4.6 with aluminum block
Hey, I just bought a 2003 Exp with the 4.6 aluminum block engine. I did not realize it had an aluminum block until after I purchased the truck. I have been reading the treads and have not read much about these engines and there expected life. Are they as reliable as the old cast block 4.6? I had a 96 F-150 with one and it had 173k and was running strong.