Geely Emgrand X7. Manual part — 19

Vibration

Most of the high-speed vibrations are due to lack of wheel dynamic balance. If there still is
vibration after balancing the wheels, the reasons are:

–

Tire is output shaft

–

Rim is output shaft

–

Tire has hardness deviation

Measuring the amount of free jumping of tires and wheels can not determine all the reasons
leading to vibration. The above mentioned three reasons are known as the radial load. You must
use known good tires and wheels to replace the old ones and carry out the maintenance.

The low-speed vibration which occurred at the speed of 64 km/h is usually caused by free jumping.
The high-speed vibration occurring at the speed higher than 64 km/h is usually caused by
imbalances or jumping.

Correct uneven tires

There are usually two ways to correct the wheels with right balance but still with tire vibration.
One way is to use automatic machine tools. Install the tire onto a tire machine. Grind a small
amount of rubber off from the high point of the tire. This method is permanent. If following the
operation instructions, it will not affect the tire appearance and tire tread life. Correction using a
blade is not recommended, since this method will shorten the tire life and can not fundamentally
solve the issue.

Another method is to dismantle the tire and turn the tire 180 ° on the rim. Use this method only
after tire and wheel assembly has been confirmed as the cause of vibration. This is because this
method may result vibration with good tires, and can not solve the problem completely.

Abnormal sound

At high engine speed, inspect whether the insulation shield comes into contact with the
underbody.

–

Lifted vehicle and carried out visual inspection

–

Slightly bent insulation panels to create a gap between the panels and the underbody.

Squeak sound from the front of the vehicle in cold weather

Inspect the front stabilizer bar isolation sleeve.

–

Road test the vehicle when engine is cold and drive the vehicle through potholes to make the
front suspension reach the maximum travel limit.

–

Dismantle the front stabilizer bar isolation sleeve, wrap tapes around the bar and install the
front stabilizer bar isolation sleeve.

Abnormal sound from the rear of the vehicle when the vehicle is bumping

Inspect whether the spare tire is properly secured.

–

Opening the rear compartment and inspect the spare tire and the driver’s tools.

–

Fixed spare tire and attachment tools again.

–

Check if road test vehicle abnormal noise cleared

The rear window percussion sound when driving on rough roads

Inspect whether the rear door buckle is adjusted properly

–

Check this condition by road test vehicle

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–

Loosed latch nut and adjust latch

Door squish

Inspect whether the inner trim plate harness connector has the squish sound.

–

Tap the inner trim plate and carefully observe whether squish sound is heard.

–

Dismantle the inner trim plate and wrap foam pad to around the harness connector.

Door squeak

Inspect whether the door hinge is lack of lubrication.

– Operate the door back and forth and listen carefully to the door whether there is squeak

sound.

–

Use smear grease to lubricate the door hinge.

Manual transmission gearshift squeak (in the cold weather or when the engine is cold)

Inspect the Manual shifter assembly lower sheath of manual transmission

–

Switch between gears and verify the squeak.

–

Dismantle the floor console gearshift lever, lubricate it and install it.

1.10.1.2 Maintenance guidance

Wind/air noise

External wind noise

The wind noise leak repair is very similar to that of water leaking. Refer to 1.10.1.1 Diagnostic
Information and Procedures. The actual maintenance procedure depends on the type of seal
elements.

Vibration

Tire and wheel balancing (on-vehicle)

Carry out the balancing on the electronic wheel balancing machine. Dynamic balancing machine
is easy to use and can be used both for static balance and dynamic balance. Unlike the balancing
on vehicle, the off vehicle balancing can not correct the brake disc imbalance. However, the
accuracy of the off vehicle balancing can overcome this issue. Make a cone through the center
hole on the back, rather than through the wheel nut holes.

Tire and wheel balancing (off-vehicle)

On-vehicle tire and wheel balancing can correct the imbalance caused by disc brake vibration.

Warning!

Support the control arm at the normal position to avoid damage to drive axle. When the wheels
travel to the maximum low position, do not shift the gear lever.

1. Do not dismantle the balance weights during on vehicle tire and wheel balancing.

2. If the balance weight is more than 25g (1lb), divide it into two blocks and install one onto the

inner wheel rim and the other onto the outer wheel rim.

3.

Engine driven gear and gear assembly.

Tires and wheels directional installation

Tires and wheels are installed at the factory with the radial tires thicker parts (also known as the
high point) pointing to the minimum radius wheels (also known as low points).

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Red paint marks or labels are at high points along the outer of the tires when just delivery.

Valve core at the lower position of the wheel.

Before dismantling the tire, mark the position of the valve to make sure it can be installed back to
the original position. Before dismantling the tire, mark the position of the valve to make sure it
can be installed back to the original position.

Abnormal sound

Abnormal sound repair

Abnormal sound mainly comes from parts that should not have relative motion. To repair
abnormal sound, there are three ways:

–

Tighten the fasteners components, so that there is no relative motion.

–

Separate components, so that components do not contact.

–

Isolated parts, so that there is no abnormal noise when components moving.Even low friction
surfaces can be used to eliminate viscosity between the sliding components.

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1.11 Water Leakage

1.11.1 Description and operation

1.11.1.1 Diagnostic information and procedures

Water leakages diagnosis

Notes:

Identify all water leaking parts before repair. Random repair may only be a temporary solution and
could lead to more difficult repair in the future. Continue testing to identify all water leaking parts.

To repair water leakage , proper testing and diagnosis is needed. Adjust the position of the
incorrectly positioned components and use proper materials to carry out the repair.

Firstly, determine in what circumstances there is water leakage. For example: only when the
vehicle remains in the slope there is water leakage. Secondly, if the water leakage area has been
found, use water hose to locate exact position where water leakage . If water leakage is not
obvious, use a water leakages testing machine to identify specific positions. May be dismantle
partial interior tram plate or partial component to found water leakage position.

Water leakages test preparation

–

The vehicle is designed for running under normal conditions.

–

The sealing materials and components design has taken into account the natural environment
to achieve the seal strength. But these specification standard can not was took into account by
all person as condition

–

Water leakages test is related to the natural environment and can be used to determine the
vehicle driving performance under normal conditions.

–

The first step of the diagnosis process is to determine water leakage occurred under what
conditions. If you can determine the approximate water leakage area, you can use a water
hose to isolate the exact position. To repair water leakage , you may need to dismantle certain
components of the trim plates or components.

–

If the water leakage appears in the door, trunk door or window, it is not necessary that the
water leakage is created by sealing strip. Adjusting these parts might correct the water
leakage .

Testing with water supply hose

Notes:

Do not use

water supply hose

e with a nozzle.

1. Let an assistant inside the vehicle to confirm the exact position of water leakage .

2. Start testing from the bottom of the window or the windshield.

3. Move the hose slowly upward, until cover the entire roof.

Water supply hose test

Notes:

Ventilation hose test can only be used for completely cured the adhesive. Otherwise, the usage of
this method will damage the adhesive layer, leaving increased water leakage spots.

1. Pour liquid cleaning agent into a spray bottle according to a certain percentage, then spray it

to window edge. Spray from the bottom, gradually upward and through the entire roof.

Notes:

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