Timing Belt Replacement Recommendations

Index by Manufacturer

A1

Acura................................................................................ 1Alfa Romeo ...................................................................... 1American Motors.............................................................. 1Asuna ............................................................................... 1Audi .................................................................................. 1-3BMW ................................................................................ 3Buick ................................................................................ 3Cadillac ............................................................................ 3Chevrolet.......................................................................... 3-4Chevrolet/G.M.C. ............................................................. 4Chrysler............................................................................ 4-5Daewoo............................................................................ 5Daihatsu........................................................................... 5Datsun (see Nissan) ........................................................ 18Dodge............................................................................... 5-7Eagle ................................................................................ 7-8Fiat ................................................................................... 8Ford.................................................................................. 8-9G.M.C. (see Chevrolet/G.M.C). ....................................... 4GEO ................................................................................. 9Honda............................................................................... 9-10Hyundai ............................................................................ 10-11Infinity............................................................................... 11Isuzu................................................................................. 11-12Jeep ................................................................................. 12

Kia .................................................................................... 12Lancia............................................................................... 12Land Rover ...................................................................... 12Lexus................................................................................ 12-13Mazda .............................................................................. 13-14Mercury ............................................................................ 14Merkur .............................................................................. 14Mitsubishi ......................................................................... 15-18Nissan .............................................................................. 18Oldsmobile ....................................................................... 18Optima.............................................................................. 18Peugeot............................................................................ 18Plymouth .......................................................................... 19-20Pontiac ............................................................................. 20Porsche............................................................................ 20Renault............................................................................. 20Saab................................................................................. 20Saturn............................................................................... 20Sterling ............................................................................. 21Subaru.............................................................................. 21Suzuki .............................................................................. 21Toyota .............................................................................. 21-23Volkswagen...................................................................... 23-24Volvo ................................................................................ 24-26

Manufacturer Page Manufacturer Page

TB No. Teeth Width mm/" Length mm/" Profile TB No. Teeth Width mm/" Length mm/" Profile TB No. Teeth Width mm/" Length mm/" Profile

TB 013 122 19mm 1162.0mm TB 042 148 19mm 1409.7mm TB 086 69 19mm 657.2mm 3/4" 45 3/4" 3/4" 55 1/2" 3/4" 25 7/8"

TB 014 129 22.3mm 1228.7mm TB 043 135 25.4mm 1285.9mm TB 087 139 25.4mm 1324mm 7/8" 48 3/8" 1" 50 5/8" 1" 52 1/8"

TB 015 129 19mm 1228.7mm TB 045 111 25.4mm 1057.3mm TB 088 109 19mm 1038.2mm3/4" 48 3/8" 1" 41 5/8" 3/4" 40 7/8"

TB 016 96 19mm 1219.2mm TB 048 180 25.4mm 1714.5mm TB 089 122 19mm 1162mm

3/4" 48" 1" 67 1/2" 3/4" 45 3/4"

TB 017 121 18mm 1152.5 mm TB 061 100 19mm 954.5mm TB 090 55 12.7mm 523.9mm 5/7" 45 3/8" 3/4" 37 37/64" 1/2" 20 5/8"

TB 018 116 19mm 1104.9mm TB 062 55 12.7mm 523.9mm TB 091 163 25.4mm 1552.6mm 3/4" 43 1/2" 1/2" 20 3/4" 1" 61 1/8"

TB 019 144 19mm 1371.6mm TB 063 92 19mm 876.3mm TB 092 83 19mm 790.6mm3/4" 54" 3/4" 34 1/2" 3/4" 31 1/8"

TB 020 146 19mm 1390.6 mm TB 064 120 19mm 1143mm TB 093 120 19mm 1143mm

3/4" 54 3/4" 3/4" 44 7/8" 3/4" 45"

TB 021 98 17mm 933.4mm TB 065 113 19mm 1076.3mm TB 094 108 24mm 1028.7mm2/3" 36 3/4" 3/4" 42 3/8" 15/16" 40 1/2"

TB 022 91 19mm 866.8mm TB 067 97 25.4mm 923.9mm TB 095 89 19mm 847.7mm

3/4" 34 1/8" 1" 36 3/8" 3/4" 33 3/8"

