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Engine · October 2026

How Long Does an Engine Rebuild Take? Gas & Diesel Timeline and Cost

C&D Automotive· Colorado Springs, CO

TL;DR: Most engine rebuilds at C&D Automotive take 2–4 weeks and cost $2,500–$6,000+, depending on engine size, condition and how much machine work it needs. The time goes into a full teardown, measuring every part against spec, machine work, and careful reassembly. Diesel rebuilds on Powerstroke, Cummins and Duramax engines follow the same process with platform-specific parts and checks.

Key Takeaways

StageWhat happens
DiagnosisConfirm the engine needs a rebuild, not a smaller repair
Teardown + inspectionBlock, head, crank, rods, pistons, valves and cam inspected and measured
Machine workBoring, decking, honing or head work at a qualified machine shop
PartsRings, bearings, gaskets and seals sourced for your engine
Assembly + break-inBuilt to spec, tested, then break-in instructions for you
Typical total2–4 weeks; $2,500–$6,000+

Why Does an Engine Rebuild Take Weeks, Not Days?

Because a real rebuild is measured, not just reassembled. Every major component comes out and gets checked against the manufacturer's spec before anything is reused. Bores, decks and valve seats that are out of spec go to a machine shop for resurfacing, boring or honing, and that work has its own queue. Parts are ordered once the measurements say exactly what the engine needs. Rushing any of those steps is how rebuilt engines come back. Details of each step are on our engine rebuild page.

What Makes a Rebuild Take Longer?

How Is a Diesel Engine Rebuild Different?

The process is the same, but each diesel platform has its own known weak points, and a good rebuild addresses them while the engine is apart. On Powerstroke engines (6.0, 6.4 and 6.7) that can mean head studs where warranted and a close look at the oil cooler; injector cup sealing matters across platforms. We rebuild Powerstroke, Cummins and Duramax engines, and our diesel repair team handles the related EGR, DPF and injector work. If your diesel is down on power rather than knocking, read why diesels lose power at altitude first; a rebuild is not always the answer.

Rebuild, Replacement Long Block, or Used Engine?

It depends on the engine, the failure and what the vehicle is worth. A rebuild keeps your original engine and lets us correct known problems. A remanufactured long block can be faster when one is available. A used engine is the cheapest up front and the biggest unknown. We walk you through the honest math for your specific vehicle before you choose, and the price goes in a written estimate before any work starts.

How Do You Know You Need a Rebuild?

Knocking from the bottom end, heavy oil consumption, low compression, coolant in the oil or metal in the oil pan are the usual signs. Many of them overlap with smaller problems, which is why every engine job starts with auto diagnostics. Our guide to engine warning signs covers what each symptom tends to mean.

From the Shop

Engine work is where shortcuts cost the most, because the internal parts are the hardest to get back to if something fails. Since 2019 we have done every rebuild the same way: full teardown, measure everything, machine what is out of spec, quality rings, bearings, gaskets and seals, and a written estimate before we start. Our ASE-certified techs will tell you plainly if a rebuild doesn't make sense for your vehicle.

Engine making noise or burning oil? Call or text (719) 618-4889, or request a free estimate.

Frequently Asked Questions

How long does an engine rebuild take at C&D Automotive? Most rebuilds take 2–4 weeks. The range depends on machine shop scheduling, parts availability, and what the teardown finds inside the engine. We give you a realistic timeline with the written estimate and update you if anything changes.

How much does an engine rebuild cost in Colorado Springs? Engine rebuilds at C&D Automotive range from $2,500 to $6,000+ depending on engine size and condition, the machine work required, and parts. Diesel and performance builds often land toward the higher end. You get a written estimate before any work begins.

Is it worth rebuilding a high-mileage engine? Often, if the rest of the vehicle is in good shape. A rebuild resets the engine's wear parts and lets us fix known problems while it is apart. If the vehicle's value or condition does not justify it, we will tell you and compare a long block or used engine instead.

Can I drive my car while waiting for an engine rebuild? Usually not. Once a rebuild is approved the engine comes out for teardown, so the vehicle stays at the shop. If you are still deciding, we can tell you whether it is safe to drive in the meantime after diagnosing the problem.

Related reading: Engine Warning Signs · How Much Does Auto Repair Cost in Colorado Springs?

Related services: Engine Rebuilds · Diesel Repair · Auto Diagnostics

Have a question about your vehicle? C&D Automotive is at 1440 Pando Avenue, Colorado Springs, CO 80905. Mon–Fri 8am–6pm, Saturday 9:30am–4pm.

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