Dealing with metal connectors that transmits motion needs vast knowledge and experience in the engineering department. Engineers term a piston rod as a long piece of material mostly metal that joins a pivotal wheel to a reciprocating crankshaft resulting motion. in the bid to reform it back, more information is necessary before embarking on resizing, straightening or spraying these metals. These bars form a crucial segment in machines.

If in good condition, they are essential in the optimum effect of any machine under the sun. No machine is able to perform any task without an engine. Therefore it is extremely important to check and refurbish if possible. The procedure is done to piston rods that may have been corroded to avoid major mechanical breakdown.

How to fix Connecting Rods

Before starting the repair process of these motion transmitters. Maximum hygiene has to be maintained to avoid further corrosion. In this case, the connecting rods have to be washed thoroughly to remove any debris that may be on the surface. They are further put under examination to find out if there are breaks, tares or even fragments that are affected by friction. Overheating can also contribute to the corrosion of the components. A keen eye and skills have to be implemented to avoid passing the assessment on the sections that need renovation. The most sensitive area to emphasize the rod effectiveness is the small-end bore. All this has to be done upon receipt and before any dismantling takes place.


Most bars fail because they are stressed by the reciprocating loads. While others are caused by improper tightening of bolts causing a disruption in the engine mechanism. Failure to lubricate the moving bit more frequently can also cause a disastrous effect on the engine. Typically, the big end connects to the crank pin via the crank throw. Then the smaller end of the shaft connects to the wrist pin. The bolts hold the rods in place mainly on the big end part. This portion undergoes a lot of pressurized friction and so it is important to grease the component at all times. A hole is drilled on the big end to facilitate oiling of the piston and piston rings. This is done if a malfunction occurs in the greasing procedure.


Once corrosion caused by friction is dealt with, the mating surfaces will be able to work smoothly. Henceforth, significantly reducing the risk of the machine parts to crack or break. If need be the big end is realigned to a designed diameter. Which will fit perfectly on the machine? Consequently, if short penning of the bore is required, it is done at this juncture.

The rod and the entire machine is then put into a test to make sure that all the parts are fitted properly and tight for that matter.

The assessment is done ensures that rods of identical weight are arranged accordingly. Thorough checking of invisible cracks is also completed to avoid the rod to fail if put under pressure- a process known as Magna fluxing. Once quality is achieved the rod is re-assembled with the help of new bolts, nuts and new bush on the small end. The final role is lubricating the moving parts to protect the new fragment from corroding early.