Engine diagnostics - video 04 part 1 - valves and valve springs
In video 16 of the engine overhaul series, we disassembled the valves and valve springs.
Not all of the cylinder heads we showed were in good condition, this does not mean that all parts need to be replaced. After a thorough diagnosis, it will show if the valves and valve springs are still reusable. This video discusses valve and valve spring diagnosis. It consists of four parts.
In part 1, we will analyze the operation of valves and valve springs, and explain why valves can float.
In part 2, we will measure valve spring pressure at maximum valve lift.
In part 3, we will show how to measure the installed length of the valve spring, and measure with how much force, the valve is pressed onto the valve seat.
In part 4, we will perform a visual inspection of the valves, valve springs, valve spring retainers and valve keeprs, and discuss specifications.