How Do You Replace The Water Pump On An 89 Nissan 240sx?

Unless you have experience working with vehicles, I do not suggest doing this repair yourself. With that warning, I suggest getting a Haynes automotive guide for 240sx model, or a chiltons if you cannot find a Haynes. You are going to have to replace a number of seals, and you may find you need to replace a belt along the way too, so be prepared for more expense than just the pump. Also make sure you have all the appropriate tools ready on hand, including a timing light, typically the water pump is often driven by the drive shaft or cam shaft. Specifics will be found in your automotive repair manual (Haynes or Chiltons). Good luck.