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9/26/2019 SHOP G 1.6 DOHC Engine Mechanical System Timing System Timing Belt Repair procedures 2009 Hyundai Accent (MC) Mot

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Removal

Engine removal is not required for this procedure. 1. Remove the engine cover.

2. Remove the RH front wheel.

3. Remove the 2 bolts(B) and RH side cover(A).

4. Temporarily loosen the water pump pulley bolts.

5. Remove the alternator drive belt(A). (Refer to Alternator in EE Group).

6. Remove the air conditioner compressor drive belt(B). (Refer to Air conditioner compressor in HA Group). 7. Remove the power steering pump drive belt(C).

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8. Remove the 4 bolts and water pump pulley.

9. Remove the 4 bolts(B) and timing belt upper cover(A).

10. Turn the crankshaft pulley, and align its groove with timing mark "T" of the timing belt cover. Check that the timing mark of camshaft sprocket is aligned with the timing mark of cylinder head cover. (No.1 cylinder compression TDC position)

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12. Remove the crankshaft flange(A).

13. Remove the 4 bolts(B) and timing belt lower cover(A).

14. Remove the timing belt tensioner(A) and timing belt.

NOTICE

If the timing belt reused, make an arrow indicating the turning direction to make sure that the belt is reinstalled in the same direction as before.

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15. Remove the bolt(B) and timing belt idler(A).

16. Remove the crankshaft sprocket(A).

17. Remove the cylinder head cover.

(1) Remove the wire harness bracket(A).

(2) Remove the ignition coil.

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(4) Remove the engine cover bracket(A).

(5) Loosen the cylinder head cover bolts(B) and then remove the cover(A) and gasket.

18. Remove the camshaft sprocket.

(1) Hold the portion(A) of the camshaft with a hexagonal wrench, and remove the bolt(C) with a wrench(B) and remove the camshaft sprocket.

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CAUTION

Be careful not to damage the cylinder head and valve lifter with the wrench.

Inspection

Timing Belt

1. Check the belt for oil or dust deposits. Replace, if necessary.

Small deposits should be wiped away with a dry cloth or paper. Do not clean with solvent.

2. When the engine is overhauled or belt tension adjusted, check the belt carefully. If any of the following flaws are evident, replace the belt.

NOTICE

• Do not bend, twist or turn the timing belt inside out.

• Do not allow timing belt to come into contact with oil, water and steam.

3. Inspect the belt closely. If the following problems are evident, replace the belt with a new one. (1) Hardened back surface of rubber.

Back surface is glossn, non-elastic and so hard that when the nail of your finger is pressed into it, no mark is produced.

(2) Cracked back surface of rubber.

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NOTICE

A belt in good condition should have clear-cut sides as if it were cut with a sharp knife.

(4) Teeth are badly worn out.

Initial stage : Canvas on load side of the tooth flank worn (fluffy canvas fibers, rubber gone, color changed to white, and unclear canvas texture)

Last stage : Canvas on the load side of the tooth flank worn down and rubber exposed (tooth width reduced). (5) Missing tooth.

Sprockets, Tensioner, Idler

1. Check the camshaft sprocket, crankshaft sprocket, tensioner pulley and idler pulley for abnormal wear, cracks, or damage. Replace as necessary.

2. Inspect the tensioner pulley and the idler pulley for easy and smooth rotation and check for play or noise. Replace as necessary.

3. Replace the pulley if there is a grease leak from its bearing.

Installation

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(1) Temporarily install the camshaft sprocket bolt(C).

(2) Hold the portion(A) of the camshaft with a hexagonal wrench, and tighten the bolt(C) with a wrench(B) . Tightening torque :

78.5 ~ 98.1N.m (8.0 ~ 10.0kgf.m, 57.9 ~ 72.3lb-ft)

2. Install the cylinder head cover.

(1) Install the cylinder head cover(A) and bolts(B). Tightening torque :

7.8 ~ 9.8N.m (0.8 ~ 1.0kgf.m, 5.8 ~ 7.2lb-ft)

NOTICE

Tighten the cylinder head cover bolts as following method.

