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Cummins 6BT 12-valve engines are becoming more and more popular, thanks to their near-indestructible nature. Unfortunately, these engines (commonly found in ‘94–’98 Dodge Rams) are two decades old, which means chinks in the armor are showing up.

One of the most common issues with these engines centers around the cylinder head. After 20 years, many of these heads are cracked, warped or both. A blown head gasket is also a common problem. Either way, this means the head is coming off the truck.

Our good buddy has an 1,100 hp Cummins that ran headlong into the cracked cylinder head issue after a couple of passes where the water injection didn’t turn on. There were numerous cracks between the valves and even at the exhaust ports after some outrageous EGTs. A new cylinder head was needed—but where to find one? After three attempts with used stock heads, it was found that one was rusted, two were cracked, and all three were unusable.

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Diesel World July 2019, Look Inside : The New 2020 Silverado, How to build your own Power Stroke, Common Rail vs. Mechanical Injection, And More....