SORENTO(BL) > 2004 > G 3.5 DOHC > Engine Mechanical System DISASSEMBLY 1. Remove the engine cover. 2. Disconnect the battery negative terminal. 3. Disconnect the radiator lower hose. 4. Disconnect the radiator upper hose. 5. Remove the radiator assembly. 6. Using a [16 mm], rotate the tensioner arm clockwise (about 14 )and remove the belt from the pulley. 7. Remove the alternator and alternator bracket. 8. Remove the power steering pump pulley, idler pulley, tensioner pulley and crankshaft pulley. 9. Remove the upper and lower timing belt covers. 10. Remove the auto tensioner. Rotate the crankshaft clockwise and align the timing mark to set the No.1 cylinder's piston to TDC (compression stroke). At this time, the timing marks of the camshaft sprocket and cylinder head cover should coincide with each other. https://www.kiatechinfo.com/viewer/print_pop.aspx?pos=9$3_3_2_1_2&vehicletype=passenger&mfrcode=km&area=kma&langcode=eng&modelid=bl13&modeldesc=sorento(bl)&modelyr=2004&mmctype=en 1/7
11. Unbolt the tensioner to remove the timing belt. If you plan to use the timing belt again, mark the rotation direction on the belt so you reinstall it correctly. 12. Remove the crankshaft sprocket. INSPECTION 1. 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. (3) Side of belt is badly worn. A belt in good condition should have clear-cut sides as if it were cut with a sharp knife. https://www.kiatechinfo.com/viewer/print_pop.aspx?pos=9$3_3_2_1_2&vehicletype=passenger&mfrcode=km&area=kma&langcode=eng&modelid=bl13&modeldesc=sorento(bl)&modelyr=2004&mmctype=en 2/7
(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 2. If backlash or an irregular noise is observed when rotating the pulley, replace the timing belt tensioner and idler pulley. INSTALLATION https://www.kiatechinfo.com/viewer/print_pop.aspx?pos=9$3_3_2_1_2&vehicletype=passenger&mfrcode=km&area=kma&langcode=eng&modelid=bl13&modeldesc=sorento(bl)&modelyr=2004&mmctype=en 3/7
The method of installing timing belt and auto tensioner. 1. Install idler pulley to engine support lower bracket. 2. Install tensioner arm, shaft and plane washer to cylinder block. Tightening torque : 34.3-53.9 Nm (3.5-5.5 kg.m, 25.3-39.8 lb.ft) 3. Install crankshaft sprocket and align the timing mark. Be careful not to bend crankshaft sensing blade. https://www.kiatechinfo.com/viewer/print_pop.aspx?pos=9$3_3_2_1_2&vehicletype=passenger&mfrcode=km&area=kma&langcode=eng&modelid=bl13&modeldesc=sorento(bl)&modelyr=2004&mmctype=en 4/7
4. Install camshaft sprocket and adjust initial installation state as illustration. 5. Install auto tensioner to oil pump case. At this time auto tensioner's set pin should be assembled completely. 6. Align the timing marks of each sprocket and install the timing belt in this order. Crankshaft sprocket Idler pulley Exhaust camshaft sprocket (LH) Intake camshaft sprocket (LH) Water pump pulley Intake camshaft sprocket (RH) Exhauft camshaft sprocket (RH) Tensioner pulley https://www.kiatechinfo.com/viewer/print_pop.aspx?pos=9$3_3_2_1_2&vehicletype=passenger&mfrcode=km&area=kma&langcode=eng&modelid=bl13&modeldesc=sorento(bl)&modelyr=2004&mmctype=en 5/7
In this step, No. 1 is in TDC (Compression stroke) Do not insert fingers. 7. After installating the timing belt, reconfirm the timing mark. 8. Rotate the crankshaft 1/4 rotation connterclockwise and then rotate the crankshaft clockwise with align the timing mark. 9. Loosen the center bolt of tensioner pulley. Apply tension for timing belt by rotating the tensioner pulley with SST(09244-28100) and torque wrench. Tension torque : 0.5 kg m 10. Tighten the center bolt of tensioner pulley. Tightening torque : 4.3 ~ 5.5 kg m 11. Pull out the auto tensioner set pin after adjusting timing belt tension. (Refer to "How to adjust timing belt tension") 12. Install the other parts reverse order of removal. How to adjust timing belt tension 1. Tension setting (While auto tensioner is not operating : And fixing pin being kept installed.). (1) After rotating crankshaft 1/4 revolution reversely, rotate it clockwise to position No. 1 cylinder at TDC. Then, loosen the center bolt and give the belt 50kg-cm of tension with tensioner pulley socket (Two pins are attached) and torque wrench. While maintaining this state, tighten the center bolt to the standard torque. Center bolt standard torque : 43-55 N ㆍ m (430-550kg ㆍ cm, 31.72-40.57 lb ㆍ ft) (2) Pull out the auto tensioner fixing pin. 2. How to check tension (While auto tensioner is operating : and fixing pin being uninstalled.) (1) https://www.kiatechinfo.com/viewer/print_pop.aspx?pos=9$3_3_2_1_2&vehicletype=passenger&mfrcode=km&area=kma&langcode=eng&modelid=bl13&modeldesc=sorento(bl)&modelyr=2004&mmctype=en 6/7
After rotating crankshaft 2 revolutions clockwise to position No. 1 cylinder at TDC, wait for about 5minutes, and measure the amount of protruding of the auto tensioner rod. This is "leak down" time for the auto tensioner rod to protrude 1mm when tension caused by rotation of the crankshaft has changed. (2) Check if the amount of rod protruding is in the range of 3.8~4.5mm (0.15~0.18in.). 3. Recheck if each sprocket is within the specified range. If it is not within the specified range, repeat from procedure 6 as service procedure of timing belt and auto tensioner installation method. https://www.kiatechinfo.com/viewer/print_pop.aspx?pos=9$3_3_2_1_2&vehicletype=passenger&mfrcode=km&area=kma&langcode=eng&modelid=bl13&modeldesc=sorento(bl)&modelyr=2004&mmctype=en 7/7