Repair
6.0 Power Stroke problems, and the order to fix them
Most 6.0 failures happen in a chain, starting at the oil cooler. Here's the order that makes sense to check and fix them.
The 6.0 Power Stroke (2003–2007) has a reputation, and most of it comes from one thing: its problems tend to happen in a chain. Fix the link that failed last and the next one goes soon after. Start at the front of the chain and a 6.0 can be a good truck.
This is the order that makes sense to us, starting with the one that costs nothing.
1. Watch the oil and coolant temperatures
On a healthy 6.0, engine oil and coolant run close to each other. When oil runs 15 degrees or more hotter than coolant, the oil cooler is usually plugging. You can read both on a monitor or a scan tool, and it's the earliest warning this engine gives.
2. Keep the coolant right
Worn-out or mismatched coolant leaves gel-like solids behind, and with leftover casting sand they plug the oil cooler. Use the coolant your manual calls for and change it on schedule. It's the cheapest item on this list.
3. The oil cooler
A plugged oil cooler starves the EGR cooler of coolant flow. Replace it before the EGR cooler fails and the chain stops here.
4. The EGR cooler
A starved EGR cooler can rupture. White smoke and disappearing coolant are the signs. Left alone, it leads to the next item.
5. Head studs, when the heads come off
The 6.0 holds each cylinder head down with four torque-to-yield bolts per cylinder, and overheating can stretch them until a head gasket lets go. If the heads are coming off, studs are the usual fix. Nobody should pull heads just to install studs on a healthy engine, though.
6. The FICM and the injectors
The injector control module (FICM) is a common failure on its own. Sticking injectors are tied to oil quality, so oil changes on schedule help here too. High-pressure oil leaks can cause hot no-starts as well.
Where most 6.0 owners should start
Start with what you can check yourself: the temperatures and the coolant. Then get the truck looked over. If it's healthy, you'll know what to watch. If it isn't, you'll know which link is failing before it takes the next one out.
