Elantra L4-1595cc 1.6L DOHC (1993)
^
If the runouts are not ok - Go to step (8).
(8)
Measure axle shaft and hub flange lateral runout
^
If runouts of either parts are not within specification, replace parts as necessary and then Go to step (9).
(9)
Off-car dynamic balance:
^
Balance wheel/tire assembly on a two-plane off-car balancer (static one-plane off-car balancer is not recommended). For proper balancing
of wheel/tire assembly, follow the equipment manufacturer's instructions.
^
If vibration condition is not corrected - Go to step (10).
(10) On-Car Finish Balance:
^
Follow procedure II for properly balancing the tire/wheel assembly on the vehicle. ^If the vibration complaint is not resolved - Go to step
(11).
(11) Engine/Driveline Imbalance:
If all of the above steps are followed correctly, and the problem still persists, it is very likely that the vibration is related to engine/driveline
imbalance. Check the engine/transaxle mounts, fan blades, engine accessory bolts, and brackets, and air conditioning compressor operation.
I. Road Test Procedure
The initial road test is the most important step in the diagnosis and subsequent correction of vehicle vibration. Select a road test area with as smooth a
road surface as available and where a speed of 55 mph or greater is possible. Check and adjust all four tires for proper air pressure as recommended in
the owner's manual. Inspect tires for misalignment, cupping, or scalping conditions. Road test the vehicle with the customer, if possible, to determine the
exact vibration complaint, recording the speed at which the condition occurs.
A neutral coast test is a good method to determine if the engine/accessories, driveline, or wheel/tires are causing the vibration problem. To do this,
accelerate to 55-65 mph and place transmission selector in "neutral," allowing engine to return to idle speed. If the problem exists in this condition, the
investigation can be confined to driveline and tire/wheel assemblies. If the problem does not exist during "neutral" coast, the investigation can be
confined to engine/accessories.
Another good test is to carefully overinflate all four tires to approximately 10 psi above the maximum stated on the tire sidewall. Then, repeat the road
test over the same road and at the same speeds. If the disturbance is eliminated or changed noticeably, deflate one front tire to normal operating pressure
and repeat the test. If the problem does not return, continue adjusting tire pressure and road testing, one tire at a time, until the original problem returns.
The last wheel/tire adjusted to normal operating pressure will usually be the one requiring service.
Remember, vibrations that occur at less than 40 mph are usually related to runout, while those that occur above 40 mph may be caused by either runout
or imbalance.
II. On-Car Finish Balance
On-car balancing is recommended only when off-car dynamic balancing and tire-wheel matching does not reduce vehicle vibration to an acceptable
level.
Off-car dynamic balancing solves the vast majority of vibration problems; it balances tire and wheel assemblies statically and dynamically.
On-car balancing is recommended when other rotating vehicle parts are out of balance, such as brake rotors/drums, wheel covers, etc. On-car balancing
normally corrects only static imbalances. Therefore, DO NOT REMOVE THE OFF-CAR BALANCE WEIGHTS. If removed before performing the
on-car static balance, the lateral balance correction will be lost. In addition, always put half the on-car balance correction weights on each flange. It may
be helpful to the customer if the on-car balance correction weights are marked with a paint stick; then, when the customer rotates that tire to another
position on the vehicle, only the marked weights can be removed.
Hyundai recommends using Hofmann ELECTRONIC INFRARED MODEL TYPE IPK-2 finish balancer or equivalent. To properly balance the
tire/wheel assembly on-car, one must follow the wheel balancer manufacturer's procedure. The following precautionary measures are necessary when
spinning the DRIVE wheels by use of the vehicle engine.
1.
Support both drive wheels on the pick-up supports supplied by the wheel balance manufacturer. Ensure that vibration from spin-up will not
dislodge the vehicle.
2.
Never spin-up the front wheels while they are in a hanging position as damage may occur to the front wheel drive mechanism.
3.
Be sure that areas in front of and behind the tire/wheel assembly position are kept clear during spin-up.
4.
Have another person start the engine and shift to automatic or manual high gear position.
