Diesel engine in a Jeep TJ Submitted by an Anonymous Greaser on Wed, 2011-09-14 01:32 Is it possible to put a 4 or 6 cylinder diesel engine in a Jeep TJ? Pros and cons? Information on how to? Thanks! Reply to this post Yes, Cummings 4BT it's a 4 Submitted by Greasy Bill on Thu, 2011-09-29 03:25 Yes, Cummings 4BT it's a 4 cly Cummings engine it's a great motor. reply Reply to this post Your name Comment * Location * What code is in the image? * Enter the characters shown in the image.