// Engines are our PASSION — QUALITY is our promise //
Rebuilt with precision.
Sold with pride.
What We Do
Machining & Rebuilding
// Cylinder boring, honing, decking, and sleeving
// Crankshaft grinding, polishing, and welding
// Cylinder head resurfacing and valve jobs (1–32 valves)
// Line honing and block cleaning services
// Cam bearing and freeze plug installation
// Engine disassembly and inspection services
Assembly & Builds
// Short block and long block assembly (gas & diesel)
// Custom engine builds for street or performance
// Valve adjustment and camshaft installation
// Rotating assembly balancing and pin crack repair
// Magnaflux and pressure testing available
// OEM and performance parts installation
Specialty Shop Services
// Broken bolt removal and heli-coil installation
// Flywheel and exhaust manifold resurfacing
// Rod reconditioning, piston installation, and checks
// Diesel machining: decking, sleeving, grinding
// Custom compression ratio and camshaft setups
// Specialty coatings, treatments, and welding
Engine Rebuilds and Machining You Can Trust
Looking for a reliable shop to rebuild your engine or handle your custom machining needs? You’re in the right place. Our locally owned and operated shop takes pride in delivering precision engine work and personalized service. Whether you need a full rebuild, head resurfacing, block machining, or custom parts, our experienced team is ready to get the job done right.
Frequently Asked Questions
// How long does an engine rebuild take?
Most rebuilds take between 1–2 weeks depending on parts availability and workload. We’ll give you a timeline when we inspect your engine.
// Do you work on both gas and diesel engines?
Yes! We work on gas, diesel, and even marine engines. No matter the platform, we’ve got the experience to handle it.
// Can I bring in just the head or crank?
Absolutely. We regularly machine individual parts like cylinder heads, crankshafts, and rods.
// Do you install engines too?
We specialize in machining and assembly. While we don’t do full engine installs, we can refer trusted partners in the area.
// Do you offer warranties?
Yes. All assembled long blocks and short blocks come with warranty options. We’ll walk you through the details when you request a quote.
Get in Touch
Whether you need a quick quote, want to drop off parts, or just have a few questions about our services, we’re here to help. Give us a call, shoot us an email, or stop by the shop — our team is always happy to talk engines. Let’s get your project moving.
740 N Main St, Smithfield, UT 84341 ( Located in Don's Marine )
435-760-4238
Opening hours
Mon - Friday : 9AM - 4PM
Saturday: 9AM - 1PM
Sunday: Closed
© KB Performance Machining 2025. All Rights Reserved.