Precision Machine Works in Oklahoma City: Engine Machine Work and Custom Fabrication for DIY Builders

Precision Machine Works operates as a full-service machine shop on the south side of Oklahoma City, handling engine block boring, cylinder head work, custom shaft fabrication, and component restoration for both automotive enthusiasts and professional rebuilders. The shop serves a specific clientele: people rebuilding engines at home or in small shops, racers needing precision tolerances, and shops without in-house machining capability who need reliable turnaround.

What Precision Machine Works actually is

This is not a general auto repair facility. Precision Machine Works specializes exclusively in machine work, meaning they bore cylinders, hone blocks, grind valve seats, align bore, and manufacture custom parts to specification. The operation requires CNC mills and precise measurement tools, which distinguishes it sharply from standard repair shops. They work on small-block and big-block V8s, LS engines, vintage inline sixes, and motorcycle engines. The shop also does custom fabrication, including shaft work and aluminum component machining. This is destination work: customers bring parts or engines to them rather than having their car serviced on site.

Services and pricing

Pricing varies by job complexity and material. A basic cylinder hone (preparing a stock bore for new rings) typically runs $75 to $150 per cylinder, depending on bore size and condition. Full engine block machining packages, including boring, honing, decking, and cleaning, range from $400 to $800 for a small-block core. Cylinder head work (valve seat grinding, chamber cleanup) costs between $50 and $150 per head depending on configuration. Custom shaft work and one-off fabrication are quoted individually. The shop does not publish a fixed price list online; customers are expected to call with specifications or bring cores in for evaluation. Turnaround on standard honing jobs is typically 5 to 7 business days; custom fabrication timelines depend on complexity. A diagnostic teardown fee may apply if the extent of work is unclear.

How it compares to other Oklahoma City machine shops

The Oklahoma City area has limited dedicated machine shops. Tulsa-based shops like Southwest Machine handle volume work but are an hour away, making Precision Machine Works the faster option for local builders who want to avoid hauling cores out of the metro. General automotive machine shops in OKC often subcontract precision work rather than doing it in-house, adding cost and delay. Dealerships and independent repair shops typically send engine work to outside vendors, which adds markup and extends timeline by weeks. For someone rebuilding an engine at home or running a small fabrication shop, having a machine facility within the city eliminates the logistics of shipping or long-distance travel.

Who it suits and who it does not suit

Precision Machine Works is for engine builders, hot rod and classic car enthusiasts, small-engine shops needing overflow capacity, and racers who require close tolerances. It is ideal if you are building an engine piece by piece, have a core that needs professional finishing, or need a custom component manufactured to drawing. It is not for someone with a broken-down daily driver seeking general repair; take that vehicle to an independent shop or dealership. It is also not a quick-service location. You are not walking in for oil changes or minor tune-ups. The shop operates by appointment and requires advance notice for most jobs.

What the first visit involves

Call ahead with your project details: engine type, bore size, condition of the core, and what finish you need. If possible, provide engine specifications or performance goals. If uncertain, bring the core in for a free or low-cost assessment. The shop will evaluate the block or head, measure bore wear or damage, and quote labor and any necessary material costs. Payment and timeline are confirmed before work starts. Most jobs require a deposit. You will need to either pick up the finished core yourself or arrange shipping, depending on your location and preference.

Hours, parking, and logistics

Precision Machine Works operates Monday through Friday, 8 a.m. to 5 p.m.; confirm current hours before visiting, as machine shops sometimes adjust for custom jobs or shut down for equipment maintenance. The facility has parking suitable for a truck and trailer. You will need to drop off and pick up your own work; they do not offer transport. If you are sourcing parts for an engine build, plan multiple visits or coordinate a single trip with other OKC suppliers.

Precision Machine Works fills a real gap for engine builders in the Oklahoma City region, offering in-house capability that eliminates wait times and middle-man costs inherent in shops that outsource machining.