CHECK THIS before replacing the timing chain

In this about replacing the timing chain, I will tell you what you need to check before replacing the timing chain.
Hello!!! in short, the timing chain rattled, at first I wanted to change the whole set, and these are 4 stars of the timing chain, the timing chain itself, the timing chain tensioner, the timing chain caliper.
The whole set would cost me about 10 tr. But then I decided to check the timing chain tensioner for work and it turned out that he simply jammed.
I had to order a hydraulic tensioner in the EXIST online store a new timing chain tensioner. It cost me 1600 re and just that! so I would lay out for replacing the timing chain kit about 20 tr.