This summer was extremely hot. Maybe for BMW Korea it would be remembered as the hottest summer in the history of its operation. In this summer, there were several news about BMW 520D (diesel) was catching a fire during. And this was not limited to BMW 520D model, other models were caught on fire as well. This definitely scared people enough to ban BMW at underground parking lot as if it would catch a fire anytime soon like a bomb.
Unfortunately, this issue happened as soon as I got my new BMW 420D. I was definitely worried about the safety. I also got very disappointed at BMW brand. How could this happen? To me, BMW equals to trust.
After BMW investigation, they concluded that this issue has to do with EGR model with old cars. Then their remedy for this is to clean EGR valve with old models. BMW Korea promised that they would investigate further and report to BMW owners about their findings. But after hot summer is gone, their promise is also gone. It appears that they concluded that if they change EGR module, the problem will be gone for good.
If you’re curious about this incident, please read article first.
I am really hoping that this would be the case. But some expert discovered uneasy evidences that say otherwise.
As soon as you start driving, diesel car(or high performance gasoline car) starts producing unwanted wastes which is carbon sludge. This happens from intake manifold area, when engine burns carbon sludge waste, it produces pollution components. Then EGR(exhaust gas recirculation) kicks in to reduce NOx (nitrogen oxide). Naturally more carbon sludge buildup causes EGR to work more. Not only workload to EGR, carbon waste will build inside EGR valve.
Aftermath of BMW catching a fire in this summer event triggered a serious of questions to many intake manifold experts. They don’t believe cleaning EGR valve or change it to newer version will resolve this issue completely. When you are sick, doctor should cure the cause of the disease not symptoms. If you remove symptoms, and if you haven’t figured out the reason for the disease, it will happen again when conditions are met.
It’s been quite a while since D Clean sales to customers. We wondered if they are safe with EGR valve clogged up with carbon waste. So a few days ago, we asked intake manifold cleaning expert to disassemble manifold area including EGR valve.
It took a lot of time to wait for engine to cool down and disassemble it. But we were quite surprised that D Clean did more than it was expected to do.
First off, intake manifold area is extremely clean as if one cleaned it in regular basis.
Secondly EGR valve is also very clean, in other words, it’s not clogged up by carbon waste.
At last, inside manifold area is also very clean. We found some carbon sludge buildup in the manifold area but considering car’s long mileage, it’s also no carbon sludge buildup.
All this user had to do is just to drive and enjoy everyday riding. D Clean took care of carbon sludge and cleared EGR valve clogging issue for good. Now readers can easily guess what is the real cure for BMW diesel car catching a fire issue. At least we’d like to pose a reasonable doubt about BMW’s resolution. Cleaning or changing EGR valve is a short-term solution which doesn’t guarantees driver’s safety.