Lapping valves ensures a perfect seal and can help with running significantly. Be careful not to get stray grinding paste into valve guides. Get more helpful hints with our course, How To Remove, Revive And Decoke Your Engine Cylinder Head.
Tyre rubber deteriorates over time, and should be replaced once it gets too old. Matt and Danny explain the dating system used on modern tyres. For more helpful tips and techniques, be sure to check out our MGB Service Guide course.