TB 023 103 19mm 981.1mm TB 068 148 19mm 1409.7mm TB 096 117 25.4mm 1114.4mm

3/4" 38 5/8" 3/4" 55 1/2" 1" 43 7/8"

TB 024 180 25.4mm 1714.5mm TB 069 118 19mm 1123.9mm TB 097 76 19mm 723.9mm

1" 67 1/2" 3/4" 44 1/4" 3/4" 28 1/2"


3/4" 34 7/8" 3/4" 33" 1" 66 3/8"

TB 026 105 19mm 1000.1mm TB 071 124 24.7mm 1181.1mm TB 099 101 24mm 962mm3/4" 39 3/8" 35/36" 46 1/2" 15/16" 37 7/8"

TB 027 80 19mm 762mm TB 072 80 15.9mm 762mm TB 100 95 19mm 904.9mm3/4" 30" 5/8" 30" 3/4" 35 5/8"

TB 028 84 19mm 800.1mm TB 073 92 19mm 876.3mm TB 101 169 25.4mm 1352mm3/4" 31 1/2" 3/4" 34 1/2" 1" 53 1/4"

TB 029 133 25.4mm 1266.8mm TB 074 142 25.4mm 1352.5mm TB 102 78 19mm 742.9mm

1" 49 7/8" 1" 53 1/4" 3/4" 29 1/4"

TB 030 108 19mm 1028.7mm TB 075 87 34mm 828.7mm TB 103 148 25.4mm 1184mm

3/4" 40 1/2" 1 5/16" 32 5/8" 1" 46 5/8"

TB 031 54 19mm 514.3 mm TB 076 134 30mm 1276.3mm TB 104 133 25.4mm 1266.8mm

3/4" 20 1/4" 1 3/16" 50 1/4" 1" 49 7/8"

TB 032 123 19mm 1171.6mm TB 077 106 19mm 1009.6mm TB 105 138 28.5mm 1314.4mm 3/4" 46 1/8" 3/4" 39 3/4" 1 1/8" 51 3/4"

TB 034 128 25.4mm 1219.2mm TB 078 98 19mm 933.4mm TB 106 128 25.4mm 1052.2mm1" 48" 3/4" 36 3/4" 1" 41"

TB 035 47 12.7mm 447.7mm TB 079 127 25.4mm 1209.7mm TB 107 117 19mm 1114.4mm1/2" 17 5/8" 1" 47 5/8" 3/4" 43 7/8"

TB 036 94 19mm 895.3mm TB 080 123 25.4mm 1171.6mm TB 108 110 15mm 1047.7mm

3/4" 35 1/4" 1" 46 1/8" 19/32" 41 1/4"

TB 037 99 15mm 945mm TB 081 111 20mm 1057.3mm TB 109 219 25.4mm 2086mm19/32" 37 1/5" 4/5" 41 5/8" 1" 82 1/8"

TB 038 99 15mm 943mm TB 082 75 20mm 714.4mm TB 110 219 25.4mm 2086mm

19/32" 37 1/8" 4/5" 28" 1" 82 1/8"

TB 039 99 19mm 945mm TB 083 119 25.4mm 1133.5mm TB 111 116 19mm 1104.9mm3/4" 37 1/5" 1" 44 5/8" 3/4" 43 1/2"

TB 040 101 25.4mm 962mm TB 084 130 25.4mm 1238.2mm TB 112 113 19mm 1076.3mm

1" 37 7/8" 1" 48 3/4" 3/4" 42 3/8"


2

6

Profiles and dimensions



TB 114 126 23.8mm 1200.1mm TB 142 124 24mm 1181.1mm TB 170 142 19mm 1136mm15/16" 47 1/4" 15/16" 46 1/2" 3/4" 44 3/4"


3/4" 44 5/8" 15/16" 39 3/4" 1" 44 5/8"

TB 116 98 19mm 933.4mm TB 144 107 24mm 1019.2mm TB 172 211 30mm 1688mm

3/4" 36 3/4" 15/16" 40 1/8" 1 3/16" 66 7/16"