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(3) Install the PCV(Positive Crankcase Ventilation) hose(A) and breather hose(B) to the cylinder head cover.

(4) Install the ignition coil.

3. Install the crankshaft sprocket(A).

4. Align the timing marks of the camshaft sprocket(A) and crankshaft sprocket(B) with the No.1 piston placed at top dead center and its compression stroke.

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5. Install the idler pulley(A) and tighten the bolt(B) to the specified torque. Tightening torque :

42.2 ~ 53.9N.m (4.3 ~ 5.5kgf.m, 31.1 ~ 39.8lb-ft)

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7. Install the belt so as not give slack at each center of shaft. Use the following order when installing timing belt. Crankshaft sprocket(A) →idler pulley(B) →camshaft sprocket(C) →timing belt tensioner(D).

8. Adjust the timing belt tension.

(1) Loosen the tensioner pulley mounting bolt and apply tension to the timing belt.

(2) After checking the alignment between each sprocket and each timing belt tooth, tighten the mounting bolt (A) and (B) one by one.

Tightening torque :

19.6 ~ 26.5N.m (2.0 ~ 2.7kgf.m, 14.5 ~ 19.5lb-ft)

(3) Then recheck the belt tension.

Verify that when the tensioner and the tension side of the timing belt are pushed in horizontally with a moderate force [approx. 49N (11lb)], the timing belt cog end is aprox. 1/2 of the tensioner mounting bolt head radius (across flats) away from the bolt head center.

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(4) Timing belt tension measuring procedure [Using a mechanical tension gauge (BT-33-73F, BTG-2 type)] Rotate crankshaft in clockwise direction to set 1st piston on top dead center (TDC) and rotate crankshaft in

counterclockwise to 90° then measure the belt tension in the middle of tension side span (in both arrow direction of above illustration ) by free vibration method.

CAUTION

When rotating the crankshaft counter-clockwise, be sure to rotate the crankshaft at a time. a. Input the belt specifications into the tension meter.

Location of measurement Input data

M (Mass, g/m.mm) W (Width, mm) S (Span, mm)

T1 Camshaft sprocket to crankshaft

sprocket 4.5 22 250

T2 Camshaft sprocket to tensioner 4.5 22 231

b. Locate the micro phone close to the center of belt span (T1, T2) and bounce the belt by finger 2~3 times. Read a value on the display.

c. Measure both T1 and T2 at the A and B points respectively and then calculatethe average

Average Belt Tension (T)

Without CVVT(1.4L/1.6L): 20±3.5 kgf With CVVT(1.6L): 18±3.5 kgf

9. Turn the crankshaft two turns in the operating direction (clockwise) and realign crankshaft sprocket and camshaft sprocket timing mark.

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Tightening torque :

7.8 ~ 9.8N.m (0.8 ~ 1.0kgf.m, 5.8 ~ 7.2lb-ft)

11. Install the flange and crankshaft pulley(A), and then tighten crankshaft pulley bolt. Make sure that crankshaft sprocket pin fits the small hole in the pulley.

Tightening torque :

137.3 ~ 147.1N.m (14.0 ~ 15.0kgf.m, 101.3 ~ 108.5lb-ft)

12. Install the timing belt upper cover(A) with 4 bolts(B). Tightening torque :

7.8 ~ 9.8N.m (0.8 ~ 1.0kgf.m, 5.8 ~ 7.2lb-ft)

13. Install the water pump pulley and 4 bolts.

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15. Install the air conditioner compressor drive belt(B). (Refer to Air conditioner compressor in HA Group).

16. Install the alternator drive belt(A). (Refer to Alternator in EE Group). 17. Install the RH side cover(A) with 2 bolts(B).

18. Install the RH front wheel. Tightening torque :

88.3 ~ 98.1N.m (9.0 ~ 10.0kgf.m, 65.1 ~ 72.3lb-ft)

19. Install the engine cover with bolts. Tightening torque :

References

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