Industrial Diesel Engine Repair & Overhauls

Keeping your industrial equipment running is critical to your bottom line. Since 1983, Diesel Specialists, LTD. has been a trusted partner for industrial diesel engine repair across Greater Houston and the Texas Gulf Coast. Our certified technicians provide thorough diagnostics, professional repairs, and complete overhauls for major brands—so your fleet, generators, and heavy equipment get back to work with minimal downtime.

Verified, Trusted and Certified For Your Success.

Genuine OEM Parts

The Right Part, Right Away.
Need a part for your diesel equipment?

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Problems We Fix

When an engine falters, every hour matters. We quickly identify root causes and make durable repairs across the most common failure patterns.

Hard Starting & Power Loss

  • Fuel delivery and injector issues

  • Air intake restrictions or turbocharger concerns

  • Compression-related wear (rings/valves)

  • Starting system faults (glow plugs/starters on applicable engines)

Smoking & Overeating

  • White smoke (coolant intrusion/head sealing concerns)

  • Black smoke (over-fueling/air imbalance)

  • Blue smoke (oil consumption)

  • Cooling system leaks, pump/thermostat, radiator/intercooler concerns

Fuel & Electronic Systems

  • Fuel pump and filtration problems, contamination cleanup

  • ECM/sensor diagnostics and harness repairs

  • Emissions system troubleshooting on applicable industrial engines

Our Diagnostic & Repair Process

  • Inspection & Testing – Comprehensive visual checks and diagnostic testing to pinpoint the issue - not just the symptom.

  • Estimate & Timeline – A clear scope of work with parts and labor outlined, plus an ETA based on parts availability and current workload.

  • Repair or Overhaul – Work performed by trained technicians using OEM or equivalent components, with attention to long-term reliability.

  • QA Run-In – Post-repair verification and run-in procedures to confirm proper operation before delivery or release from the field.

Overhauls & Component Work

From component-level fixes to full rebuilds, we handle the critical systems that keep industrial engines working:

  • Injectors & Fuel Systems – Injector service/replacement, pump work, rail/line cleaning, contamination remediation.

  • Turbo & Cooling Systems – Turbocharger replacement/rebuild options, charge-air system checks, radiator/heat-exchanger service, water pumps.

  • Gaskets & Seals – Head, valve cover, oil pan, and full engine sealing packages appropriate to your application.

  • Sensors & Electronics – Sensor replacement/calibration and harness/connector repairs for modern industrial engines.

Brands & Power Units We Service

Primary brands serviced: Perkins, DEUTZ, Isuzu, John Deere, Yanmar, JCB, FPT Industrial, Kubota.
Also supported via our supplier network and experience: Cummins, Caterpillar, Detroit Diesel, Navistar, and other major industrial platforms.

Note: If you require brand-specific dealer work, tell us about your engine model/serial—we’ll advise the best path forward.

Machine Shop Advantage (In-House)

Having a full machine shop under the same roof improves quality control and can reduce turnaround:

  • Cylinder Heads & Valve Work – Reconditioning, valve/seat work, pressure checks.

  • Flywheel & Clutch Services – Flywheel surfacing/balancing, clutch component service.

  • Block, Rod & Crank – Boring/honing, connecting rod work, crankshaft polishing/grinding within spec

Warranty, Safety & Quality

Your repair is backed by our standard workmanship and parts warranty (details provided on your estimate/RO). Work is performed by trained technicians following industry-standard procedures and specs.

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