If It's Diesel, We Do It.

DIESEL SPECIALISTS, LTD

Serving the Houston area since 1983.

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

REQUEST SERVICE NOW!

Verified, Trusted & Certified.

If It's Diesel, We Do It.

Call (281)-446-1230

Need High Quality Diesel Parts?

Get My Parts Quote

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

Call us at (281) 446-1230 for a free quote

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

★★★★★

"Whole crew at diesel specialist are amazing go above and beyond!! Get service especially Miriam always so sweet and kind and Debbie and Delbert as will to help bravo!!!"

Alfredo Ortiz

★★★★★

"Great experience with Diesel Specialist LTD. Everyone was really nice, professional, and helpful. They worked fast and didn’t waste time."

Maricela Razo

★★★★★

"I had ordered a few parts that my dad needed and whenever I had to pick them up, Miriam was there and let me just say, she was VERY helpful, attentive and super friendly!"

Julissa Garcia

★★★★★

"Absolutely amazing people. They go above and beyond! Thank you Diesel Specialist"

D Bolden

★★★★★

"I do a lot of business with diesel specialist and they always put you first and have the kindest front desk personal"

Nick Foster

★★★★★

"Ana is the greatest when it comes to any of our needs!! Diesel Specialists is the go to place for any Diesel needs. We drive all the way from Beaumont area to have our diesel needs taken care of!"

Dean Thompson

★★★★★

"They have extensive knowledge and offer all their expertise to help you with whatever you need; they have good parts"

Julio Maldonado

★★★★★

"Mr. Leo IV has always gone above and beyond, Diesel specialists is the place to go!!"

Charles Skelly

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.