I wanted to inspect my oil pump tonight so I started taking it apart. I removed a cover and found a plunger. I tried removing this plunger but it wouldnt come out. I gave up because it was too cold to work, so I put it back together to keep things clean inside and now the throttle linkage leading to the pump is tough to move and it gets stuck at 25% open. I was going to buy a new one anyways for safety but Id still like to know I did.