Timing Chain Stretch Question

[thstone]

Originally Posted by Fyeganeh

The reason I ask is modern cars have start/stop systems that turn off the engine at a stop light to save fuel. But then a car will have probably 10x more starts for the same number of miles. Does that then lead to quicker failure of the timing chain?

Modern cars with auto start/stop are designed to withstand the rigors of thousands of additional starts as compared to their non-start/stop counterparts.

For example, the starter motor itself will see thousands of additional operations but has been designed with this in mind so the overall reliability stays about the same between start/stop and non-start/stop cars. The same is true of the other components that will see higher wear because of the start/stop system - they are designed to take the additional wear and tear.

Here is some good reading on the subject: https://www.greencarreports.com/news/1109687_dont-start-stop-systems-wear-out-your-cars-starter