSM I have (linked in my sig) doesnt really help, theyre different***