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Precision Diesel Machining — home (937) 394-2150
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Line boring

Bearing tunnels are precision machined to correct diameter and alignment.

The process

Line boring

All parts in need of line boring first have the caps precision ground. After cap grinding, all caps are returned to the engine block or cylinder head and torqued to the correct tension. The bearing tunnels are then precision machined to correct diameter and alignment.

PDM's boring machine is fully tooled to rectify main bearing and cam bearing tunnel irregularities.

—Where this sits

Stage 02 — precision machining

  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.

→More from the shop

Also machined here.

01Align boringCaps precision ground, torqued and re-machined to true alignment.View process →02Block resurfacingMilled with ceramic or titanium-carbide tooling for optimum surface finish.View process →03Thermal & hot-tank cleaningClosed-loop, self-contained cleaning systems.View process →

All fifteen services →

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