Megane IV phI Detect worn timing chain by oscilloscope

[fishhead]

Hi folks,

as an owner of a Renault Megane 3 (Model 2013, H5F400, 180.000 km) I came across the article "The Hidden Cause Behind Failing Timing Chains"
(https://www.diagnosedan.com/de/the-hidden-…-timing-chains/)
Especially the extract from DD-5955 on the crankshaft/camshaft ratio captured with the scope caught my interest.
So I replicated this capture with my H5F400 and you can see the identical 7 crankshaft pulses from the gap til the next edge of the inlet camshaft signal.
Is anyone familiar with the signals of a fresh timing chain, or does my timing chain need replacement asap ?

I sent an email to diagnosedan.com but never received an answer, they are clearly not interestest in inquiries from hobbyists.

The crankshaft seems to be divided by 60 teeth with 2 missing for the gap, so one pulse to the next one would be equivalent to 6°.
If 7 crankshaft pulses like in my picture already defines a worn out chain, how many pulses will I count for a freshly mounted timing chain ?

https://renaultforum.net/core/_data/public/thumbnail/b0/a0/153-b0a05599ff3da60eda8ca040c9ad68f08b43a81d896b7d4b1b17ad7d86311f7b.webp

Edytowane 5 Lipca przez fishhead

[carsik]

For model pulses: every 720 degrees, the end of the pulse from the shaft coincides with the center of the pulse from the camshaft.