I have been putting myself through school learning maintenance for my 22re vehicle. One question that seems difficult to answer because it is between basic and advanced relates to proper lubrication technique. Due to a background in bicycle mechanics, I basically want to clean and lubricate every fastener or piece of hardware that becomes accessible. The bolts generally are treated with great, whereas any bushings, friction points or springs get oil. Can anyone recommend any good reading material on the subject? Seems like this could very well be Chapter 1 of a textbook for automotive maintenance. Here is a recent chatgpt inquiry to share in hopes of some fact checking. Somehow I am doubtful oil would be recommended over grease on all bolts intended to be torqued.

 

you have a good start on it with that chatgpt; basically, dry threads don't play well with each other, don't do it, particularly when it's different metals like steel studs in aluminum heads, holding on the exhaust manifold, that gets lots of antiseize, including on the nuts.

it gets kinda complicated tho; bolts that are torqued tend to stretch, so some bolts shouldn't be reused, aka head bolts/studs in some applications.

different lubes on bolts can change the actual torque, because there are differences in friction that affects the torque readings... sometimes threads in holes need to be cleaned, but don't use taps, there are special threaded bits for that, or cut a lengthwise groove in an old bolt to clean it out.