M & R Machine Shop

At M & R Machine Shop, we take pride in being a leading automotive and diesel machine shop in Greencastle, Indiana. With a rich history dating back to 1949, we have been serving our community with excellence and precision. Our state-of-the-art facility is equipped with high-quality machines and a team of experienced professionals who are dedicated to delivering top-notch services.

Our story began with a simple yet profound vision: to provide our customers with the best possible solutions for their engine needs. Over the years, we have grown and evolved, but our commitment to excellence has remained unwavering. Today, we are proud to be a trusted name in the industry, serving customers from all walks of life, from amateur racers to heavy-duty diesel engine enthusiasts.

Our Services

As a full-service machine shop, we offer a comprehensive range of services designed to meet the unique needs of our customers. From OEM stock engines to competition racing engines, performance diesel engines, and heavy-duty diesel engines, we have the expertise and resources to handle it all. Our services include:

• Gas or diesel cylinder head rebuilding
• Competition multi-angle valve jobs
• Port and polish cylinder heads
• Valve guide honing
• Block blueprinting
• Thermal cleaning system
• Line honing/line boring mains
• Computer balancing crankshafts
• Crankshafts grinding
• Milling of heads and blocks
• Boring cylinders
• Honing cylinders with or without torque plates
• Two-stroke cylinder boring and honing
• Connecting rod reconditioning
• Flywheel grinding
• Pressure testing of heads and blocks
• Custom aluminum welding
• Cast iron welding
• Press work
• Engine assembly
• Competition engine assembly

Our Commitment

At M & R Machine Shop, we are committed to providing our customers with exceptional service, unparalleled quality, and prompt turnaround times. We understand the importance of getting your engine back on the road or track as quickly as possible, and we work tirelessly to ensure that every project is completed to perfection. Our team of experts takes pride in their work, and we stand behind every engine that leaves our shop.