Step By Step Procedure to Make Reconditioned Cylinder Heads

The process that engineers and experts used to generate reconditioned cylinder heads is not very intricate. Several steps are to be taken in a very strict order and once this is done, you can be assured about high quality results. In this post, we take a brief look of the steps to take to bring out perfectly reconditioned cylinder heads.

In most cases, it happens inside the engine that valves contact with pistons with such a force that the heads of some valves get damaged minutely or severely. To make sure that they become just like what they were earlier, the following steps are taken.

• In the first step, all the components of the cylinder and removed and once done, the cleaning process is initiated.
• These heads and all its components are left in the alkaline based hot take for overnight and the temperature of this tank is maintained at somewhere around 80 degrees.
• The benefit is that all the bulk of the sludge and carbon deposits that had built up over the years get removed completely.

Amidst this, it is important to understand that the corrosion throughout the cylinder is a major cause behind the failure of cylinder head gaskets. Engineers say that this can be done easily with the help of quality coolant and by maintaining a good earth.

• In the next step, experts use a die grinder and with it, the component gets prepared for welding.
• This welding will repair the corroded area and also the damages that valve failure caused to the component.
• Once all the damages are welded, the next step involves machining and with its help, technicians can reconstruct all the water jackets.
• They then, re-shape the combustion chambers and bring them back to original factory specifications.
• In case, the broken valves have damaged some of the valve seats, experts will remove them to install completely new seats.

Other steps of the process of generating reconditioned cylinder heads are –

• The cylinder head is media blasted and pressure tested and is ready for machining.
• The gasket face is machined to within .0001″ to provide an exceptional mating surface for the head gasket to seal.
• It is finally washed and laid out ready for assembly.
• Once assembled and tested, reconditioned cylinder heads are now ready for delivery back to the customer.

Features To Look For In a Line Boring Machine

Line boring is a very convoluted thing and therefore, the staff takes no chance at all and simply relies upon the best machines. The best machines are determined on the basis of various factors and the most crucial of them all is the boring diameter.

According to the experts, a machine can be called an ideal, if it is capable of supporting boring diameters from 1.375 to 80 inches (35 to 2030 mm approx). Other factors that are determined at the time of selection of the machine are –

• The speed of the machine

• How precisely it is generating the results

Apart from these, some features are also looked for like specially designed mounting brackets, spherical bearings, self-centering set-up cones, and movable rotational drive and feed units. They are expected to be there in the machine, as they all simplify the set-up and allow the machine to work in conditions too tight for different machines used in this task. Moreover, the basic as well as highly advanced models should equally feature –

• Rugged Rotational Drive

• Axial Feed Systems

• Precision Bars

• Heavy Duty Bearings

• Electric, Pneumatic And Hydraulic Options

All of them should have the ability to work on the same mounting system with Auto Bore Welding Systems for single-setup machining and welding. Based on the features discussed above, we have got three different line boring machines that are unarguably the best. Let us know some more facts and figures about them.

BB3000 LINE BORING MACHINE

• Bar Diameters – 1.25 inches (31.8mm)

• Boring Diameters – 1.5-5 inches (38.1-127mm)

• Max. Stroke – 10 inches (254 mm)

• Torque at Bar – 40 ft-lb (54.2 N m)

• Power Options – Electric

BB4500 LINE BORING MACHINE

• Bar Diameters – 1.75 inches (44.5 mm), 1.25 inches (31.8 mm) optional

• Boring Diameters – 1.5 – 10 inches (38.1 – 254 mm)

• Max. Stroke – 24 inches (609.6 mm)

• Torque at Bar – 417 ft-lb (hydraulic) (565.4 N m)

• Power Options – Electric, Pneumatic, Hydraulic

BB5000 LINE BORING MACHINE

• Bar Diameters – 2.25 inches (57.2 mm), 1.25 inches (31.8 mm) optional

• Boring Diameters – 1.5 – 24 inches (38.1 – 609.6 mm)

• Max. Stroke – 36 inches (914.4 mm)

• Torque at Bar – 40 ft-lb (54.2 N m)

Uses and Benefits of Advanced Line Boring Machines

The task of line boring could not be possible without advanced machines designed to complete the task faster and with utmost precision. Their modus operandi allows them to cut the inside of any bore to enlarge its diameter to the preset size.

Another attribute is that they are developed to work in the shortest time possible and with utmost precision.

Some other features of a line boring machine used by the experts are discussed below.

• This machine is capable of creating the bore even the heavy-duty equipments such as cranes, end loaders, etc.
• It is very economical equipment used by the experts to meet the varying demands of their clients.
• This machine in its portable version is even more economical, flexible, powerful, and easy to use.
• The portable version is available in two forms, i.e. the pneumatic drive and hydraulic version.
• Apart from boring, it can be used for various other operations as well. For example –
• Measuring the bores using calibrated internal or external micrometers. Its size ranges from 50 mm to 2000 mm in diameter.
• For re-boring of holes on dozers, backhoes, and end loaders.
• In repair works to areas such as backhoe and track hoe buckets, articulating joints, wheel loader arm pin-holes and hinge points in tilt bed trailers, and steering axle sleeves in heavy duty fork trucks.
• One more attribute is that field machining repairs can be made on site and in-place.
• With modern-day machines, users would require a minimum amount of dismantling.
• Similarly, users would experience that unbolting leaks and down time are minimized, and productivity is increased with line boring machine.

The Benefits of Reconditioned Cylinder Heads

As soon as a vehicle starts causing troubles, the first thought to rush our minds is replacing it. However, experts say that this is not the only alternative and there are several better alternatives available that are economical as well. One such option is getting the engine’s cylinder head reconditioned as this has its own share of benefits.

• One of the top benefits is that it is a much affordable alternative as compared to buying a new vehicle all over again.
• Another very remarkable benefit is that with reconditioned cylinder heads, your vehicle’s engine would get a new leash of life and it would start behaving like absolutely new all over again.
• According to the experts, as you get reconditioned cylinder heads installed, you would experience that the life of the engine would double.
• This is certainly a better option even than buying a second-hand car. 

How is engine or cylinder head reconditioned?

In the process of getting reconditioned cylinder heads, the experts first open up the engine very carefully. The entire process basically involves –

• Opening every part of the engine
• Washing it
• Analyzing it carefully for defects like cracks, etc.
• Cranks are machined, polished or replaced as necessary
• Checking that engine block and cylinder head in order to ensure they have flat mating surfaces
• New bearing sets are  installed if required in both the connecting rods and main journals
• Pistons are fitted with new piston rings
• Cylinder heads are pressure tested to make sure they do not have any internal cracks
• New oil seals would be fitted to make the unit oil tight