As the buildup accumulates, engine performance and efficiency is gradually reduced. Sign up for more restomod content to add horsepower to your inbox. Cracked EGR Cooler Roughly percent of all EGR cooler failures are the result of a plugged oil cooler starving them of coolant, hence the reason we spotlighted the oil cooler as the 6. A Taxed Engine Cooling System Even without coolant supply being restricted or cut off due to a bad oil cooler, the 6.
More From Driving Line No seriously, you need to read Part 1 to find out why the oil cooler is the 6. What Others Are Reading 7. Recommended For You. Pattern Problems: 6. LML Duramax. The Power Stroke Blues: 6. Subscription Confirmed! Look for the latest news stories and features, sent straight to your inbox! This is being done in an effort to reduce the amount of nitrous oxide gas coming out the tailpipe.
This all started with the EPA tier one emissions standard. Ford continued with this system throughout the life of the 6. The EGR cooler design was changed slightly. The redesigned EGR cooler 6. This cooler should have cooled the exhaust more efficiently. The Ford Powerstoke 6. These coolers are failing just like the 6. We have many customers that have experienced engine failure due to the engine hydro locking when coolant is introduced into the engines intake manifold.
Many trucks have had the cooler replaced multiple times in the first , miles. It is possible for a completely stock engine to produce exhaust gas temperatures well in excess of degrees.
So imagine taking degree air and constantly running it through your heater core day after day. How long do you think it would last? Next, put that heater core in an enclosed box that has to endure not only the high temperatures, but also psi of exhaust backpressure that is built before the turbo between it and the exhaust manifold. Even though the cooler is made out of materials that are meant for higher temperatures, it is not a matter of if, but when your cooler will fail. Best case scenario is that the cooler just leaks a little coolant into the exhaust system and it passes out the exhaust and you just notice some coolant loss.
Worst case scenario, exhaust pressure is able to enter a break in the cooler and enter the coolant system which only runs at 12 or so psi max. The high pressure will ruin head gaskets and oil coolers. Also, the coolant system cannot keep the truck cool with that much pressure in the system.
This is why you will hear about or may have experienced coolant puking out of the filler cap on the degas bottle after pulling a load up a long hill. The cap is made to bleed off pressure above psi. The increased coolant temp and extra pressure being pushed in from the exhaust will push coolant right out the cap.
We have a truck in the shop right now with a blown egr cooler and head gasket. The pressure in the coolant system had gotten so high that it blew one of the hoses right off the coolant bottle. This truck was a bone stock work truck.
This blown cooler problem only gets worse when you put a programmer on the truck that raises exhaust gas temperatures several hundred degrees. If you put your programmer on the highest setting, hook to a heavy trailer, and then go tugging up a long grade, I suggest you put your mechanic on speed dial. You will need his services soon. As if that all isn't bad enough, the egr cooler will break down the Gold coolant that is installed in the truck from the factory.
The high exhaust temperatures in the egr cooler will cause some elements of the coolant to drop out and turn into a sludge material that will cause all sorts of problems in the coolant system. The sludge will start clogging up the oil cooler and will restrict flow through it.
The next place the coolant heads after the oil cooler is the egr cooler. As the oil cooler becomes more and more restricted, the less flow through the egr cooler there is. This why you sometimes hear about people blowing egr coolers one after another in very short periods of time. The mechanic replaced the cooler but did not check the oil cooler to make sure it wasn't clogged. We suggest changing the oil cooler when doing an egr cooler replacement if your vehicle has over K miles.
The test is to monitor oil temperature and coolant temperature with a scan tool.
0コメント