Lastly, we re-installed the serpentine belt. Total time to swap the pump was about an hour with most of that time spent screwing with pulling off the OEM pulley. We also asked Jeff about the plastic reservoir tank and its tendency to puke fluid. He stated, "The reason fluid seeps out of the cap is because the vent for the reservoir is there. When the fluid heats up, it expands and compresses the air volume in the reservoir. When that pressure reaches 7.5 psi, the valve relieves. If the pressure is allowed to build too high, the reservoir can actually crack. The solution is to use a low-expansion synthetic fluid or just run the fluid level a bit lower at driving events."