Auto timing Belt

Auto Timing belt

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Certain engines with overhead camshafts have timing belts that have a limited life span. Car makers use these belts instead of more durable chains because chains are noisier and cost more to manufacture.  Your vehicle owner’s manual will recommend at what mileage the timing belt must be replaced.  These intervals range from every 60,000 miles to every 105,000 miles.  To see what is recommended for your engine, click on the link at the bottom of this article.

The job of the timing belt is to turn the camshaft(s) at exactly 1/2 the speed of the crankshaft while maintaining a precise alignment.  This means that the crankshaft will make two revolutions for every revolution of the camshaft.  Engines will have at least one camshaft, or as many as four camshafts in some of the V-type engines.  The camshaft causes the intake and exhaust valves to open and close in time with the pistons which move up and down in the cylinders.  The valves must open and close at exactly the right time in relationship to the piston movement in order for the engine to run properly.  For more information on how this works, go to “A Short Course on Engines

There are two types of engines that use timing belts.  They are described as: “Interference Engines” and “Non-interference Engines”  The difference lies in the proximity between the valves and the pistons.  On an interference engine, if the timing belt slips even one notch, the piston can crash into an open valve causing serious engine damage by bending valves and breaking pistons.  Non-interference engines will usually not self destruct, but in either case if the belt fails, the engine will immediately shut down leaving you stranded.  The link at the bottom of this article will tell you which category your engine falls under.

Timing belts fail without warning and on some vehicles, are almost as hard to check as they are to change.  In most cases, your only protection is to change the belt at the recommended intervals. Timing belt replacement is not a cheap job but it is far less costly than the alternative.

Some technicians may recommend that you replace the water pump during a timing belt job even if there is nothing wrong with it.  This is because 90% of the labor to change the water pump has already been done with the timing belt job and some technicians consider it good insurance to replace the pump at this time.  My feeling is that some water pumps can last the life of the car but many do fail and will cost big money to replace at a later date.  So ask your technician what his experience is with the water pump on your model car and look at how long you plan to keep the car. This way, at least you will be making an informed roll of the dice.

 Avialablty At Umar Farooq Belting
Available : neoprene (CR) and hydrogenated NBR (HNBR)
Type Pitch Tooth height Belt thickness Type Pitch Tooth height Belt thickness
R(MR) 9.525 3.54 5.69 ZR 9.525 3.20 5.40>
Y(MY) 8 3.11 5.21 ZAS 9.525 2.32 4.62
ZBS 9.525 2.80 5.10 ZB 9.525 2.29 4.50
YU 8 3.109 5.20 RHD 9.525 3.50 5.70
RU 9.525 3.56 5.70 RHX 9.525 2.617 4.80
ZA 9.525 1.91 4.10 RPP 9.525 2.25 4.50
FS8M 8 3.05 5.30 SL 9.525 3.40 5.50
ZD 9.525 3.50 5.50

 

 

Automotive Timing Belt Mold List (List data adjusted after 6 month)By UFB
Sizes Availabe at Umar Farooq Belting
Type Tooth No.
R(MR)  58 68 70 78 89 92 93 94 95 96 97 98 99 101 102 103 104 105 106 107 108 109 110 111 112 113 114 117 123 124 125 127 129 130 133 134 136 147 148 149 150 151 153 157 158 177
Y(MY) 99 100 101 103 106 107 111 112 117 113 121 123 124 127 128 129 131 137 142 143 144 145 146 159 169 177 178 191 211
ZBS 55 63 65 69 76 83 87 91 92 101 112 117 119 120 122 123 130 134 136 137 141 142 143 149 163
YU 61 65 76 80 83 99 100 101 103 104 105 106 107 109 110 111 112 113 115 117 121 123 125 130 131 132 133 135 140 141 142 145 146 147 153 154 155 156 159 162 164 165 168 173 177 179 187 191 193 195 197 201 207 210 211 219 223 226 228 232 234 251 257 259 265 281
RU 58 59 70 72 76 79 83 85 88 89 91 92 93 95 97 98 100 101 103 104 105 106 107 108 109 110 111 112 113 114 116 117 118 119 120 122 123 124 125 126 127 130 131 132 133 134 135 136 145 149 151 152 153 154 157 158 163 176 177
ZA 54 55 63 69 76 83 84 85 87 88 89 90 91 92 93 94 95 98 102 103 104 106 108 109 110 111 115 116 117 120 121 122 123 124 126 127 133 139 142 144 146
S8M 65 66 70 73 75 79 80 82 85 89 90 91 95 100 103 105 106 109 110 112 118 120 122 123 125 129 130 132 137 138 140 141 142 144 145 146 148 149 150 151 152 156 160 162 163 164 165 168 169 170 171 173 175 179 180 191 192 200 206 209 210 212 216 220 225 239 250 250 253
Also Available: R(MR) Y(MY) RU YU ZA ZB ZC ZD ZAS RHD SHX SRP
on Umar Farooq Belting

 


Automotive Timing Belt Mold List (List data adjusted After 6 month)by UFB

Automotive Timing belt raw materials: high-quality Japanese imports of neoprene (or hydrogenated nitrile rubber) as the main raw materials, distribution of the supplies, a variety of different uses; skeleton materials for the Japanese import quality glass fiber cord; nylon belt tooth surface 66 high elastic fabrics do protection, and in strict accordance with the technical specifications produced. A look clean, full profile, long service life, low noise characteristics.Characteristics Automotive Timing belt
Neoprene synchronous belt:
Heat is good – can be at 120 ° C and below, the working environment and long-term use;
Anti-aging is good – especially ozone-resistant properties must gifted;
Good chemical stability: In addition to strong oxidizing acid, the chemical resistance of the general erosion;
Fire water-resistant properties well;Hydrogenated nitrile rubber band:
Oil resistance excellent – oil resistance with very low inflation, higher oil resistance;
Durability good – dynamic performance than chloroprene rubber belt for the gifted, is the first choice in the luxury car drive belt;
Wear properties gifted – wear than small chloroprene rubber belt to reduce the noise, effectively extending the service life of the belt; HNBR Automotive Timing belt in the application:
Hyundai Motor because of energy-saving, environmental protection, comfort, and security requirements increasing, making the whole engine room structure complex, compact, high working temperature, the rubber pieces which should have high temperatures performance. With the improved engine lubrication technology, the lubricants used in a new additive, in the engine oil resistance of the rubber pieces to a higher demand. On the other hand, long maintenance period, the durability of rubber pieces there are increasingly high requirements. Hyundai Motor rubber pieces require oil resistance in certain conditions in the -40 ° C to +150 ° C transmission belt is the important automotive rubber parts, including OHC engine when used with the regulation that is synchronous belt, automotive auxiliary drive V-belt use in cars and multi-wedge zone and the newly developed CVT institutions (CTV) by the variable V-belt. Since 1975 HNBR announcement of the first patents, HNBR is becoming today’s world car production preferred standard synchronous belt elastomer material.

Modern cars on the synchronous belt specific requirements:
Durability increase 1.5 times higher than the bandwidth reduced 20%; increased 10 ° C heat. Synchronous belt by the rubber, and fiber tensile body (fiberglass or Kevlar), and composed of nylon cloth tooth complex. HNBR manufactured synchronous belt whether fatigue life, or the water-resistant properties than chloroprene rubber and chlorosulfonated polyethylene manufacturing synchronous belt performance much better.

Thaks Your perchasing from Umar Farooq Belting