The old Corollas in the 70s and 80s had timing chains. In the 90s, Honda, Toyota, and even Nissan started making belt-driven cranks instead of chains. Now they are back to timing chains. What happened?
In: Engineering
Excellent examples of chain driven motors are:
Any pushrod design. 1 short chain. Pushrods get bent, new pushrods go in.
Inline single overhead cam motors without variable timing. 1 longer chain but still very simple.
Passable chain configuration:
V motors with single overhead cam. Two chains but nothing crazy.
Examples of bad chain driven motors:
V motors with dual overhead cams. Bunch of chains and tensioners, complicated but they could go the distance.
V motors with with dual overhead cams and variable valve timing. The phasers will be fucked up and the chains stretched at 100k.
V motors with dohc, vvt, and why in the fuck would you put chain on the back of the motor Audi? Well why not double down and make it a hot V with the starter in the valley?
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