Head over to YouTube and search user AgentJayZ. He's a turbine engine technician and has a YouTube channel with 300+ videos. He's probably one of the best techs I've seen. Each video is highly detailed and he's very good at explaining things. If you fly jet warbirds then you need to watch these. He focuses mostly on the J79, Orenda, Olympus, Spey and recently the Ai-25 from the L-39.
Here's a link:
https://www.youtube.com/user/AgentJayZ