TB 117 109 22mm 1038.2mm TB 145 107 24mm 1019.2mm TB 173 164 23mm 1562.1mm

7/8" 40 7/8" 15/16" 40 1/8" 48/53" 61 1/2"

TB 118 112 17mm 896mm TB 146 173 30mm 1384mm TB 174 110 14mm 1047.7mm2/3" 35 1/4" 1 3/16" 54 1/2" 5/9" 41 1/4"

TB 119 124 19mm 1181.1mm TB 147 137 25.4mm 1096mm TB 175 115 25.4mm 920mm

3/4" 46 7/16" 1" 43 1/7" 1" 36 2/9"

TB 120 134 25.4mm 1276.3mm TB 148 104 17mm 990.6mm TB 176 113 19mm 1076.3mm

1" 50 1/4" 2/3" 39" 3/4" 42 3/8"


3/4" 41 5/8" 13/16" 45 2/3" 1" 35 1/4"

TB 122 115 20mm 1095.4mm TB 150 118 22mm 944mm TB 178 91 19mm 866.8mm

4/5" 43 1/8" 7/8" 37 1/6" 3/4" 31 1/8"

TB 123 107 19mm 856mm TB 151 139 28mm 1112mm TB 179 145 22mm 1160mm

3/4" 33 5/7" 1 1/8" 43 7/9" 7/8" 45 21/32"

TB 124 123 19mm 1171.6mm TB 152 119 25.4mm 1133.5mm TB 180 228 31.8mm 1824mm

3/4" 46 1/8" 1" 44 5/8" 1 1/4" 71 5/8"

TB 125 178 25.4mm 1424mm TB 153 124 23.8mm 1181.1mm TB 181 93 25.4mm 885.8mm

1" 56" 15/16" 46 1/2" 1" 34 7/8"

TB 126 159 25.4mm 1272mm TB 154 193 36mm 1544mm TB 182 95 25.4mm 904.9mm

1" 50" 1 3/7" 60 4/5" 1" 35 5/8"

TB 127 120 18mm 1143mm TB 155 122 24mm 1162mm TB 183 239 35mm 1912mm5/7" 45" 15/16" 45 3/4" 1 3/8" 75 1/8"

TB 128 92 19mm 876.3mm TB 156 148 25.4mm 1409.7mm TB 184 125 26mm 1190.6mm3/4" 34 1/2" 1" 55 1/2" 1 1/32" 26 1/4"

TB 129 192 28mm 1828.8mm TB 157 179 31.8mm 1432mm TB 185 107 21.5mm 856mm1 1/8" 72" 1 1/4" 56 3/8" 6/7" 33 23/32"

TB 130 129 24mm 1228.7mm TB 158 122 19mm 1162mm TB 186 70 16mm 666.7mm

15/16" 48 3/8" 3/4" 45 3/4" 5/8" 26 1/4"

TB 131 127 25.4mm 1043.9mm TB 159 55 12.7mm 523.9mm TB 187 113 24mm 1076.3mm

1" 41" 1/2" 20 5/8" 15/16" 42 3/8"

TB 132 126 23.8mm 1200.1mm TB 160 108 24mm 1028.7mm TB 188 133 25.4mm 1266.8mm

15/16" 47 1/4" 15/16" 40 1/2" 1" 49 7/8"

TB 133 147 25.4mm 1176mm TB 161 101 24mm 962mm TB 189 113 17mm 1076.3mm1" 46 2/7" 15/16" 37 7/8" 2/3" 42 3/8"

TB 134 110 25.4mm 1047.7mm TB 162 112 19mm 896mm TB 190 209 34mm 1672mm1" 41 1/4" 3/4" 35 1/4" 1 5/16" 65 5/8"


TB 136 127 24mm 1016mm TB 164 95 19mm 904.9mm TB 192 169 34mm 1609.7mm

15/16" 40" 3/4" 35 5/8" 1 5/16" 63 3/8"

TB 137 151 19mm 1208mm TB 165 151 29mm 1438.3mm TB 193 196 28mm 1866.9mm

3/4" 47 5/9" 1 9/64" 56 5/8" 1 1/8" 73 3/8"

