Valve covers 3.9- Redesigned??

[Alan]

I'm new to the forum so give me a little leeway.
I found the forum because I am trying to track down a misfire,but the check engine light isn't on and I have no stored codes.Therefore I have read many posts on the coils and plugs and intend to replace them all myself when the weather in the Northeast warms up.
I bought my'01LS used,while still under warranty in '04 a dealer replaced both valve covers and seals because of leaking oil that was smoking.

Here's the point of my post. The Dealer said that the new valve covers were a redesigned version and that the problems with leaks and coils would be cured.
The part numbers were XW4Z*6582*BB and W4Z*6582*AB.
Are these in fact a improved design? Wouldn't that constitute kind of an admission on the part of Lincoln that the original design was faulty??

 

[NYC LS8]

It was the gaskets that were redesigned, not the actual covers themselves. Since it's Ford, it's not an admission of anything, as they don't warranty the 00-02 coils, gaskets, etc. like they do the early model 03s for 10 years/100,000 miles.

 

[NateRW21]

You should be good on the gaskets; the coils though, you'll have to replace on your own. If you push your car hard enough, it should throw a CEL and tell you what cylinder you need to replace. Or you can do them all and save yourself the headache of replacing one at a time until you get all the weak ones replaced. Might be worth it... might not...