2007 KIA CARNIVAL overheating

If the margin thickness is less than the specification, replace the valve.
Specification
Intake : 1.0mm(0.0394in.)
Exhaust : 1.3mm(0.0512.)
(4)Check the valve length.
Length
Intake : 110.1mm(4.3346in)
Exhaust : 111.1mm(4.3740in)
(5) Check the surface of the valve stem tip for wear.
If the valve stem tip is worn, replace the valve.
3. Inspect valve seats
(1) Check the valve seat for evidence of overheating or improper contact with the valve face.
If the valve seat is worn, replace cylinder head.
(2) Before reconditioning the seat, check the valve guide for wear. If the valve guide is worn, replace the valve
guide first.
(3) Recondition the valve seat with a valve seat grinder or cutter. The valve seat contact width should be within
specifications and centered on the valve face.
4. Inspect valve springs.
(1) Using a steel square, measure the out - of- square of the valve spring.
(2) Using vernier calipers, measure the free length of the valve spring.
Valve spring
[Standard]
Free height : 46.8mm (1.8425in.)
Out- of- square : 1.5° or less

2007 > 2.7L V6 GASOLINE >
SERVICE ADJUSTMENT PROCEDURE
Automatic transaxle fluid
INSPECTION 1. Drive the vehicle until the fluid reaches normal operating temperature [70~80°C].
2. Place the vehicle on a level surface.
3. Move the selector lever through all gear positions. This will fill the torque converter and the hudraulic system with
fluid and move the selector lever to the "N" (Neutral) or "P"(Park) position.
4. Before removing the oil level gauge, wipe all contaminants from around the oil level gauge. Then take out the oil
level gauge and check the condition of the fluid.
If the fluid smells as if it is burning, it means that the fluid has been contaminated by fine particles from the
bushes and friction materials, a transaxle overhaul may be necessary.
5. Check that the fluid level is at the HOT mark on the oil level gauge. If the fluid level is low, add automatic transaxle
fluid until the level reaches the "HOT" mark.
Auto transaxle fluid:
DIAMOND ATF SP - III, SK ATF SP - III
Quantity : 8.5ℓ (9.0 US qt, 7.5 lmp.qt)
Low fluid level can cause a variety of a abnormal conditions because it allows the pump to take in air along
with fluid. Air trapped in the hydraulic system forms bubbles, which are compressable. Therefore, pressures
will be erratic, causing delayed shifting ,slipping clutches and brakes, etc. Improper filling can also raise fluid
level too high. When the transaxle has too much fluid, gears churn up foam and acuise the same conditions
which occur with low fluid level, resulting in accelerated deterioration of automatic transaxle fluid. In either
case, air bubbles can cause overheating, and fluid oxidation, which can interfere with normal valve, clutch, and
brake operation. Foaming can also result in fluid escaping from the transaxle vent where it may be mistaken
for a leak.
6. Insert the oil level gauge(A) securely.
When new, automatic transmission fluid should be red. The red dye is added so the assembly plant can
identify it as transmission fluid and distinguish it from engine oil or antifreeze. The red dye, which is not an
indicator of fluid quality, is not permanent. As the vehicle is driven the transmission fluid will begin to look
darker. The color may eventually appear light brown.

2007 > 2.7L V6 GASOLINE >
TROUBLESHOOTING
Symptom Possible cause Remedy
Vehicle pulls to one side Scoring of driveshaft ball joint
Wear, rattle or scoring of wheel bearing
Defective front suspension and steering Replace
Replace
Adjust or replace
Vibration Wear, damage or bending of driveshaft
Driveshaft rattle and worn hub splines
Wear, rattle or scratching of wheel bearing Replace
Replace
Replace
Shimmy Improper wheel balance
Bent wheel
Defective front suspension and steering Adjust or replace
Replace
Adjust or replace
Excessive noise Wear, damage or bending of driveshaft
Driveshaft rattle and worn hub splines
Driveshaft rattle and worn side gear splines
Wear, rattle or galling of wheel bearing
Loose hub nut
Defective front suspension and steering Replace
Replace
Replace
Replace
Adjust or replace
Adjust or replace
Bent cage Cage damaged by improper handling or tool usage Replace bearing
Galling Metal smears on roller end due to overheating,
incorrect lubricant or overloading Replace bearing
Check seals, check for
proper lubrication
Cracked inner race Race cracked due to improper fit, cocking or poor bearing
seats Replace bearing
Etching Bearing surfaces appear gray or grayish black
in color accompanied by material etched
away usually at roller spacing Replace bearing
Check seals, check for
proper lubrication
Brinelling Surface indentations on race surface caused by rollers
being under impact loading or vibration while the bearing
is not rotating Replace bearing
Heat discoloration Heat discoloration is dark blue resulting
from overload or no lubricant (Yellow or brown color is
normal) Replace bearing
Check seals and other parts
Fatigue spalling Flaking of surface metal resulting from fatigue Replace bearing
Clean all related parts