TB 138 163 26.7mm 1304mm TB 166 97 19mm 923.9mm TB 194 97 25.4mm 923.9mm

1 1/16" 51 1/3" 3/4" 36 3/8" 1" 36 3/8"

TB 139 149 25.4mm 1419.2mm TB 167 153 29mm 1457.3mm TB 195 257 32mm 2056mm1" 55 7/8" 1 9/64" 57 3/8" 1 1/4" 81"


3/4" 44 1/4" 1/2" 20 15/32" 1"

TB 141 107 21.1mm 856mm TB 169 159 25.4mm 1272mm TB 197 147 19mm 1176mm13/16" 33 5/7" 1" 50 1/32" 3/4"



TB 198 167 23mm 1590.7mm TB 226 155 24mm 1240mm TB 254 211 30mm 1688mm48/53" 62 5/8" 15/16" 48 5/6" 1 3/16" 66 1/2"

TB 199 163 26.7mm 1304mm TB 227 124 26mm 1181.1mm TB 255 202 30mm 1616mm

1 1/16" 51 3/8" 1 1/32" 46 1/2" 1 3/16" 63 5/8"

TB 200 191 31.8mm 1528mm TB 228 135 25.4mm 1080mm TB 256 154 29mm 1466.8mm

1 1/4" 60 3/16" 1" 42 1/2" 1 9/64" 57 3/4"

TB 201 121 29mm 968mm TB 229 123 19mm 1171.6mm TB 257 211 32mm 1688mm

1 9/64" 38 1/8" 3/4" 46 1/8" 1 1/4" 66 1/2"

TB 202 155 32mm 1240mm TB 230 124 29mm 1181.1mm TB 258 131 25.4mm 1247.8mm1 1/4" 48 7/8" 1 9/64" 46 1/2" 1" 49 1/8"


2/3" 41 5/8" 1 1/8" 90 3/8" 1 1/4" 46 1/2"


15/16" 46 1/4" 1 9/64" 46 1/8" 5/7" 45 3/8"


1" 51 3/8" 15/16" 40" 15/16" 33 3/8"


1 3/16" 49 1/8" 3/4" 46 1/8" 5/7" 46 1/2"

TB 207 299 30mm 2392mm TB 235 121 21.1mm 968mm TB 263 192 24mm 1828.8mm

1 3/16" 94 1/6" 13/16" 38 1/9" 15/16" 72"

TB 208 128 26mm 1024mm TB 236 117 21.1mm 936mm TB 264 108 25.4mm 1028.7mm

1 1/32" 40 5/16" 13/16" 36 6/7" 1" 40 1/2"

TB 209 241 34mm 1928mm TB 237 159 25.4mm 1272mm TB 265 146 28mm 1390.6mm

1 5/16" 76" 1" 50" 1 1/8" 31 1/2"

TB 210 129 22.3mm 1228.7mm TB 238 124 25.4mm 1181.1mm TB 266 125 22mm 1000mm

7/8" 48 3/8" 1" 46 1/2" 7/8" 39 3/8"

TB 211 113 21mm 1076.3mm TB 239 94 19mm 895.3mm TB 267 201 30mm 1608mm13/16" 42 3/8" 3/4" 35 1/4" 1 3/16" 63 1/3"

TB 212 103 25.4mm 981.1mm TB 240 193 36mm 1544mm TB 268 139 21mm 1324mm1" 38 5/8" 1 3/7" 60 4/5" 13/16" 52 1/8"

TB 213 70 15.9mm 666.7mm TB 241 97 19mm 923.9mm TB 269 144 23mm 1371.6mm5/8" 26 1/4" 3/4" 36 3/8" 48/53" 54"

TB 214 192 30mm 1536mm TB 242 137 25.4mm 1304.9mm TB 270 152 28mm 1447.8mm

1 3/16" 60 1/2" 1" 51 3/8" 1 1/8" 57"

TB 215 143 25.4mm 1144mm TB 243 89 19mm 847.7mm TB 271 191 36mm 1528mm

1" 45 1/32" 3/4" 33 3/8" 1 3/7" 60"


