If you do not have the necessary tools at hand or do not want to do honing yourself, the work can be entrusted to the specialists of a car service workshop for quite a moderate fee.
1. Before honing, reinstall the main bearing caps/connecting bridge (without inserts) and tighten the fixing bolts to the required torque.
2. There are two types of hone for processing cylinder mirrors: hone type «bottle brush» and, more traditionally, a surface hone in the form of a nozzle with spring-loaded whetstones. Both tools provide the necessary quality of processing cylinder mirrors, although the use of the first one is preferable for an inexperienced mechanic. You will also need a sufficient amount of rags, special honing or just liquid machine oil, as well as an electric drill as a drive for honing nozzles. Proceed in the following order:
- Clamp the hone in the chuck of the electric drill, bring the spring-loaded whetstones / rods of the nozzle brush and thread the latter into the cylinder.
Don't forget to wear safety goggles or a face shield!
- Abundantly moisten the mirror of the treated cylinder with oil, turn on the drill and start reciprocating movements inside the cylinder with the nozzle. The speed of the vertical movement of the hone should ensure the application of a mesh pattern on the surface of the mirror of the cylinder with an angle of intersection of the sides of the mesh of about 60°. Spare no oil and try not to remove more material from the surface of the cylinder walls than is really necessary to achieve the desired result.
Piston ring manufacturers may have their own requirements for the angle of intersection of the sides of the mesh pattern - carefully read the instructions on the package of the repair kit.
- Do not remove the hone from the cylinder before the drill stops completely! Continue to reciprocate the nozzle until it stops rotating. After stopping the drill, squeeze the whetstones and remove the hone from the cylinder. When using hone type «bottle brush» wait for the drill to stop completely, then remove the attachment while continuing to manually rotate the chuck in the normal direction.
- Wipe the cylinder mirror with a rag and proceed to honing the next one.
4. Upon completion of processing, use a file to chamfer the upper edges of the cylinders - this processing is carried out in order to avoid difficulties with filling pistons with rings put on them into the cylinders. Be extremely careful not to scratch the mirror of the cylinder with a needle file.
5. Finally, the entire unit should be thoroughly rinsed with a warm, soapy water solution.
The cylinders can be considered washed when, after passing a white cloth moistened with oil on the mirror, there is no gray coating left on it. Be sure to clean all oil holes and channels with a cylindrical brush, then flush the block with a high-pressure water jet.
6. After washing, dry the block thoroughly and coat the machined surfaces with oil to protect them from corrosion. Wrap the block in a clean plastic bag before assembling the engine.
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