What year did they move the water separator? Both my 84 & 87 were in the same place. Did they change the design too I hope?On the "89, the water separator is on the base of the fuel filter. Look at the 1/10th roller on the odometer. It will move a little away from the rest of the rollers when it gets close to 100,000 miles. I watched it do that on my '89 seven times. It didn't make it to eight times, so I don't know how long it will go.