Your 6.0 Powerstroke is showing the classic trifecta: stretched head bolts, a cracked EGR cooler, and a clogging oil cooler. We fix all three together — ARP studs, upgraded cooler, new oil cooler — right in your driveway.
The 6.0 Powerstroke's three famous weaknesses are connected, which is why fixing them one at a time never works. It starts with the oil cooler: a tiny stacked-plate heat exchanger buried in the engine valley that slowly clogs with debris. Once it plugs, the coolant side stops flowing properly — and the EGR cooler, which sits downstream and depends on that coolant flow, starts running dry and overheating.
An overheated EGR cooler eventually cracks internally, dumping coolant into the intake and out the exhaust as white smoke. Meanwhile, the factory torque-to-yield head bolts simply aren't strong enough for the cylinder pressures this engine makes — especially if it's ever been tuned or worked hard towing. The bolts stretch, the head lifts microscopically under boost, and combustion gas pushes into the cooling system. That's the bubbling you see in the degas bottle.
Replace just the EGR cooler and the clogged oil cooler kills the new one. Replace just the head gaskets with stock bolts and they lift again. The right repair — what diesel people call bulletproofing — is ARP head studs, new head gaskets, an upgraded EGR cooler, and a fresh oil cooler, all in one job. Done together, this engine becomes the reliable workhorse it should have been from the factory.
If your Ford is doing any of these, this is the likely cause:
Every heat cycle with stretched head bolts pushes more combustion gas into the cooling system, which over-pressurizes it and finds the next weak point — usually the EGR cooler or the degas bottle itself. Keep driving and the coolant loss accelerates until the engine overheats, and an overheated 6.0 can warp or crack a head. At that point you're buying machine work or castings on top of everything else. The trifecta fixed early is a big job; the trifecta ignored is an engine job.
Yes — it's a long job, not an impossible one. Head studs, EGR cooler, and oil cooler on a 6.0 are all done with the cab on and the engine in the truck. We need a flat spot to park, a few days, and decent weather or a garage/carport. Everything else — tools, torque equipment, coolant, disposal — comes with us.
It's 30+ hours of labour at shop rates, plus parts billed at list price, plus shop overhead. Many shops also pull the cab off, which adds hours on its own. We quote one flat price for the complete job — studs, both coolers, gaskets, fluids — before any wrench touches the truck, so there are no surprise add-ons mid-repair.
If your degas bottle is bubbling, the heads are already lifting — a new EGR cooler alone will crack again because the root cause is still there. And a new EGR cooler behind a clogged oil cooler dies the same death. The three failures feed each other, which is exactly why this job is done as a package.
A 6.0 with studs, a good EGR cooler, and a healthy oil cooler is genuinely durable — these engines fail from their accessories, not their bones. If the body and frame are solid, bulletproofing costs a fraction of replacing the truck with anything comparable, and 2005–2007 Super Duties are still worth real money in the GTA when they run right.
Send it over for a free second opinion. I'll tell you straight what the job actually involves — and if their quote is fair, I'll tell you that too.
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