Truck Engine Repair, Rebuild & Overhaul Services in Seguin, TX

Heavy-Duty Engine Repair in Seguin, TX

When your engine loses power, overheats, or starts knocking, it’s more than inconvenient—it’s a direct threat to your business. At H&H Diesel Service, we specialize in heavy-duty diesel engine repair, rebuilds, and overhauls to restore your truck’s performance and reliability.

Our certified technicians handle all levels of diesel engine work, including:

• Cylinder head repairs and replacement
• Cracked block assessments and repairs
• Turbocharger diagnostics and rebuilds
• Fuel injection system diagnostics and repair
• Gasket, seal, and valve replacement
• Complete in-frame and out-of-frame overhauls
• Oil pan, camshaft, and crankshaft repairs
• Cooling and lubrication system service

Common signs you need engine work include hard starts, excessive smoke, low oil pressure, coolant loss, engine knocking, and decreased fuel efficiency. If you’re seeing any of these symptoms, don’t wait until it leads to a full breakdown—bring your rig in for a full diagnostic and honest repair plan.

Experience the H&H Difference

Certified Technicians with Real-World Experience: Our team includes factory-trained techs with certifications from PACCAR, Kubota, Terex, and National Crane—so your engine is in expert hands.

Rapid Turnarounds, No Shortcuts: With 6 bays and 8 full-time technicians, we complete complex engine repairs without the backlog. Whether you operate one truck or an entire fleet, we get you back on the road faster.

Full Transparency, Every Time: You’ll get honest diagnostics, clear communication, and pricing that respects your bottom line. We don’t upsell or overcharge—we do the work that’s needed, and we do it right.

Warranty-Backed Repairs: We stand behind every engine service with a 30-day workmanship warranty and full support for manufacturer part warranties. Your trust—and your uptime—matters.

Mobile Repairs: Can’t make it to the shop? We offer dependable roadside assistance and scheduled mobile repairs to a 25-mile radius of Seguin, TX.

Contact Us About Engine Repair Now: Call 210-332-5821!

If your diesel engine is struggling or has failed, don’t risk a roadside breakdown. Call 210-332-5821 now and speak with a technician at H&H Diesel Service. We’ll inspect your engine, explain your options, and get to work fast.

FAQs

What Areas Do You Serve For Heavy-Duty Engine Repair?

We’re located at 7310 I-H 10 West, Seguin, TX 78155, near the I-10 intersection. We also proudly serve San Antonio, TX; Lockhart, TX; Luling, TX; New Braunfels, TX; San Marcos, TX; Cibolo, TX; Schertz, TX; Marion, TX; McQueeney, TX; Geronimo, TX; New Berlin, TX; Santa Clara, TX; and Lake Dunlap, TX.

How Do I Know If My Engine Needs a Rebuild?

Look for signs like excessive oil consumption, white or blue smoke, loss of power, or metal shavings in your oil. If repairs won’t restore performance, a rebuild or overhaul may be the better long-term solution.

Can a Failing Diesel Engine Be Repaired or Does It Always Require Replacement?

Not all engine failures require full replacement. Many issues can be resolved with targeted repairs or a complete overhaul. Our diagnostics will determine the most cost-effective and reliable path forward.

How Can I Get Heavy-Duty Engine Repair?

Just call 210-332-5821 today. Our certified techs will run diagnostics, explain the issue, and rebuild or repair your engine to factory-grade standards. Fast, honest, and built to last—only at H&H Diesel Service.