Constant reports of BS6 engine breakdown’s in the recent past has led us to dive further into the issue. The strict BS6 norms seems to have affected the performance of BS6 Engines. There have been constant queries and reports of clogged EGR valves, Soot accumulation in DPF filters on Auto Enthusiast platforms.

Such conditions often lead to low acceleration and reduced performances in vehicles. This problem is being reported quite regularly in the new BS6 diesel engines that are currently on sale. Here are a few problems that might have been the reason behind such issues.

Oil Dilution- Possible Cause For DPF Clogging

BS6 engines that have been manufactured with late post Injections usually suffer from such problems as Engine oil dilution. Late Fuel Post Injections are some of the most commonly used technology that are used by manufacturers to provide the vehicle with a High Exhaust temperature necessary for active regeneration of DPF filters. Most new engines that have active DPF regen have such late fuel post- injections.

Oil Dilutions often cause the performance to drop and engines to fail. Beyond this vehicles that do not have any NOx Storage Catalyst often suffer from such issues as well.

How Is Active Regen of DPF Filter Achieved in BS6 Engines

The modern BS6 engines have been adapted in such a manner that they go through constant regeneration even while driving. Regeneration is achieved by High Exhaust temperature for which Late Post Injectors Continuously inject a small amount of fuel after the main cycle of combustion. Hence it can be said that the features that facilitate Regeneration of DPF filters also cause the engine to have Oil Dilution.

BS6 Time Duration of the Engine Regen

While these late injections might not cause issues when the vehicle is new, over time with frequent cycles they might face oil dilution that affects the over all performance. Most of the times these late post fuel injections are timed to be closer to the exhaust valve opening during the expansion stroke.

BS6 Known Issues

Users who have been primarily using their diesel vehicles in the city have reported increased instances of performance drop. As per the reviews it has become quite clear that while being driven in the city limits Diesel engines DPF filters would get clogged and cause the vehicles to loose their performance.

BS6 Diesel Cars that are Still Available in The Market

With the strict emission norms that are being implemented, manufacturers have stepped away from Diesel engines. Still here are a few of the Diesel cars that are still available in the market.

Hyundai Creta BS6

Hyundai Creta is still offered with a 1.5 CRDi four cylinder engine that produces a peak power output of 113 Bhp @ 5000 RPM. The diesel variant is still one of the highest selling cars that Hyundai offers in India.

Toyota Fortuner BS6

The Toyota is powered by a 2755cc diesel engine. The engine produces 201.1 BHP @ 3000-3420 rpm. Beyond this the vehicle also produces a peak torque figure of 500 NM @160-2820 RPM.

Mahindra Scorpio N/ Thar BS6

The Scorpio has a 2198cc diesel engine that produces about 172 bhp @ 3500 RPM and a max torque output of 400 nm @ 1750 rpm. Mahindra further offers the Thar as well as the Thar Roxx with diesel engines as well. The diesel engine in Thar is of 2184 cc’s

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