If It's Diesel, We Do It.
DIESEL SPECIALISTS, LTD
Serving the Houston area since 1983.
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Diesel Engine Overhaul, Rebuild & Refurbishment in Houston, TX
When an engine reaches the end of a repair cycle, a full diesel engine overhaul or rebuild is often the most cost-effective path to restoring reliable service life. Diesel Specialists, Ltd is one of Houston's most experienced diesel engines rebuild shops, with more than 40 years of rebuilding and refurbishing diesel engines for industrial plants, oil & gas operations, construction fleets, equipment rental companies, and commercial operators across the Texas Gulf Coast.
Call (281) 446-1230 for a Diagnostic Appointment
If It's Diesel, We Do It.
Need High Quality Diesel Parts?
Diesel Engine Overhaul, Rebuild & Refurbishment
Top-End Overhaul
A top-end overhaul addresses the cylinder head, valves, and gaskets without disassembling the lower block. This is appropriate when compression is poor, oil consumption is high, or head-related failures occur but the crankshaft and lower rotating components are within specification.
Full Engine Rebuild
A full diesel engine rebuild involves complete disassembly, precision measurement of all components, replacement of worn parts to OEM specification, and reassembly. An in-frame rebuild is performed with the engine remaining in the equipment chassis; an out-of-frame rebuild removes the engine for full bench disassembly. We recommend out-of-frame rebuilds for the most thorough results.
Engine Refurbishment
Engine refurbishment falls between a repair and a full rebuild targeted replacement of high-wear components such as bearings, seals, gaskets, and injectors, combined with cleaning and inspection, to extend engine service life without a complete teardown. This is a cost-effective option when core engine components remain within tolerance.
Signs Your Diesel Engine Needs an Overhaul or Rebuild
Compression readings below OEM minimum across multiple cylinders
High oil consumption that persists after seal and gasket repairs
Excessive crankshaft bearing clearances confirmed by inspection
Repeated failures of the same components within short intervals
Engine has reached or exceeded its rated overhaul interval (hours or miles)
Major mechanical failure such as a thrown rod, spun bearing, or seized piston
Cost of ongoing repairs is approaching or exceeding rebuild cost
Our Engine Rebuild & Overhaul Services
Our shop handles the full spectrum of diesel engine repair services from targeted fixes to complete diesel engine rebuilds.
Complete Disassembly & Cleaning
Every component is disassembled, cleaned, and freed of carbon deposits, sludge, and contamination before measurement begins.
Precision Measurement & Inspection
Bore gauges, micrometres, and surface plates are used to measure cylinder bores, crankshaft journals, rod bores, and valve seats against OEM specifications. All measurements are documented.
Machine Shop Work
Cylinder boring and honing to accept oversized pistons or return to OEM bore
Crankshaft grinding, polishing, and undersize bearing fitting
Connecting rod reconditioning and small-end bushing replacement
Cylinder head resurfacing, valve seat grinding, and guide replacement
Flywheel resurfacing and balancing
Component Replacement
Pistons, rings, and liners
Main and rod bearings
Camshaft and lifters
Timing components — gears, chains, tensioners
All gaskets, seals, and O-rings
Injectors, injection pump (as needed)
Water pump, thermostat, and cooling system components
Reassembly & Engine Run-In
Reassembly follows OEM torque specifications throughout. Post-rebuild run-in procedures are performed per engine manufacturer guidelines to seat rings and verify all systems operate correctly.
Diesel Engine Overhaul Process
Engine Drop-Off & Initial Assessment
Full Disassembly & Cleaning
Precision Measurement & Condition Report
Rebuild Estimate & Authorization
Machine Shop Work (In-House)
Component Procurement & Replacement
Reassembly to OEM Torque Specifications
Run-In, Load Test & QA Verification
Documentation & Warranty Issue
Engine Brands We Rebuild & Overhaul
Our engine builders have hands-on rebuild experience across major diesel engine platforms used in industrial, construction, fleet, and power generation applications:
Perkins — 1000, 1100, 1300, 2200, and 2800 series
Deutz — air-cooled and liquid-cooled industrial series
Isuzu — 4BG1, 6BG1, 4HK1, 6HK1, and industrial variants
John Deere — PowerTech and Interim Tier 4 series
Yanmar — 3TNV, 4TNV, and marine/industrial series
Kubota — D, E, V, and industrial series
Caterpillar, Cummins, Kohler, Detroit Diesel — select models
Call us with your engine model and serial number if you do not see your brand listed.
Why Trust Diesel Specialists for Engine Diagnostics?
40+
Years in Service
4.3★
100+ Reviews
1983
Founded in Houston
12+
Brands Serviced
Customer Reviews
Frequently Asked Questions (FAQs)
A full out-of-frame rebuild typically takes one to three weeks depending on engine size, parts availability, and the extent of machine shop work required. We provide a realistic timeline as part of the rebuild estimate.
All Diesel Specialists rebuilt engines carry a standard workmanship and parts warranty. Specific terms are documented on your rebuild order and provided at time of delivery.
In many cases, yes. We source OEM-equivalent parts through established aftermarket suppliers and apply in-house machine shop work to bring components back to serviceable specification. Contact us with your engine details.
Professional Associations
Diesel Specialists Ltd is a proud member of the
Chamber of Commerce. See our listing.
VISIT US
DIESEL SPECIALISTS, LTD
Humble, TX 77396
Phone: 281-446-1230
Fax: 281-446-1890
If It's Diesel, We Do It.
From Parts to Repairs,
We've Got You Covered.
Certified. Reliable. Proven.
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