DannyP posted:Stan Galat posted:Carlos G posted:Stan Galat posted:
If only they could figure out timing belts, a modern car might run forever.
I thought they had that figured out with timing CHAINS. Then they went to belts. I'm sure the belts offer some kind of plus somewhere, other than the pocket books of the dealerships.
The chains were less than awesome back in the day. When cars began moving to OHC engines the small problems with short chains became big problems with really long chains. Belts were meant to be a way this could be easily remedied, with a reasonably easy to access normal wear item.
That went out the window pretty early on.
I'm betting that a timing belt/idler pulley arrangement is cheaper than chains and ramps and hydraulic tensioners. Follow the money......
Guys! WTF? I thought this was an Old Porsche Appreciation site. Everyone knows the hot valve actuation setup is shafts and bevel gears!