12 valve 5.9 cummins rear main seal install

Crew Cabs were not available with the 5.9L Cummins engine. We’ll go into more detail on increasing performance on our first gen 5.9L Performance upgrades post. High performance numbers can also be achieved cheaply, and the 6BT engine is more than capable of handling extra power without adding too many support modifications. Today, we know the first gen Cummins to be capable of producing high horsepower and torque numbers incredibly easily. These allowed Dodge’s D/W 250 and 350 to give truck owners a best-in-class 400 lb-ft of torque while also improving drivability and throttle response.Īlthough the 160 horsepower and 400 lb-ft of torque doesn’t seem impressive by today’s standards, they were very impressive for the time. The 1st Gen 5.9L Cummins had unique specs never before seen on a diesel pickup truck, including a Holset fixed geometry turbocharger and direct fuel injection. When the 5.9L 12-Valve Cummins engine was introduced to Dodge’s D/W truck lineup, it created a new standard for OEM diesel performance. Even today, 30 years later after their inception, there are multitudes of 1st Gen 5.9L Cummins trucks on the road. In my opinion, it’s by far the most reliable diesel engine ever put into a pickup truck, with the only close competition coming from the 7.3L Powerstroke. If you’re familiar with diesel trucks, you’ve probably heard of the first generation Cummins.

12 valve 5.9 cummins rear main seal install