D & J Precision Machine

D Blankenship 

on Google

2 months ago

Please read if you are planning to buy an engine from D&J. I saved up to buy their "Heavy Hauler" engine with a 2 year warranty when my 600,000 mile factory 2019 Ram 6.7 engine was starting to wear, I trusted D&J would build me an engine that would last at least as long as the factory engine lasted. But after only 4 months the engine simultaneously started burning oil, sudden increase in blowby, and smoking etc Drew and Josh, from D&J, said that they recommend 3,000 to 5,000 mile oil change intervals and as long as the engin... read more

Brian P 

on Google

8 months ago

DO NOT USE THIS MACHINE SHOP. They pulled a bait and switch on me. I sent them a long block core 6.7 Cummins engine. Week later, they told me that it was disassembled, and everything checks out good. So I approved them to build the engine ($16k). After 3 weeks they email me telling me that my engine is all done but I would have to pay an additional $1000 because the core block I gave them has a piece cracked off. Why didnt these jokers see this on the front end? They claim that they rigorously inspect the engine before build... read more

Melisa Hayes 

on Google

a year ago

Drove 8 hours to pick up my stage 2 cylinder head. Nicest, most helpful group of guys I've seen at any business, took the time to listen to my build plans, to make sure I was getting what I needed. 

Trader Swapp 

on Google

a year ago

Awesome products! I’ve got their billet valve cover, 115lb valve springs and retainers, as well as their billet freeze plugs on my 2004 with a 6.7 in it. Would buy all of the products again. Thanks guys!