Engine rebuilding

We perform all types of machining work for engine rebuilds and modifications, on American V8s, Japanese inline-fours, European performance engines, and everything in between. If it has a combustion chamber, we know what to do with it.

The block

The engine block is where everything starts. We bore and hone cylinders to exacting tolerances, deck block surfaces for a perfect seal, and perform line boring when the main bearing housing needs to be brought back into spec. Every block that comes through gets measured, assessed, and machined to the tolerances the build demands.

WHY CHOOSE BLENCO?

We combine experience, precision, and hands-on craftsmanship in every job. Each component is measured, machined, and checked with care. The result is work built to perform and last.

Boring-video

Fredde bores the cylinders on a 5.2" bore spacing block with fresh sleeves installed, running a 4.9" bore, on this Dart billet Chevrolet big block build.

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Honing-video

Honing the cylinders on a Dart Billet Big Block to achieve the correct surface finish, allowing the piston rings to seat and seal properly.

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Decking-video

Fredde decks the cylinder head surface on an Audi 5-cylinder block, creating a flat and accurate sealing surface for the cylinder head.

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Cylinder heads

Cylinder heads are measured, inspected and reconditioned according to their condition and intended use. Our work includes resurfacing, valve and valve-seat machining, and other machining required to restore sealing, geometry and function.

Rotating assembly

The crankshaft, rods, and rotating mass determine how an engine feels and how long it lasts. We grind crankshafts, recondition connecting rods, press-fit pistons, and balance the entire rotating assembly. We also perform Magnaflux crack testing on crankshafts and critical components.

Cleaning and inspection

Before anything gets machined or assembled, we have the machine to get it cleaned and inspected. We can blast and clean engine components, pressure test blocks, heads, exhaust manifolds, and oil coolers, and Magnaflux inspect for cracks that aren't visible to the naked eye.

Piston Ring Gap Filing

Clearances throughout the rotating assembly have a major effect on both performance and reliability. We prepare and inspect pistons, connecting rods, crankshafts and related components according to the requirements of each build.

Piston ring end gap is one of those small details that matters. Too little clearance and the ring ends can close up as the engine reaches operating temperature. Too much clearance compromises cylinder sealing.

Piston ring gap filing
Fredde files the piston ring gaps to spec. Too small and the rings can bind as the engine heats up. Too large and you lose compression and sealing.

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Precision machining. Proven experience. Built for performance.

We also source and supply replacement engines and cylinder heads when a rebuild isn't the right answer. If you're not sure which direction makes sense for your engine, that's exactly the kind of conversation we're built for.

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