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I worked at the engine plant in the early 2000s that made the 4.6l v8 that was in Crown Victoria for cop cars and cabs. The cop/cab version of the engine was d
by jcampbell1 4y ago
I worked at the engine plant in the early 2000s that made the 4.6l v8 that was in Crown Victoria for cop cars and cabs. The cop/cab version of the engine was different in that it had a highly polished timing chain for exactly this reason.
- gooseyman 4y agoThis is super interesting as a person who is interested in cars, but by no means a mechanic. What does polishing the timing chain accomplish? Or is it more “accurate” timing?
- wpearse 4y agoSmoother surfaces, less friction, less wear, increased longevity.
- sschueller 4y agoSo generally a better engine. Why aren't all that way?
- gonzo 4y agoCost
- sammalloy 4y ago> What does polishing the timing chain accomplish? Or is it more “accurate” timing? I’m also curious, in terms of idling and the longevity of the engine. It has to be said, those old Crown Vics are still on the road.
- gonzo 4y agoLikely the cop/cab version uses a roller timing chain, which is lower friction that the typical stock chain.
- jcampbell1 4y agoThe timing chain is splash lubricated and at idle there isn’t enough oil pressure to produce much splash. The high polish reduces friction particularly when there is little oil.