New motor or rebuild?

[Colossus]

Why not just take it to a compitent repair facility and have it diagnosed? They have the equipment and expertese to do this. Don't throw $$$ at it trying to figure out what it is.

[Mikeee]

I've got 345,000 on my 03.

 

 

As to a replacement, I found on the Internet, a rebuilt long block with 4 years / 1,000,000 mile warranty.

http://www.powertrainproducts.net/default.asp

Me, I'd probably trust a Goodwrench engine.

But then, it all depends on the the condition of the transmission and body as to what path I would take. Some people swear by $900 pulled engines.