6.4 powerstroke coolant flush cost8/31/2023 Note, too, that 260-degree coolant will peg the temp gauge, and once the fluid hits 300 degrees, it melts just about every plastic part under the hood. (Yet oddly enough, this debris doesn’t seem to be a common problem with other Ford diesels, nor other brands, so some of the mystery remains.) The sediment plugs up the oil cooler, and since less coolant flows through the EGR cooler as well, the engine runs hot, and then the fluid begins to break down and doesn’t do its job. Where was this muck coming from? Evidently sand particles from the casting of the 6.0L engine blocks can leach out of the metal and into the water jacket, according to the experts. When this murky coolant was drained and allowed to sit still for a time, a fine silt settled to the bottom. But we found a few other items in the coolant system that required some attention as well.Īfter disassembling a number of failed heat exchangers (for both the EGR and oil system), and also noting a significant difference between oil and coolant temperatures, the source of the affliction become apparent: sludge and debris. Here’s a stock 6.0 Power Stroke, viewed from the location where the coolant filter will be installed. The point here is that just because you have 100K-mile coolant in a vehicle, if it’s more than three years old, it’s no longer 100K coolant. At right is a new tank, at left is a used one, showing discoloration. ![]() These two coolant reservoirs from a Duramax show how contaminated coolant can get over time, and why it needs to be checked regularly. Don’t run any number higher than a 24072, because you can actually put too much conditioner in the system, which will also cause fallout of casting sand from the block. ![]() You can use just about any brand of standard coolant filter on the market, such as from NAPA or the IE WIX, but only with a minimum amount of additive (part number 24070 has no additive, and 24071 has the lowest amount of conditioner inside the filter). The ball valves make it easy to replace the filter with a minimum of drips. It includes a billet coolant filter housing, mounting bracket, pipe plug, two stainless steel ball valves, a pair of coolant lines, and installation hardware. The coolant filter system from T&A Performance is simple to connect, requiring less than a couple hours of labor. And on the 6.0L, whose oil cooler has minute water and oil passages, this can spell death to the cooler and EGR cooler downstream. Through the process of corrosion from combining aluminum and steel parts on an engine, debris can find its way into the cooling system.
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