How to Pick the Best Harmonic Balancer Repair Sleeve
A harmonic balancer—also known as a vibration damper, torsional damper, crankshaft damper, or crank pulley damper—is a device connected to your engine's crankshaft for the sake of torsional vibration reduction. It also serves as a pulley for your drive belts. Meanwhile, the repair sleeve is something that's used to cover the location where the end seals are connected to the crank. The repair sleeve is there to protect the harmonic balancer and ensure that it keeps on dampening the torque that's imparted to the crankshaft every time the cylinders fire.
A Closer Look at the Harmonic Balancer Repair Sleeve
Vibrations occur whenever the crankshaft deflects under the torque from the firing cylinders of your car. In turn, at certain engine speeds, the cylinder torque becomes in sync with the crankshaft vibrations, creating resonance. This resonance causes stress beyond what your crankshaft can deal with, causing crankshaft failure. The harmonic balancer dampens vibrations to avoid resonance from happening. The sleeve goes over your crank that's either already compromised or is perfectly healthy but you want to maintain it healthy for the sake of preventive maintenance.
Applications and Specification Properties to Remember
Repair sleeves mainly protect the shafts and yokes as well as prevent cranks from suffering resonance due to cylinder torque resonating with crankshaft vibrations. When purchasing one, search for those with specs that include a surface that has been grinded to 0.25 - 0.50 micrometer Ra (10 - 20 Microinch Ra) finish without lead. It should also be available to the diameter your shaft is available in (for example, it could be 12.6-b203mm or 0.5 to 8 inches in diameter).
Indicators of a Superb Harmonic Balancer Repair Sleeve
If you want to give new life to your shafts and yokes, then the harmonic balancer sleeve technology is your best bet. When shopping for a good harmonic balancer, look for the sleeves that have ultra-low friction, wear-resistance, and superb hardness for trouble-free sleeve application. Avoid thin-wall flanged sleeves that are more trouble than their worth and go instead with a durable repair sleeve that operates with the least resistance possible.Just remember that it works best for crankshaft seal surfaces but does nothing for a knock at low speeds.
Benefits and Design Attributes to Look Out For
When buying a repair sleeve of the harmonic balancer variation, you should look for one with excellent abilities in heat reduction and failure mitigation. They're usually used to extend the life of your yokes and shafts, so pick a cost-effective, durable sleeve with hard-chrome coating to ensure a long operating lifespan from it. It should also have a stainless steel finish to give you a lower friction coefficient and a smoother surface to work with, helping reduce seal wear down and (again) heat at the same time.
The Dangers of Removing Your Harmonic Balancer
There's a myth circulating among performance enthusiasts and car modifiers alike that the harmonic balancer is a limiter or performance dampener that's so heavy it reduces engine performance, so removing it from your crank pulley can enhance the capabilities of your vehicle. You may also not need it due to large flywheels and set engine speeds. However, this is mostly false and you shouldn't take it off because the potential damage from the vibrations on your crank can totally destroy your car. Instead, ensure leak-free repair by putting on harmonic balancer sleeves on your shaft to minimize change in the original shaft diameter.