BRM's Flexible Honing, Surface Finishing, and Deburring Blog Blog

BRM's Flexible Honing, Surface Finishing, and Deburring Blog

BRM's Flexible Honing, Surface Finishing, and Deburring Blog is the place for conversation and discussion about how to solve difficult finishing problems. For over 50 years, Brush Research Manufacturing (BRM) has helped customers use brushing technology to clean, rebuild, and resurface components ranging from engine cylinders to brake rotors to flywheels to firearms. BRM's Blog on CR4 provides real-world examples of how flex hones and wire brushes work. It also evaluates related technologies and invites questions from the community.

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Surface Finishing and Engine Restoration

Posted March 05, 2013 10:23 AM by Brush Research

MGB sports cars are diminutive roadsters that were built in Britain and especially popular in the U.S. Named after Morris Garages, a car dealer and automotive designer, the MG Car Company manufactured more than 500,000 MGBs from 1962 to 1980. Except for the V8 version, all MGB automobiles featured the BMC B-series engine, a straight-4 built by the Austin Motor Company.

Engine Restoration and Rebuilds

Today, some MG owners buy conversion kits and replace their roadster's original powerplant with a more powerful crate engine. MGB purists, however, adopt a different do-it-yourself (DIY) approach - the engine rebuild. For Sports Car Services, a repair shop that rebuilds British sports cars in a six-bay barn, restoring an MGB engine means using the Flex-Hone tool from Brush Research Manufacturing (BRM).

Why Ball Hones are Better

Last fall, Sports Car Services started work on a ring and valve job at its auto shop in rural Westminster, Vermont. After boxing the head, a mechanic named Warner used a ridge reamer, dropped the oil pan, and removed the piston and connecting rods. The engine restoration specialist then ball honed each cylinder with BRM's Flex-Hone tool, imparting a uniform surface finish that, in Sports Car Services' own words, "is simply unobtainable with conventional rigid-stone tools".

Flexible Honing for Engine Cylinders

Built with a stiff metal stem and flexible nylon filaments, the Flex-Hone produces the optimum surface finish in any type or size cylinder. Used by car mechanics and the automotive industry alike, BRM's versatile honing tool is ideal for engine block restoration, cylinder deglazing, and auto parts deburring. As Sports Car Services explains, "because the globules of abrasive are suspended on nylon filaments, the tool conforms to the shape of worn cylinder bores".

Plateau Finishing

Self-centering and self-aligning to the bore, BRM's cylinder honing tool is also self-compensating for wear. By reducing the peaks produced by prior machining operations, the Flex-Hone tool produces a substantially flat or plateau finish, allowing piston rings to seat properly. The unique cross-hatch pattern that flexible honing creates also aids in lubrication control and retention. Additional benefits include less blow-by and less friction.

What's Your Automotive Application?

"Flex-Hones are both the world's most sophisticated cylinder wall prep tools and arguably the easiest to use," Sports Car Services explains. Are you an engine builder or an automotive restoration specialist? Do you use the Flex-Hone tool for cylinder wall deglazing? Let us know by commenting on this blog entry.

Author's Note: This CR4 blog entry originally appeared in BRM's Flex-Hone Blog.

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Power-User

Join Date: Mar 2011
Posts: 259
Good Answers: 6
#1

Re: Surface Finishing and Engine Restoration

03/06/2013 9:00 AM

I'm not convinced.

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Power-User

Join Date: Aug 2012
Location: Mono,Ontario, Canada
Posts: 144
Good Answers: 1
#2

Re: Surface Finishing and Engine Restoration

03/06/2013 10:38 AM

MG NEVER made or installed a V8- that was strictly aftermarket

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