J & M Machine in Oklahoma City: Precision Engine Work and Machine Shop Services

J & M Machine is a full-service machine shop and engine specialist on the south side of Oklahoma City that handles custom fabrication, engine rebuilding, and precision machining for automotive, industrial, and racing applications. The operation runs deeper than typical general repair shops, offering capabilities most transmission and brake specialists do not have in-house, which makes it a direct alternative to sending work to distant specialty vendors or waiting weeks for outsourced machine work.

What J & M Machine actually does

The shop focuses on engine machining and custom fabrication rather than routine maintenance. Common work includes cylinder head porting, boring and honing, crankshaft grinding, block machining for performance builds, and fabrication of custom brackets and adapters. The facility supports both street and racing engines, serving individual rebuilders, performance shops, and small manufacturers. Unlike a general auto repair shop that might refer you elsewhere for machine work, J & M handles the specialized tasks in-house, which shortens turnaround time and keeps the work under one roof.

Services and pricing

J & M Machine charges labor at $65 to $85 per hour depending on the complexity of the task, with pricing verified during initial consultation. A basic cylinder head port job typically ranges from $300 to $800; engine block boring and honing starts around $400 and scales with bore size and finish requirements. Crankshaft grinding costs $150 to $400 per shaft. Custom fabrication work is quoted on a per-project basis after assessment. The shop does not publish fixed menus, as jobs are highly variable. Call to describe your engine or component and request a detailed estimate before committing. Some shops in the Oklahoma City area, like those affiliated with larger transmission chains, outsource machine work to regional vendors; J & M eliminates that step and cost markup, though turnaround may be slower during peak racing season.

How it compares to other Oklahoma City auto repair options

General service shops and quick-lube centers cannot perform machine work without outsourcing, which adds 1 to 3 weeks to the timeline and a markup of 15 to 25 percent. Dealerships occasionally handle basic machining for factory engine rebuilds but rarely offer the custom or performance-oriented work J & M provides. Independent shops that specialize in performance builds (such as those focused on hot rods or racing engines) often partner with J & M or similar shops rather than machine in-house. If you are rebuilding a common engine and need only standard machine work, a regional engine rebuilder may offer lower labor rates; if you need precision porting, custom fabrication, or work on unusual blocks, J & M's in-house capability and local responsiveness justify the visit.

Who should use J & M Machine and who should not

Choose J & M if you are rebuilding an engine, porting a cylinder head, fabricating a custom part, or supporting a racing project. The shop suits weekend enthusiasts, professional rebuilders, and small shops that need reliable, local machine work without markup delays. Do not use J & M for oil changes, tire rotation, brake pads, or routine diagnostics; those belong at a general shop or quick-lube. If you need a same-day part and are not willing to wait 3 to 5 business days, call first to confirm availability, as turnaround is work-dependent and the shop does not maintain a walk-in parts counter.

First visit and what to expect

Bring the component or engine you need machined, or photographs and measurements if the item is large or installed. Describe the intended use (street engine, racing, industrial application) and any performance goals. The staff will assess the part, discuss options, and provide a detailed estimate. Payment terms and deposit requirements vary by job size; confirm these details when you receive the quote. Turnaround is typically 5 to 10 business days for standard work, longer during racing season or for complex custom jobs.

Hours, location, and logistics

J & M Machine operates Monday through Friday, 8:00 a.m. to 5:00 p.m., and is closed weekends. The shop sits in an industrial area south of downtown Oklahoma City with standard parking. Verify current hours by calling ahead, as seasonal demand for racing work occasionally shifts schedules. The shop does not offer mobile service; you must visit in person or arrange shipping for remote work.

J & M Machine fills a gap in Oklahoma City's automotive ecosystem by keeping specialized engine and fabrication work local, reducing costs and wait times compared to regional outsourcing.