Fixing a Harmonic Balancer with a Repair Sleeve
Most often than not, a knocking sound and a squeaking noise coming from the engine is commonly associated with a problem with the belt. However, it can also be the result of the outer ring separating. If left unrepaired, the broken outer ring may damage the radiator, water pump, and other things around it. Since the balancer is broken, it can no longer protect the crankshaft, which can eventually lead to the destruction of an engine. If that happens, the engine needs to be removed from the car for disassembly, which will cost a lot. Below are steps to fix your car's broken harmonic balancer and prevent expensive cost repairs with a repair sleeve.
Difficulty level: Easy
Things you'll need:
- Repair Sleeve (also known as Speedi-sleeve)
- Wooden block
- Steel wool
- Pan to boil water
- Set of tongs
Quick Note: These steps are to be taken once you have already removed the harmonic balancer from the car. In addition, before buying a harmonic repair sleeve, measure the diameter of the unworn part of the shaft where the sleeve will be placed. To have a more accurate measurement, measure in three points and average the results. This is to make sure that the shaft is still within the recommended dimensions, and you need not use an adhesive to hold the sleeve and prevent it from sliding out.
Step 1: Once you have finished determining that the shaft of the harmonic balancer is within specification, use the steel wool and rub the end of the harmonic balancer. Remove any sediments stuck on the balancer until it is smooth and clean.
Step 2: Once clean, place the harmonic balancer in the freezer for a couple of hours. This allows the metal to shrink as much as possible and makes fitting the repair sleeve easier.
Step 3: Before pulling the harmonic balancer out of the freezer, dip the repair sleeve in boiling water and leave it for a couple of minutes. This step is to let the repair sleeve expand as much as possible.
Step 4: After heating the sleeve, remove the cold harmonic balancer from the freezer. Using a pair of tongs, pick the hot repair sleeve and put it on the shaft of the harmonic balancer.
Step 5: In order for the sleeve to hit the bottom of the shaft, put a block of wood on the repair sleeve opposite to the side where the shaft and the sleeve meet. Hammer the block of wood down until it makes contact with the harmonic balancer. If the repair sleeve fails to touch the bottom of the shaft after pounding it down with the block of wood, look for a pipe with the same diameter as that of the repair sleeve and use that to push the repair sleeve further down the shaft.
Step 6: After installing the harmonic balancer repair sleeve, check the repaired component for any rough edges left. If there are any, smoothen them down since any burrs may damage the seal.
Step 7: Cover the sleeve with the system's lubricant before installing the harmonic balancer's seal back.