Originally Posted By: KrisZ
Originally Posted By: wsar10
No your very incorrect here, a chain just like ANY mechanical part will wear
PERIOD. I work with a mechanical engineer on my team at work, we have this conversation all the time.....
I agree that a belt should need maintenance before a chain. Contact ANYBODY with an engineering background or a professional engine builder and they will tell you the same. To make that decision based on what a manufacture says is "maintenance" is foolish ! Thats half the purpose of this forum, dismissing the "maintenance schedule" and educating yourself through science about your REAL maintenance needs of a vehicle.
Since you already know that
every moving part will be subject to wear during engine operation. Why are you suggesting to change only the timing chain at 100k miles? What about cam shafts, valves, pistons, main bearings? They all wear and you can be sure that they will not be exactly the same as brand new.
What you're not getting from your engineer friend is that all mating parts are made to specific clearances and unless those clearances go beyond the maximum specifications, the engine will not be considered worn out by any mechanic or engineer. Same thing applies to the timing chain.
The "foolish" part is squarely on you
Your creating your own context just to pursue or create an argument. Do you UNDERSTAND the importance of timing in an engine ? Do you understand how a non-linear part can wear and effect timing, emissions, combustion and overall performance ? bearing wear does not effect valve timing......Do you really not understand the difference between a chain and something that a solid peace of machined metal ??
Nobody said anything about an engine being "worn out".
I surely hope you have it done in that Mazda before it causes a REAL problem.....it should also be done 100k ish. Maybe you'll get lucky and it lasts but I would not count on it.