When I changed the spark plugs, I noticed the plastic shields for the wires were tried out and broken aparts.

Are there specific type of plastic shieldI must use for these wires?

It must gets really hot in there, this is a really bad engineering idea. Ford and Volvo, wow.. a whole bunch of idiots, no wonder they are loosing so much market to Japanese cars. And yet, I drive a Ford truck and a Volvo S80. They better get their act together or my next car or truck won't be neither.

Now that I let it out. Please advice. Thanks!

 

Regular corigated sheilding will be fine.
You can ususally find it at radio shack or a place like that.

Volvo used it long before ford was in the picture.

 

I saw some at home depot electrical area, but didn't buy it. It said upto 200F, not sure if that's good enough. I wonder if there are better product with high heat resistance.

 

Ther might be but I haven't looked myself.