Kia Carens. Manual — part 21

gasket

Valve train noise

Worn valve guides

Repair

Low oil pressure

Refer to lubrication system

Improper valve clearance

Check HLA's

Broken valve spring

Replace

Sticking valves

Free valves

Camshaft worn or faulty

Replace

Insufficient power

Insufficient compression caused by :

1. Improper valve clearance
2. Leakage from valve seat
3. Seized valve stem
4. Weak or broken valve spring
5. Failed cylinder head gasket
6. Cracked or distorted cylinder

head

7. Sticking damaged or worn piston

ring

8. Cracked or worn piston

1. Check HLA's
2. Repair or replace
3. Replace
4. Replace
5. Replace
6. Repair or replace
7. Replace
8. Replace

Fuel system malfunction

Refer to fuel system

Slipping clutch

Refer to clutch

Dragging brakes

Refer to brake system

Wrong tire size

Refer to wheel and tires

Restricted exhaust system

Refer to exhaust system

Abnormal combustion

Improper valve clearance

Check HLA's

Sticking or burned valve

Replace

Weak or broken valve spring

Replace

Carbon accumulation combustion
chamber

Refer exhaust system

Engine knocks at idle when hot Loose or worn accessory drive

belt/tensioner

Check belts and tensioners
Replace if necessary

A/C compressor or generator bearing Replace

Improper oil viscosity

Install proper oil viscosity for
expected temperatures

Excessive piston pin clearance

Install new piston, pin and/or
connecting rod

Connecting rod clearance

Check and replace rods if necessary

Insufficient piston-to-bore clearance

Relace piston if necessary

Faulty timing belt tensioner or idler

Replace

Loose Crank-shaft pulley

Tighten or replace if necessary

Slight at idle, becomes louder
as engine speed is increased

Valve spring vlivking on valve cotter,
off square or broken

Repair or replace

Excessive stem to guide clearance

Repair

Excessive valve spring seat runout

Repair

Engine knocks when cold

Execcive piston to wall clearance

Replace pistons

Loose or broken damper pulley

Tighten or replace

Knock increases with torque

Excessive piston to bore clearance

Replace piston

Bent connecting rod

Replace

Engine has heavy knock when
hot and torque is applied

Broken damper pulley

Replace

Accessory belts too tight or damaged Adjust or replace belt

Belt tensioned damaged

Replace

Flywheel cracked or loose clutch
plate

Replace flywheel or clutch plate

Excessive main bearing clearance

Repair

Excessive rod bearing clearnace

Repair

Engine has light knock when
hot and under light load
conditions

Improper timing

Check timing

Piston pin connecting rod

Replace piston pin and/or rod

Poor quality fuel

Use recommended or higher grade
fuel

Exhaust leak at manifold

Tighten bolts and/or replace exhaust
manifold gasket of necessary

Engine knocks during initial
start up and lasts only a few
seconds

Improper oil viscosity

Install proper oil viscosity for
expected temperatures

Timing belt

Problem

Possible cause

Action

Tooth is broken or cracked

Camshaft jamming

Inspect camshaft by removing
cylinder head cover
Repair or replace if necessary

Back surface is cracked and/or
worn

Tensioner jamming

Inspect cooling system
Refer to engine cooling system

Engine overheating

Remove timing belt cover and
inspect
Replace if necessary

Interference with timing belt cover

Remove timing belt cover and
inspect

Side surface is worn and/or
frayed

Improper installation of timing belt

Remove timing belt and reinstall

Malfunction of timing belt guide plate

Remove timing belt and inspect
guide plate

Teeth are worn

Poor belt cover sealing

Remove timing belt cover and
inspect
Replace if necessary

Coolant leak at water pump

Inspect water pump
Replace if necessary

Camshaft malfunction

Inspect camshaft by removing the
cylinder head cover
Repair or replace if necessary

Excessive belt tension

Remove tensioner spring and inspect
Replace if necessary

Oil or coolant is on the belt

Poor oil sealing

Inspect front oil seals
Replace if necessary

Coolant leak at water pump

Inspect water pump
Replace if necessary

Poor belt cover sealing

Remove timing belt cover and
inspect
Replace if necessary

HLA (Hydraulic lash adjuster)

Problem

Possible cause

Action

1. Noise when engine is started
immeaiately after oil is changed
2. Noise when engine is starter after
setting apporx. one day

Oil leakage in
Oil passage

Run engine at 2,000~3,000rpm
If noise stops after 2 seconds- 10
minutes*, HLA is normal
If not, replace HLA
*Time required for engine oil to circulate
with in engine includes tolerance for
engine oil condition and ambient
temperature.

3. Noise when engine is started after
cranking for 3 seconds or more
4. Noise when engine is started after new
HLA installed.

Oil leakage in
HLA

5. Noise continues more than 10 minutes

Insufficient oil
pressure

Check oil pressure.
If lower than specification, check for cause.
Oil pressure : 313.9~490.5kPa
(3.2~5.0kg/cm², 45.5~71.1psi)-3,000rpm

Faulty HLA

Press down HLA by hand.
If it does not move, HLA is normal.
If it moves, replace HLA.
Measure valve clearance
If more than 0mm (0in), replace HLA

6 Noise during idle after high-speed
running

Incorrect oil amount

Check oil level.
Drain or add oil as necessary

Deteriorated Oil

Check oil quality
If deteriorated, replace with specified type
and amount oil

Cooling system

Problem

Possible Cause

Action

Overheating

Coolant level insuficient
Coolant leakge
Radiator fins clogged
Radiator cap malfunction
Fan motor malfunction
Thermostat malfunction
Water passage clogged
Water pump malfunction

Add
Repair
Clean
Replace
Replace
Replace
Clean
Repalce

Corrosion

Impurities in coolatn

Replace

Lubrication system

Problem

Possible cause

Action

Engine hard starting

Improper engine oil

Replace

Insufficient engine oil

Add oil

Excssive oil consumption

Internal wear : Worn rings worn valve
guides, worn valve seals or failed
cylinder head gasket

Replace

Oil leak

Repair

Oil pressure drop

Insufficient oil

Add oil

Oil leakage

Repair

Worn and/or damaged oil pump gear Replace

Worn plunger (inside oil pump) or
weak spring

Replace

Clogged oil strainer

Clean

Excessive main bearing or
connecting rod bearing clearance

Refer to Crankshaft insprction

Warning lamp illuminates while
illuminates while engine is
running

Oil pressure drop

As desribed above

Malfunction of oil pressure switch

Replace

Malfunction of electrical system

Replace or repair warning lamp
and/or related wire harness