Which American Engine Will Last The Longest
- Thread starter Dehaka
- Start date
OVERKILL
$100 Site Donor 2021
This. The Modular will probably out-live the OP.
Guide breakage is quit common on 2V Modular engines....The engines lives & will even run.
Guess we got lucky around here, literally dozens of 2V 5.4s that I know of still running strong and never had this issue....some of them have the startup piston slap though.
OVERKILL
$100 Site Donor 2021
It depended on the age of the mold used to make the guides. Ford had some issues with using the molds too long and the guides that were produced using the old molds would have QC issues and fail, while the guides produced using fresh(er) molds would last.
Experienced this first-hand as my buddy's '03 F-150, his guides failed and his engine jumped time at less than 100,000km (60,000 miles) while our '02 Expedition soldiered on with well over 200,000 miles on it with the original guides, just like my dad's '00 Expedition, which is still on its original guides, as is his '03 Town Car. Town Car my buddy looked at to buy at one point had 1.2 million km on it, engine had never been open, just oil, filters and plugs and I assume a coolant change.
I’m going to add the Chevy 6.0 Gen 4, LS engine. Mine has 265,000 miles. Single owner. The trouble is, the 6L90 transmission has the same mileage. If I want to keep going I’ll probably have to have it rebuilt at some point. That would probably mean laying out more than the 17 year old truck is worth. I guess it’s a Call of Duty. 
I think it is the best gas engine ever made for its application. i have seen countless work trcuk with this go forever under very extreme circumstances.
One thing for sure, it aint a going to be a Ram engine.
4WD
$50 site donor 2025
Yeah, lots cheaper if planned before it grenades …I’m going to add the Chevy 6.0 Gen 4, LS engine. Mine has 265,000 miles. Single owner. The trouble is, the 6L90 transmission has the same mileage. If I want to keep going I’ll probably have to have it rebuilt at some point. That would probably mean laying out more than the 17 year old truck is worth. I guess it’s a Call of Duty.
I've been driving old cars for 30 years, and never had an engine "go out". Unless you abuse them or use them commercially, this experiment could take a long, long time.
3800 all day long.