What they don&#x27;t teach you is the &quot;tricks&quot;.  Looking for an air leak using a spray bottle, putting anti-seize on engine bolts as you are reassembling engine parts (like an alternator attachment bolt!) or just how important correct torque and new fasteners are.<p>And that doesn&#x27;t even begin to touch the true magic in having a large collection of chemicals.  Know when to use DC-4, WD-40, 33MS, brake cleaner, contact cleaner, and of course, GOJO.