15/16" 47 5/8" 15/16" 42" 1" 33 3/8"

TB 217 143 21mm 1362.1mm TB 245 112 29mm 1066.8mm TB 273 200 34mm 1600mm13/16" 53 5/8" 1 9/64" 42" 1 5/16" 63"

TB 218 239 25.4mm 1912mm TB 246 150 29mm 1428.7mm TB 274 87 19mm 828.7mm1" 75 2/7" 1 9/64" 56 1/4" 3/4" 32 5/8"

TB 219 200 30mm 1600mm TB 247 126 26mm 1200.1mm TB 275 88 17mm 838.2mm1 3/16" 63" 1 1/32" 47 1/4" 2/3" 33"


1 1/4" 68 5/8" 1 1/4" 48 7/8" 7/8" 49 1/8"

TB 221 223 31.8mm 1784mm TB 249 133 25.4mm 1266.8mm TB 277 281 30mm 2248mm

1 1/4" 70 1/4" 1" 49 7/8" 1 3/16" 88 1/2"

TB 222 78 20mm 624mm special profile TB 250 225 30mm 1800mm TB 278 111 25.4mm 1057.3mm

4/5" 24 4/7" 1 3/16" 70 6/7" 1" 41 5/8"

TB 223 103 24mm 981.1mm TB 251 228 31.8mm 1824mm TB 279 197 24mm 1876.4mm15/16" 38 5/8" 1 1/4" 71 4/5" 15/16" 73 7/8"


15/16" 39" 48/53" 55 1/2" 19/32" 21 3/4"

TB 225 151 19mm 1208mm TB 253 265 32mm 2120mm TB 281 168 25.4mm 1344mm3/4" 47 5/9" 1 1/4" 83 1/2" 1" 53"



TB 282 105 22mm 1000.1mm TB 297 253 30mm 2024mm TB 312 104 22mm 990.6mm7/8" 39 3/8" 1 3/16" 79 2/3" 7/8" 39"

TB 283 99 25.4mm 943mm TB 298 211 34mm 1688mm TB 313 175 29mm 1401.8mm

1" 37 1/8" 1 5/16" 66 1/2" 1 9/64" 55 1/5"

TB 284 113 25.4mm 1076.3mm TB 299 119 19mm 1133.5mm TB 314 65 12.7mm 520.7mm

1" 42 3/8" 3/4" 44 5/8" 1/2" 20 1/2"

TB 285 225 30mm 1800mm TB 300 98 19mm 933.4mm TB 315 207 32mm 1656mm

1 3/16" 70 6/7" 3/4" 36 3/4" 1 1/4" 65 1/5"

TB 286 197 26mm 1576mm TB 301 141 25.4mm 1343mm TB 316 133 25.4mm 1064mm1 1/32" 62" 1" 52 7/8" 1" 41 8/9"

TB 287 195 32mm 1560mm TB 302 154 21.5mm 1232mm TB 317 153 25.4mm 1224mm

1 1/4" 61 3/7" 6/7" 48 1/2" 1" 48 1/5"

TB 288 116 29mm 928mm TB 303 191 31.8mm 1528mm TB 318 137 22mm 1096mm

1 9/64" 36 1/2" 1 1/4" 60 1/6" 7/8" 43 1/7"

TB 289 107 25.4mm 856mm TB 304 223 27mm 1784mm TB 319 146 28mm 1390.6mm

1" 33 5/7" 1 1/16" 70 1/4" 1 1/8" 31 1/2"

TB 290 76 25.4mm 608mm TB 305 171 24mm 1368mm TB 320 201 32mm 1608mm

1" 24" 15/16" 53 6/7" 1 1/4" 63 1/3"

TB 291 152 25.4mm 1216mm TB 306 150 23mm 1200mm TB 321 141 25.4mm 1343mm

1" 47 7/8" 48/53" 47 1/4" 1" 52 7/8"

TB 292 147 25.4mm 1176mm TB 307 223 27mm 1784mm TB 322 251 32mm 2008mm

1" 46 3/16" 1 1/16" 70 1/4" 1 1/4" 79 1/20"

