Business Details
Your Trusted Automotive Machining Experts in Sunbury, PA
At MAPCO Machine Shop, we have dedicated ourselves to automotive machining excellence since the 1980s. Our journey began as part of Mertz Auto Parts Company, established over 50 years ago in Sunbury, PA, by Robert Bob and Richard Dick Mertz. Over decades, we evolved from a used truck parts salvage yard into a full-service machine shop, expanding our capabilities to include custom engine builds, driveshaft assembly, hydraulic hose fabrication, and U-bolt bending. Our team combines over 75 years of collective experience in engine machining and 25 years in driveline services, ensuring precision and reliability for industries ranging from racing to agriculture.We pride ourselves on delivering tailored solutions, whether for LS engines, carbon fiber driveshafts, or emergency hydraulic hose repairs. In 2016, ownership transitioned to Roy and Patsy Adams, who continue to uphold our commitment to quality and customer satisfaction. With a focus on innovation and adaptability, we serve as a trusted partner for hard-to-find parts and custom machining needs, valuing our customers' decades of support as we look toward the future.
Services
Engine Building & Rebuilding
Driveshaft Assembly
Hydraulic Hose Making
U-Bolt Bending
Engine Dyno Testing
Valve Jobs
Engine Head Surfacing
Crank Shaft Grinding
Custom Carbon Fiber Driveshafts
Fly Wheel Surfacing
Highlights and features
- 30+ years of automotive machining excellence
- Custom engine builds tailored to your application
- In-house driveshaft assembly and balancing
- Same-day U-bolt bending service available
- Over 75 years of combined experience in engine machining
Services
Engine Building & Rebuilding
Our engine builders combine over 75 years of experience to deliver custom engine builds for racing, agriculture, and industrial applications. We specialize in LS engines, Ultra4 off-road racing, and tractor pulling configurations. With capabilities like dyno testing up to 1600 HP, valve jobs, and crankshaft balancing, we ensure peak performance tailored to your vehicle's needs.
Driveshaft Assembly
We offer custom steel, aluminum, and carbon fiber driveshaft assembly and repair for UTVs to large trucks. Our balancing services cover single to three-piece shafts, ensuring optimal performance. With 25+ years of expertise, we cater to dirt circle track racing and heavy-duty transport industries, providing precision-engineered solutions for demanding applications.
Hydraulic Hose Making
As one of the few local providers, we fabricate and repair hydraulic hoses using Parker Hose & Fittings. Our extensive inventory allows rapid assembly of common sizes, minimizing downtime for leaking or damaged systems. We serve agricultural, industrial, and racing clients needing durable, high-pressure hydraulic solutions.
U-Bolt Bending
Our U-bolt bending service creates custom fittings while you wait, accommodating diameters from 3/8 to 1 inch. We produce square, half-moon, and full-round configurations for axles 2 to 6 inches wide. This rapid turnaround ensures minimal downtime for clients requiring specialized suspension and chassis components.
Engine Dyno Testing
We provide engine dyno testing and tuning up to 1600 HP, ensuring optimal performance and reliability. This service includes balancing, surfacing, and boring to enhance engine efficiency. Ideal for racing and industrial applications, our dyno testing validates custom builds before deployment.
Questions
What services does MAPCO Machine Shop offer?
We specialize in engine building/rebuilding, driveshaft assembly, hydraulic hose fabrication, U-bolt bending, and engine dyno testing. Additional services include valve jobs, crankshaft grinding, and carbon fiber driveshaft production.
How long has MAPCO been in business?
Our parent company, Mertz Auto Parts, began over 50 years ago. We established our machine shop division in the 1980s, evolving into the full-service automotive machining provider we are today.
Do you offer custom or specialized parts?
Yes, we focus on custom solutions. Our services include tailored engine builds, carbon fiber driveshafts, and same-day U-bolt bending to meet unique specifications for racing, agriculture, and industrial clients.
What industries do you serve?
We support racing (Ultra4, drag, circle track), agriculture, excavation, transportation, and industrial sectors. Our clients range from individual racers to commercial fleet operators requiring durable, high-performance components.
How quickly can you complete urgent projects?
Our U-bolt bending service operates while you wait. Hydraulic hose assembly and minor engine repairs typically complete within hours. Larger engine builds or driveshaft projects require consultation for timelines.
