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Precision Diesel Machining — home (937) 394-2150
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What we offer

Fifteen ways to put dependable power back to work — for automotive, agricultural, heavy-duty truck and industrial applications. Every service is delivered by specialists, to specification.

Two assembled cylinder heads with valve springs and retainers installed, resting on a wooden bench.
§Assembled cylinder heads, ready to go back out
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 →07Line boringBearing tunnels machined to correct diameter and alignment.View process →08Connecting rod reconditioningRods resized to correct bore size, roundness and centre-to-centre distance.View process →09Align boringCaps precision ground, torqued and re-machined to true alignment.View process →10Block resurfacingMilled with ceramic or titanium-carbide tooling for optimum surface finish.View process →11Thermal & hot-tank cleaningClosed-loop, self-contained cleaning systems.View process →12Pressure testingHeads sealed, immersed, pressurised and inspected for leaks.View process →13Magnaflux inspectionMagnetic-particle detection of radial and axial fractures.View process →14Cleaning & degreasingRust-inhibitive detergent wash after every machining process.View process →15Flywheel grinding & press workSingle and multiple-step flywheels, brake drums and rotors.View process →

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