TB 293 110 18mm 1047.7mm TB 308 123 21.5mm 986.5mm TB 323 259 32mm 2072mm

5/7" 41 1/4" 6/7" 38 5/6" 1 1/4" 81 4/7"

TB 294 129 25.4mm 1228.7mm TB 309 169 24mm 1352mm TB 324 110 22mm 881,1mm

1" 48 3/8" 15/16" 53 2/9" 7/8" 34 11/16 "

TB 295 201 30mm 1608mm TB 310 127 25.4mm 1209.7mm1 3/16" 63 1/3" 1" 47 5/8"

TB 296 138 23mm 1104mm TB 311 142 23mm 1352.5mm48/53 43 1/2" 48/53" 53 1/4"

Yes

Yes

Yes

Interference Engine?

In general, engines can be classified as either interference or non-interference engines. If a timingbelt fails on an interference type engine, the result can be costly damage to related enginecomponents. Many late model vehicles use an interference engine to reduce vehicle weight andunderhood space. Knowing which type of engine is in a particular vehicle can influence the serviceand preventative maintenance schedules.

Illustrated below is what occurs when a timing belt breaks on these different types of engines:

Non-interference engine:

• the engine will run freely with no contactbetween the valves and the piston

Interference engine:

• the engine will not “freewheel”, whichcould lead to severe valve and pistondamage if the timing belt breaks while theengine is running

An asterisk in front of the belt number identifies the

Interference Engines in this application guide.

Example: *TB 191

NON-INTERFERENCE INTERFERENCE

Listed below are general guidelines to follow when replacing a timing belt. Caution: Since all removal and installation procedures vary according tomanufacturer, follow published manufacturers’ recommendedprocedures to ensure proper removal and installation on your vehicle.

• Disconnect the ground cable from the battery.• Remove all drive belts, pulleys, or hoses that could impede removal

and installation.• Turn the crankshaft (in the running direction) to “top dead center”.

Align the marking on the engine case with the markings on thecrankshaft vibration damper and camshaft. (illustration 1)

• Loosen the adjusting screw of the tensioning pulley.• Pull the tensioning pulley away from the timing belt and re-tighten the

tensioning pulley adjusting screw back to its original position.(illustration 2)

• Remove the timing belt (if the belt can not be easily removed by hand, re-check the preceding steps).

• Check tensioner, smooth back idler pulleys, belt sprockets, and othercomponents for wear or damage. If necessary replace them.(illustration 3)

• Properly align all timing marks.• Place the new timing belt on the drive (Caution: never force, twist or

kink the belt while replacing. Bending the belt sharper than thediameter of the smallest system pulley can cause internal corddamage to the belt).

• Loosen the adjusting screw of the tensioning pulley allowing the pulleyto move freely.

• Turn the adjusting screw carefully into its final position (make properallowances for the spring pressure). If the tensioning pulley is notautomatic, tension the timing belt as recommended by themanufacturer using the suggested tensioning gauges and toolsrequired. (illustration 4)

• Re-check the alignment of all timing marks.• Rotate the crankshaft at least two complete revolutions (in the running

direction) to ensure the timing belt is properly installed and tensioned.• Re-check the alignment of all timing marks.• Put the tensioning pulley in its original position and tighten the screws

to the specified torque setting. (illustration 5)

• Replace the timing belt cover as well as any components removedduring the belt replacement procedure.

• Reconnect the ground cable to the battery.• Start the engine.• If any adjustments are necessary, begin anew by disconnecting the

ground cable from the battery.• Dispose of the replaced belt and other components in an environ-

mentally friendly manner.

ill. 1

ill. 2

ill. 3

ill. 4

ill. 5

Changing the belt

Safety Tips

• When installing belts, only use the tools suggested by themanufacturer. The belt must be placed in position manually. Under nocircumstances, should the belt be pried or forced with rim leversscrew drivers, etc. onto the toothed pulleys or rolled onto or overflanged pulleys. Such action will damage the belt. (illustration 6)

• Never allow caustic or corrosive liquids to come into contact with thebelt or drive components. These products can damage the belt and/orplastic parts. (illustration 7)

• Keep the belt well away from oil mist, dripping oil and other chemicals.It is recommended that the belt be kept in its original box until time ofinstallation.

