With over 30 years experience, Tri-State Engine and Machine is a full services machine shop!

Services We Provide


MagnaFlux


Magnafluxing is the process which exposes microscopic cracks in the crankshaft surfaces.

For cast iron engine components, MagnaFlux will highlight any cracks that may otherwise not be seen.

Valve Job


All valves get re-faced. Valve seats get 3 angle valve job. To find out more about our Bullhead City valve job services or to make an appointment, call Tri-State today at 928-872-1737 to speak to one of our team members.

Cylinder Head Pressure Check


Pressure testing is the best method of testing for cracks because cracks in areas that are not visible can still be found.

Bore and Hone Engine Block


Our automotive machine shops uses special equipment to bore the block over-sized and hone the surface of the cylinder wall.

Cylinder Head Surfacing


Compared to most automotive machine shops, Tri-State does not use belt sanders to surface the cylinder head. But instead, we use a CBN surfacer that is necessary to meet the tight tolerances required by today's engines.

Crankshaft Grinding


When a crankshaft is turned to an undersize, it can and does change the stroke and degrees apart of each rod journal. To index a crank, first the machinist has to know where the stroke and degrees (swing) are. Once this is established, with the right machine to start with, the crankshaft can be indexed for both swing and stroke. Crankshafts that are ground to within +or- .0001 (that's one ten thousands of an inch) on rods and mains gives you a crankshaft that will give you full bearing contact with a lot longer life. If you want more strength and longevity from your engine this is a must.

Crank Kits


Crank Kit includes a new or re-ground crankshaft, rod and main bearings with thrust washers.

Engine Kits


All of our engine kits come with name brand high quality components. If you need an engine master kit, re-ring kit, cam kit, or block kit, please call us today.

Short Blocks


All of the engine block sub-assemblies consisting of all of the related internal components are rebuilt and installed. The short block engine is normally just the rebuilt block containing pistons with rings and a crankshaft kit with bearings a new cam shaft.

Long Blocks


Consists of cylinder block fitted with pistons, rings, connecting rods, crankshaft and all bearings, cylinder heads, camshaft, timing chain, belt and/or sprockets.

Frequently Asked Questions

What machine shop services do you offer?

We offer crankshaft grinding, valve jobs, engine block bore and hone, cylinder head surfacing, MagnaFlux testing, and complete engine machining services.

Do you work on diesel and gas engines?

Yes, we service both gas and diesel engines for automotive, marine, industrial, and performance applications.

Do I need an appointment for machine shop services?

Appointments are recommended to ensure timely service, but walk-ins are welcome depending on workload.

Which areas do you serve?

We serve customers across Arizona, Nevada, and California, including Bullhead City and surrounding areas.

Request Information or Book an Appointment

Tri-State Engine is your one-stop shop for engine re-manufacturing service. With our in-house, state-of-the-art machine shop and installation services, we meet all of your auto and truck engines needs.

We Have the BEST Prices and the BEST Warranties in the Business!

Hours of Operation

Monday - Friday from 9 A.M to 5 P.M