3.The two coolant temperature sensors are installed to the heater inner. The sensor valves determine heater
operation.
4. One of the temperature sensors functions to prevent the heater from overheating.
If the sensor temperature valve exceeds 125°C, the fuel will be cut and the heater will be deactivated by the
determination of the overheating of the heater.
The other temperature sensor determines the operation mode of the fuel fired heater.The temperature of this
sensor enables to activate the heater at full load(5kw) or half load(2.5kw).
• The coolant temperature shown on the above Figure is the value of the inner sensor and the actual coolant
temperature is higher about 5°C ~7°C than the above value.
OPERATION
Switch on/ Operation start
The fuel fired heater is operated when the coolant temperature is below 68°C and the ambient temperature is below
2°C after starting the engine.
At this time, the glow plug and combustion air fan are operated first and after 30 seconds, the dosing pump is
operated with stopping the combustion fan for 3 seconds.
After that, the operation of the fan increases continuously until it approaches to full load within 56 seconds. If fuel
supply reaches to full load the glow plug does not operate and the operation of the fan reaches to full load.
After that the glow plug monitors ignition condition as a flame sensor for 45 seconds.
The above operation procedure is done automatically and in case the ignition fails, the above operation will be done
again automatically.
If the condition of ignition failure sustains continuously, fuel supply and fan operation will be stopped and error codes
will be stored to find cause of failure.
Generally, the cause of ignition failure during combustion is caused by the automatic re- operation of the above
procedure.
Operation for heating
The fuel fired heater operates at full load when the coolant temperature is below 68°C and the ambient temperature is
below 2°C after starting the engine.
It operates at half load when the coolant temperature is 74°C and it operates at idle mode when the coolant
temperature is 78°C.
The fuel fired heater during the transformation process does a cleaning function from the half mode to the idle mode.
At idle mode, all components do not work.
The fuel fired heater operating at idle mode turns into the half load when the coolant temperature is 74°C. At this time,
if the coolant temperature drops again below 68°C, the heater operates with full load and turns into the idle mode if
the temperature is 78°C.
This serial operating process is performed automatically.
Key switch off / Operation stop
The fuel fired heater ECU stops the operation of the fuel pump and cuts fuel supply when shutting off the engine
during the heater operation.
The heater conducts cleaning operation at this time.
This is a process of burning the fuel completely supplied in the heater inner.
In this process, the glow plug and combustion air fan are operated.

Brake disc run out
Limit : 0.03 mm (0.0012 in.) or less (new one)
2. If the run out of the brake disc exceeds the limit specification, replace the disc, and then measure the run out
again.
3. If the run out does not exceed the limit specification, install the brake disc after turning it 180° and then check the
run out of the brake disc again.
4. If the run out cannot be corrected by changing the position of the brake disc, replace the brake disc.
Seizing of Front brake disc
1.Remove the brake disc from hub using an M8 screw(A) if the brake disc has been seized with the hub due to
corrosion or overheating.
Be careful not to use a hammer. The disc can be damaged if you remove the disc from the hub by
hammering.

3.If the run out does not exceed the limit specification, install the brake disc after turning it 180° and then check the
run out of the brake disc again.
4. If the run out cannot be corrected by changing the position of the brake disc, replace the brake disc.
Seizing of Rear brake disc
1.Remove the brake disc from hub using an M8 screw (A) if the brake disc has been seized with the hub due to
corrosion or overheating.
Be careful not to use a hammer. The disc can be damaged if you remove the disc from the hub by
hammering.