Had to pick between a full rebuild or just dropping in a used engine on a 6.4 Powerstroke last month.

The owner needed it back fast and the used motor from a yard in Kansas City was half the price, so we went with that swap. It's been running fine for three weeks now, but I'm still waiting for the other shoe to drop with a 6.4. Anyone else feel like you're just renting time when you skip the full rebuild on these?

3 comments

3 Comments

julia_patel1mo ago

Yeah, the "gamble either way" thing is so true for a lot of stuff now. It's like fixing an old phone or appliance. You can put in the cheap part and hope, or spend a ton on a full fix, and either way it might just break again next month. Makes every choice feel temporary.

campbell.tara1mo ago

Logan's point about a good used motor lasting years is fair, but calling it "overblown" misses the mark on a 6.4. That engine is a known time bomb. You didn't fix the root problems, you just swapped in another one with its own hidden wear. Julia_patel is right about everything feeling temporary now, and this is the perfect example. You saved money up front, but you're just waiting for the same old failures. A proper rebuild addresses the weak spots, so you're not starting the same countdown over again.

loganl221mo ago

Honestly, I get the worry, but is a full rebuild always the right call? A good used motor can go for years if it was treated right before. I've seen a few 6.4s with junkyard engines hit 100k more miles, no problem. The whole "renting time" thing feels a bit overblown sometimes, you know? Sure, it's a gamble, but so is pouring a ton of cash into a full rebuild on a truck that might have other issues.