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Precision Diesel Machining — home (937) 394-2150

Precision Diesel Machining · Sidney, OH

Built on experience.
Measured by precision.

Full-service engine rebuilding for automotive, agricultural, heavy-duty truck and industrial work across Western Ohio.

(937) 394-2150 or request a quote →
Journal runout & taper±0.0001″
Years rebuilding engines30+
Workmanship warranty90 DAY
Services15
02What we offer

Fifteen services. One standard.

From a single valve job to a complete rebuild — every part is inspected carefully, machined precisely, and restored to meet or exceed original manufacturer specifications.

01Complete cylinder head rebuildingValve jobs with 3-angle seats, precision-ground valves, clean-room assembly.View process →02Engine block rebuildingBore, deck and hone indexed to a true deck-to-cylinder-to-main relationship.View process →03Engine assemblyAssembled by a specialist in a dedicated clean room, isolated from the shop floor.View process →04Complete engine rebuildsTeardown to assembly, with premium first-line parts and gaskets.View process →05Boring & honingCorrect cylinder wall finish and crosshatch for ring break-in and oil film.View process →06Crankshaft grinding & polishingJournals held to ±0.0001″ runout and taper — often no detectable deviation.View process →

All fifteen services →

03Our process

Three stages. Dedicated areas.

From shop design to machine selection, PDM is structured around the three critical stages of rebuilding — so engines move through each with the care, cleanliness and accuracy they require.

  1. 01
    Teardown & cleaning

    Complete disassembly, thermal and hot-tank cleaning, and inspection before any metal is cut.

  2. 02
    Precision machining

    Boring, honing, grinding and align boring — every cut indexed to a true relationship.

  3. 03
    Final assembly

    Careful assembly in a dedicated clean room, isolated from the rest of the operation.

Runout & taper, held
±0.0001″
  • Magnaflux magnetic-particle inspection
  • Pressure testing
  • Closed-loop, self-contained degreasing
  • Dedicated assembly clean room
  • Premium first-line parts & gaskets
  • Delivery & pickup on established routes
Limited warranty
90 DAY
On workmanship
5,000 MI

We stand behind the workmanship performed in our shop. Engine components are covered by applicable manufacturer warranties — contact a PDM representative for complete limited-warranty details.

Put dependable power back to work.

One call. Same-day answers. (937) 394-2150
or
Request a quote