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Block Machining and Boring

All of JNW Engine & Machine performance and racing engines that go through our machine shop go through a precision align bore and cylinder block honing process. This insures that rotating assemblies run true while the engine is operating. This process includes align hone the main bearings housing bore and the crankshaft straighten to .0002 ensure they run true and friction free as possible.

Rottler Bore Machine

Engine boring is at an angle not relative to the crankshaft, engine failure could occur. To prevent this, JNW Engines & Performance uses a carefully crafted quality control process. This process inspects all blocks for cylinder wall tapers, out of round diameters, cracks, camshaft and crankshaft misalignment. The magnitude of this process allows us to align the housing bore and honing be done by only a very experienced machine shop such as JNW Engine & Machine.

We Upgraded our cylinder bore honing machine to Rottler H85 CNC Controlled Honing.

Align line honing .

Align Hoining a 351W ford with probe main support.
Quality Control With Your Engine Is Our #1 Priority

At JNW Eninge & Machine Performance quality control is an important factor in our customer experience. Careful measures in checking and double checking clearances is our precedence in producing a fast, reliable engine that will bear our responsibility.

If you would like to discuss your application please give us a call 707-544-6988 from 9am to 5pmPST or click here to contact us