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timing belt : troubleshooting What is the best solution for a problem found with a timing belt? The troubleshooting guide below is a great place to start diagnosing and solving timing belt problems. Problem and cause Running noises from belt •Tension too high: Belt whines, whistles •Tension too low: Belt knocks against covering Solution Adjust tension properly Edge wear •Belt not parallel to axis: Belt runs against flanged pulley •Wheels axially off-center: Timing belt cannot be properly aligned •Flanged pulley has flaws •Bearing play in components Check drive, line up or, if necessary, replace any non-aligned pulleys, change the belt Replace idler/tensioning pulleys, change the belt Fabric wear in the tooth root •Belt excessively tensioned •Belt is overheating •Timing belt pulley is worn out Change the belt, adjust tension properly Find out cause (e.g. check cold performance), take corrective action, change the belt Replace timing belt pulley, change the belt Unacceptable wear of tooth flanks/base separating and tooth shearing •Tension too high/too low Change the belt, adjust tension properly •Trapped foreign matter •Jammed timing belt pulley or tensioning pulley Remove foreign matter, check covering is seated properly, change the belt Find out cause (e.g. defective bearing), take corrective action, change the belt Teeth and fabric separating from belt body •Leaks in the engine or engine compartment (e.g. escape of oil, antifreeze, etc.) Repair leak(s), change the belt Running marks on teeth side •Foreign matter in timing belt drive •Flaws in teeth of timing belt pulley caused by foreign matter or tools during mounting •Timing belt damaged before/during mounting Cracks on back of timing belt •Ambient temperature too high/too low •Contact with foreign media •Back idler pulley sluggish •Aging Timing belt snaps •Foreign matter in the drive •Contact with foreign media •Excessive tensioning •Belt was crimped before/during mounting Defective system components •Bearing play •Damaged running surface Remove foreign matter, change the belt, check the cover is seated properly Replace timing belt pulley, change the belt, ensuring it is properly mounted Change the belt, ensuring it is properly mounted Find out cause (e.g. check cold performance), take corrective action, change the belt Change the belt, check the covering is seated properly Replace pulley, change the belt Change the belt Remove foreign matter/media, change the belt, check the cover is seated properly Change the belt, check the cover is seated properly Change the belt, adjust tension properly Change the belt and mount it properly Replace the idler, tensioning and/or guide pulley
timing belt : changing the belt How do you change the timing belt properly? Here are some points to remember when changing your belts to ensure the drive functions properly. Safety tips Tip 1 •When installing belts, only use the correct tool. The belt must be placed in position manually. In no circumstances should timing belts be forced, e.g. with rim levers, onto toothed pulleys or rolled over flanged pulleys. Such action would damage the tension member. tip 2 •Never allow caustic or corrosive liquids to come into contact with the belt drive, as they could damage the plastic parts. •Keep the belt well away from oil mist, dripping oil, and other chemicals. •Always comply with the installation instructions of the vehicle manufacturer. These are printed in the owner’s manual in the section explaining how to change a timing belt. •Fill in the change interval sticker accompanying every new ContiTech timing belt and stick it in the engine compartment where it can easily be seen. •Regardless of which components are defective – whether tensioning pulley, idler pulley, or guide pulley – all these components must be replaced. Changing a timing belt Step 1 •Disconnect the earth cable from the battery. •Remove all drive belts, pulleys, or hoses that could get in the way when the timing belt is removed. •Remove the timing belt cover. •Turn the crankshaft in the running direction of the engine as far as top dead center, and bring marking on the engine case into line with the marking on the crankshaft vibration damper and the camshaft. Step 2 •Loosen the adjusting screw of the tensioning pulley. •Pull the tensioning pulley away from the timing belt and screw the tensioning pulley tight again. Step 3 •Remove the timing belt. •Check tensioner, smooth back idler pulleys and belt pulleys for wear or damage. If necessary, replace them. Step 4 •Adjust all markings until they are properly aligned. •Place the new timing belt on the pulleys. •Loosen the adjusting screw of the tensioning pulley, allowing the pulley to move freely. •Turn the adjusting screw carefully into its final position (make proper allowance for the spring pressure). If the tensioning pulley is not automatic, tension the timing belt as specified by the vehicle manufacturer, using the tensioning device provided for this. Step 5 •Check the alignment of the markings. •Rotate the crankshaft by at least two complete revolutions in the running direction of the engine to ensure the timing belt is properly tensioned by the tensioning pulley. •Check the alignment of the markings once again. •Put the tensioning pulley in its intended position and tighten the screws with the specified torque setting. •Refit the timing belt cover as well as all drive belts, pulleys, and hoses that were removed. •Reconnect the earth cable to the battery and start the engine. •Make any adjustments that are necessary. •Dispose of the replaced belt in an environmentally friendly way.
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Page 4 and 5: Timing Belt and Timing Belt Kit Nam
Page 8 and 9: TB No. Teeth Width mm/" Length mm/"
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Page 13 and 14: serpentine belts : troubleshooting
Page 15 and 16: serpentine belts : Changing the bel
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Passenger Cars & Light Trucks 2013
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HONDA - Cont'd. PRELUDE - Cont'd. 4
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HYUNDAI - Cont'd. ACCENT - Cont'd.
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MITSUBISHI - Cont'd. EXPO - Cont'd.
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MITSUBISHI - Cont'd. MONTERO - Cont
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T Illustrations PST0001P PST0002P P
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TIllustrations TB095K1 TB101K1 TB10
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TIllustrations TB172K1 TB173-174K1
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TIllustrations TB232-168K1 TB232-16
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TIllustrations TB255K1 TB256-168K1
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TIllustrations TB279-280K1 TB281K1
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Illustrations TB139LK1 TB143LK1 TB1
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Illustrations TB216-186LK1 TB218LK1
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Illustrations TB287LK1-WH TB295LK1
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Illustrations TB335LK1 TB340-341LK1
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P Illustrations PP193LK2 PP194LK1 P
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CROSS REFERENCE-Manufacturer To CRP
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ACURA CRP # 13405PTO004 TB186 13440
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GATES CRP # T228 TB228 T229 TB229 T
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NAPA CRP # 250114 TB114 250117 TB11
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GOODYEAR CRP # GTK0227 TB227K1 GTK0
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