It is a cast iron HPOP - ie 05+.

 

That is definitely an 2005 and newer engine. I was going to chime in to say another easier way to identify which version of engine you have in your 2005 Excursion would be to look for the presence of an EGR throttle body assembly on the intake, but it looks like you covered that already.

 

I wanted to comment on your serial number on the motor. It is the same type of numbering system that I have on my parts motor. I have zero info on whether my motor is a rebuild or not. It is a 2004.5 with the old style HPOP and ICP on valve cover with wavy oil rails.




I don't hang around in here all the time like the others, but you are the first other person that I have seen with this type of serial number. I just wanted to show you that you are not alone with an odd serial number.

Kevin

 

Thanks Kevin for the information. I was very puzzled because the engine that died looked brand new. I did find this in a document that gave me some details. So my dead motor was a Huntsville motor, but based on the serial number it looks like a later engine. It could be it was the original that was removed and cleaned up for studs and general bullet proofing.

• 6.0L engines built in Huntsville, AL have a serial number break of 1 to 299,092 (2003 to early 2006 MY) or 299,093 & Up (late 2006 MY).
• 6.0L engines built in Indianapolis, IN have a serial number break of 6,000,000 to 6,723,721 (2003 to early 2006 MY) or 6,723,722 & Up (late 2006 MY).

I just got the truck back after getting a fresh DFC Street Series motor. I went that direction because the mechanic I went with is a DFC dealer. Might have been a bit more expensive than I could have got from someone else, but the engine was in stock and could be turned around quickly.

The history of the old motor is still a mystery. One mechanic that added the bulletproof cooling system said it was definitely a replacement motor. The guys that swapped it out said it was an original engine. My label on the valve cover was yellow with model A325E. I searched long and hard to figure out what the A325E is relative to A325 or A325C, but no luck. It's all moot now. The failure mode for the old motor was a busted crank - what are the chances of that happening? It's also amazing the truck ran for 15 minutes after it snapped. I would love to have the opportunity to tear that thing down...

 

I thought all the excursions had the 2003-04 HPOP. Thus, I'm confident that is a replacement engine that appears to be the later 05-07 build.

My engine is a used replacement and I used a boroscope to get the engine Ser No. I agree that your and Kevin's Numbers look different than the dotted number of mine and others. We may never know why.

 

Some Excursions got the 2005 engine ..................