• Always comply with the vehicle manufacturer’s installationinstructions. These are usually printed in the owner’s manual in thesection explaining timing belt maintenance and replacement.

•it in the engine compartment where it can be easily read.

• Replace all defective components, within the timing system, duringthe belt replacement procedure.

• Do not crimp belt or pry onto pulley. Follow shop manual proceduresfor removal and installation.

Storage details

ill. 6

ill. 7

Compliance with storage recommendations will extend the product’s “shelf life” and insure the beltsmaintain their original performance properties.

Please note timing belts should always be left in their original packaging until time of installation. Belts must never be crimped or buckled, as this could damage the integrity and stability of the tensionmembers. Keep belts away from highly flammable, aggressive materials, lubricants or acids.

Fill out the sticker accompanying every timing belt and place

Belts should be stored out of direct sunlight, in a dry location with an ambient temperature of 60-80 F.

Problem and causes Solution

P: Noise from belt while running

1. Tension set too high: belt whines, whistles

2. Tension set too low: belt flaps against the cover or other components

P: Edge Wear

1. Pulleys not properly aligned withone another. Belt runs againstflanged pulley

2. Pulley “cocked” – belt notproperly aligned

3. Flanged pulley is damaged4. Bearing-play in components

resulting in pulley “wobble”

P: Fabric wear on the belt tooth

1. Belt over-tensioned2. Belt is over-heating3. Timing belt sprocket is worn

P: Severe wear on the sides of

the belt teeth, tooth cracking,

or sheared tooth on belt

1. Incorrect tension – too high; too low

2. Trapped foreign matter3. Frozen or jammed timing belt

pulley or tensioning pulley

S: Noise from belt while running

1-2. Adjust tension properly

S: Edge Wear

1-2. Check pulley alignment,replace or adjust parts causingmis-alignment. Replace thebelt

3-4. Replace idler/tensioning pulley.Change the belt

S: Fabric wear on the belt tooth

1. Change the belt and adjusttension properly

2. Determine cause (overtensioning) or heat source. Take corrective action. Changethe belt

3. Replace the timing pelt sprocketand replace the belt

S: Severe wear on the sides of

the belt teeth, tooth cracking,

or sheared tooth on belt

1. Change the belt. Adjust thetension properly

2. Remove foreign matter. Checkfor proper fit of the timing beltcover. Change the belt

3. Determine cause (e.g. defectivebearing) Replace defective partsor component. Change the belt

Problem and causes Solution

P: Grooves or marks on the side

of the belt teeth

1. Foreign matter in the timing beltdrive

2. Scars on the teeth of the timingbelt sprocket caused by foreignmatter or tools used duringinstallation

3. Timing belt damaged before orduring installation

P: Cracks on the back of the

timing belt

1. Ambient temperature too high;too low

2. Contact with foreign matter3. Back idler pulley not operating

properly4. Aging of belt

P: Broken timing belt

1. Foreign matter in the drive2. Belt contact with loose

component or foreign matter3. Excessive tensioning4. Belt was damaged

(e.g. crimped) before or duringinstallation

P: System Components

1. Bearing play2. Damaged running surface

S: Grooves or marks on the side

of the belt teeth

1. Remove the foreign matter.Install new belt. Check to insurethe cover is seated properly

2. Replace the damaged timingbelt sprocket. Change the belt

3. Change the belt using correctprocedures

S: Cracks on the back of the

timing belt

1. Determine cause of abnormaltemperature (e.g. check coldperformance). Repair problem.Replace the belt

2. Change the belt. Check that thebelt cover is seated properly

3. Replace the belt

S: Broken timing belt

1. Remove the foreign matter.Install new belt

2. Determine cause. Eliminateforeign matter. Repair or replaceloose components. Replace thebelt. Check that the belt cover isseated properly

3. Change the belt. Check forproper belt tensioning

4. Change the belt and installproperly

S: Defective System

Components

1. Replace the idler, tensionerand/or guide pulley

Timing Belt Replacement Recommendations

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Transcript of Timing Belt Replacement Recommendations