BHJ manufactures Honing Plates and Cylinder Head Torque Plates to fit more than 400 engine applications in all sizes, from single-cylinder to V-12s and is recognized worldwide as the authority in honing plate development and production today. Since the conception of the initial honing plate designs that were introduced by BHJ Products in early 1975, continued research and development has brought numerous design improvements that bring us to the models available today.
Head-bolt torque can dramatically distort cylinders and cylinders can not be bored or honed accurately if cylinder dimensions change so significantly after assembly. Rings won't seal well and scuffing is likely to occur if the engine overheats. Use of BHJ honing plates rectifies all of these problems, leading to more consistent tolerances, better sealing and more power.
Honing Plate Standard Features:
- 1-3/4" thick Meehanite Cast Iron or Aluminum Tooling Plate give maximum rigidity and resistance to permanent distortion and most closely simulate the stresses induced on the cylinder wall by the cylinder head when it is torqued in place. In addition, these materials have essentially the same coefficient of expansion as cylinder heads, important to those honing at operating temperature.
- Cast Iron Plates are Blanchard ground on both sides flat and parallel within precision commercial tolerances.
- Aluminum R Model Plates are supplied with heat-treated steel inserts (T-Washers) in all bolt holes standard.
- Most plates are manufactured with .090" larger bore size than the largest standard engine bore diameter found in the engine family in most applications, allowing the honing plate to accommodate .060" over-bore. This maintains full gasket firing ring compression, thus further enhancing bore distortion. Special bore diameters are available upon request. (See Options & Special Order Plates).
- Head-bolt holes are precision machined to factory tolerances and special bolt hole sizes are also available.
- Clearance holes for locating dowels are machined over-size to allow visual alignment before torquing.
- Indexed or "Dialed In" dowel holes are also available upon request.
- All Honing Plates are shipped in a durable, protective Wooden Case.
Contact us to order options and plates not shown on this website. Many aftermarket and racing block/cylinder head applications are only available by phone, or email order, to facilitate custom dimensions typically found in those combinations. Click here for information on Options & Special Order Plates.
Click here for a current list of Honing Plate engine applications. Many of the applications listed are special order by phone, or email only and are not currently available on this website, as mentioned above.
