...four cylinder engine? I am looking to help a friend change the timing chain in his truck because he cannot afford to take it to a shop to have it fixed.

Any help or suggestions would be greatly appreciated
i have torn down and worked on a dodge neon engine, and a chrysler v-6, i just had the luxoury of having those engines on a stand, i was just looking for tips to do it in the truck, appreicite the answers so far