Business Details
50+ Years
experience
Trusted Automotive & Diesel Engine Repair Services in Greencastle, IN
M & R Machine Shop has served the automotive and diesel engine community since 1949, establishing a legacy built on precision and customer-centric values. Our team combines decades of hands-on experience with state-of-the-art machinery to deliver unmatched engine rebuilding and machining solutions. Owner Jason Myers, with over 25 years as an automotive machinist and engine builder, leads our commitment to excellence, ensuring every project meets rigorous quality standards. Relocated to Greencastle, Indiana in 2012, we expanded our capabilities to better serve clients specializing in OEM stock engines, competition racing engines, and heavy-duty diesel applications.Our expertise spans agriculture, industrial, motorcycle, ATV, and marine engines, reflecting a dedication to diverse customer needs. By prioritizing innovation and technical mastery, we maintain our reputation as a trusted partner in engine performance and reliability. Every service, from cylinder head rebuilding to custom aluminum welding, is executed with meticulous attention to detail. This enduring focus on quality and customer satisfaction has solidified our position as a leader in the automotive machining industry.
Services
Cylinder Head Rebuilding
Competition Valve Jobs
Engine Blueprinting
Crankshaft Grinding
Custom Aluminum Welding
Block Line Honing
Cylinder Boring
Connecting Rod Reconditioning
Flywheel Grinding
Pressure Testing
Details
- Year established: 1949
Highlights and features
- Established in 1949, providing decades of automotive machining expertise.
- Owner Jason Myers brings 25 years of specialized engine-building experience.
- Relocated in 2012 to enhance customer service capabilities with modern facilities.
- Specialize in OEM, racing, and heavy-duty diesel engines for diverse industries.
- Equipped with advanced machinery for precision tasks like computer balancing crankshafts.
Services
Cylinder Head Rebuilding
Our cylinder head rebuilding service restores performance and durability to damaged or worn heads. We perform multi-angle valve jobs, port and polish work, and valve guide honing. This service ensures optimal airflow and combustion efficiency for automotive, racing, and industrial engines.
Engine Blueprinting
Engine blueprinting involves precise measurement and machining of engine components to exact specifications. This includes block line honing, milling, and crankshaft balancing. The process guarantees peak performance, reliability, and longevity for racing and high-performance applications.
Crankshaft Grinding
Crankshaft grinding restores worn or damaged crankshafts to factory specifications. Using advanced equipment, we ensure precise journal sizing and surface finish. This service extends component life while maintaining critical tolerances for smooth engine operation.
Custom Aluminum Welding
Custom aluminum welding addresses cracks and structural damage in engine components. Our skilled technicians use specialized techniques to repair intake manifolds, housings, and racing parts. This service maintains material integrity while restoring functionality.
Pressure Testing
Pressure testing identifies cracks or leaks in cylinder heads and engine blocks. We apply controlled pressure to detect flaws invisible to the naked eye. This diagnostic service ensures component integrity before and after machining processes.
People
Jason Myers
Owner
Jason Myers has over 25 years of experience as an automotive machinist and engine builder. He acquired M & R Machine Shop in 2003, continuing its legacy of excellence established in 1949.
Questions
What types of engines do you specialize in?
We specialize in OEM stock engines, competition racing engines, heavy-duty diesel engines, and applications for agriculture, industrial, motorcycle, ATV, and marine sectors.
How long has M & R Machine Shop been in business?
M & R Machine Shop has served customers since 1949, with owner Jason Myers leading since 2003.
What machining services do you offer?
Our services include cylinder head rebuilding, crankshaft grinding, engine blueprinting, custom aluminum welding, pressure testing, and precision boring/honing.
Are you open on weekends?
We operate Monday through Friday from 8:00 AM to 4:30 PM and are closed on weekends.
