If It's Diesel, We Do It.

DIESEL SPECIALISTS, LTD

Serving the Houston area since 1983.

If It's Diesel, We Do It.

Diesel Engine Repair & Services

Diesel Specialists, LTD keeps your industrial engines and generators running strong in Humble & Houston, TX—expert diagnostics, repairs, overhauls, OEM parts, and preventive maintenance to cut downtime and extend service life.

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Engine Repair & Overhaul

We diagnose, repair, and overhaul industrial diesel engines and generators with documented processes that restore power and reliability. From electronic controls to hard parts, our technicians handle quick fixes and full in-frame or complete rebuilds with post-repair validation when appropriate.

What We Do

Electronic diagnostics & testing
In-frame and complete rebuilds
Fuel system service & calibration
ECM programming/updates
Post-repair run-in; optional dyno verification

Diesel Machine Shop

Precision machining under one roof means tighter quality control and faster turnarounds. We inspect to OEM specifications and document every step to ensure dependable results.

Capabilities

Cylinder head reconditioning & pressure testing
Flywheel resurfacing & balancing
Block boring & sleeve installation
Line boring
Crankshaft grinding & polishing
Connecting rod reconditioning
Measurement to OEM specifications

On-Site Service & Mobile Repair

When equipment can’t come to us, we come to you. Our stocked service trucks dispatch from Humble for diagnostics, minor repairs, and scheduled PM visits that keep stationary units and generators ready.

Field Support

Troubleshooting & minor repairs on location
PM visits for stationary units & generators
Generator exercising and verification under load
Scheduled route service available

For urgent issues during work the day or after hours call: (281) 446-1230.

Parts Sales & Support

Get genuine OEM and quality aftermarket components with experienced counter support. We stock common service parts and can source hard-to-find items fast.

Brands We Support

DEUTZ, Isuzu, John Deere, Kubota, Yanmar, JCB, and FPT, Rhelko (Kohler)

What's In Stock

Filters, injectors, pumps, gaskets, sensors
Hard-to-find/obsolete sourcing through our network
PM parts and technical ID assistance

Preventive Maintenance (PM)

Planned inspections, fluids/filters, and documented checks keep fleets and facilities on schedule. We tailor PM to your operating hours and compliance requirements to prevent downtime and extend asset life.

Program Highlights

Scheduled service programs
Load/exercise guidance for standby units
Oil/fuel/coolant condition checks
Maintenance records for your files

Who We Serve

We support organizations that rely on ready-to-run equipment. Programs are built for uptime, documentation, and safety.

Program Highlights

Fleets – Specialized diesel equipment that must stay ready; repair and PM plans that reduce surprise downtime.
Facilities & Plant Maintenance – Standby generators and industrial engines for buildings and process sites; clear documentation for your records.
Rental & Service Companies – Reliable turnarounds so your equipment is returned to generating revenue faster.
Construction & Industrial – Engines and components prepped for harsh sites—cooling, fueling, and sealing done right.
Healthcare & Critical Operations – Documented, OEM-compliant service performed under your AHJ/site protocols to keep you inspection-ready.

Coverage Area

Our shop is in Humble, TX (1215 Carpenter Rd., Humble, TX 77396). We serve Houston and most projects within ~100 miles, including Spring, The Woodlands, Kingwood, Atascocita, Baytown, and surrounding communities across Harris, Montgomery, Fort Bend, Brazoria, Galveston, Liberty, Chambers, and Waller counties.

Need directions or a map? See our Contact page for the map and details.

Why DSL

Since 1983, we’ve combined local stability with certified technicians, in-house machining, OEM parts access, and documented processes—backed by post-repair verification when appropriate.

Program Highlights

Serving the Greater Houston area since 1983.
Authorized OEM Dealer, factory-trained technicians & factory support.
ASE-certified diesel technicians with ongoing factory training.
In-house machine shop for heads, flywheels, and other rotating assemblies precision machined and inspected.
Multi-brand expertise across major industrial platforms with expert parts support.
Modern electronic diagnostic systems and documented procedures.
Customer-focused estimates, regular updates, and clean close-out documentation.
Post-repair run-in and optional dyno testing.
Safety-first with task-specific PPE, zero-energy LOTO, site-rule compliance.