Hello Diesel World, I have been a reader for a while now and have recently purchased my first diesel... a 1993 Chevrolet 4x4 with a 6.2L diesel engine. I know that the 6.2L diesel is not in the same league as the new trucks, even though it has quite a few miles on it, the engine still starts very well, runs smooth and the overall truck is still in great shape. But, I use the truck to commute 5 days a week, so fuel economy is important, but I would also like to improve the truck’s towing performance a bit. Please let me know where to start! Thanks! Winston Guild
Williams Lake, BC Canada Hello Winston, Welcome to the Diesel World! 1993 was the last year for GM’S 6.2L diesel engine. Some
Incidentally, GM used the very same cylinder block casting for both its 6.2L and 6.5L diesel engines during the 1992-93 model years. The 6.2 just used smaller pistons. So, this means the 1992-93 6.2 can be bored to a 6.5, when the time comes to rebuild the engine. Good luck.yes, the 305 is still a great engine, and has a lot of potential. Thanks for writing. There’s actually a lot you can do to improve performance, and for not a lot of money. A turbocharger has always been at the top of the list when considering power improvements for the 6.2L, and you can install all of the factory turbo-related components used in the 1992-99 GM 6.5L turbo diesel powered pickups and SUVS. These parts are easy and cheap to find, and they’ll bolt right on without any modifications. With 7-10 psi boost pressure and a minor fuel calibration increase (that you can do yourself), the engine should produce up to approximately 180-horsepower and 360 lb-ft of torque. This is a big percent improvement. If you run at typical freeway speeds, your truck’s fuel economy shouldn’t be affected, but you will see a big improvement in performance. things to keep in mind when discussing the 6.2 is that it was designed primarily as a fuel economy engine, and having just enough power to do what most people needed to get done. In 1993, the nonturbocharged 6.2L diesel was flywheel-rated at about 155-horsepower and 275 lb-ft of torque.