"

Select Your Vehicle

Limited Time Deal: Join the BAP Buyers Club and receive 10% off all orders and flat $25 next day air shipping: Click Here

International Orders

International Customers, please review our international shipping policies for placing orders and to know more about Shipping, Payment, and Warranties.

Questions?

Our USA based
parts pros can help.

Click Here

Industry Leading Warranty

Click to learn more

Community

Home >   How To >   How to Replace Timing Belt >   Timing Belt Troubleshooting Guide

Timing Belt Troubleshooting Guide

 

A timing belt, which connects the engine's crankshaft and camshaft, synchronizes the movement of the valves and pistons and ensures that ignition fires on time. It is responsible for turning the camshaft half the speed of the crankshaft. On some engines, it also drives the oil pump, water pump and balance shafts. Driving tendencies and temperature are just a couple of factors that play into the lifetime of a timing belt. One of the common consequences of a bad timing belt is an engine misfire, which in turn decreases the engine's power output and efficiency. A faulty timing belt will also produce more exhaust gas than usual. In case of a timing belt that has failed completely, the engine won't start at all.

 

The recommended time to replace the timing belt is usually suggested in the owners' manual. It is usually recommended to do so from 60,000 to 105,000 miles; it is ideal to replace the belt in 80,000 miles.

 

The troubleshooting guide below explains the problems and causes of a bad timing belt and their corresponding solution:

 

PROBLEM AND CAUSE SOLUTION

RUNNING NOISES FROM BELT
⚫ Tension too high: Belt whines and whistles

⚫ Tension too low: Belt knocks against covering
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
Check drive, line up or, if necessary, replace any non-aligned pulleys, change the belt
⚫ Flanged pulley has flaws

⚫ Bearing play in components
Replace idler/tensioning pulleys, change the belt

FABRIC WEAR IN THE TOOTH ROOT
⚫ Belt excess, tensioned Change the belt, adjust tension properly
⚫ Belt is overheating Find out cause (eg. check cold performance), take corrective action, change the belt
⚫ Timing belt pulley is worn out Replace timing belt pulley, change the belt

UNACCEPTABLE WEAR OF TOOTH FLANKS/BASE SEPARATING AND TOOTH SHEARING
⚫ Tension too high/low Change the belt, adjust tension properly
⚫ Trapped foreign matter Remove foreign matter, check covering is seated properly,Change the belt
⚫ Jammed timing belt pulley or tensioning pulley Find out cause (eg. 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 Remove foreign matter,change the belt, check the cover is seated properly
⚫ Flaws in teeth of timing belt pulley caused by foreign matter or tools during mounting Replace timimg belt pulley, change the belt ensuring it is properly mounted
⚫ Timing belt damaged before/during mounting Change the belt ensuring it is properly mounted

CRACKS ON BACK OF TIMING BELT
⚫ Ambient temperature too high/too low Find out cause (eg. check cold performance), take corrective action, change the belt
⚫ Contact with foreign media Change the belt, check the covering is seated properly
⚫ Back idler pulley sluggish Replace pulley, change the belt
⚫ Aging Change the belt

TIMING BELT SNAPS
⚫ Foreign matter in the drive Remove foreign matter/media,change the belt check the cover is seated properly
⚫ Contact with foreign media Change the belt, check the covering is seated properly
⚫ Excessive tensioning Change the belt, adjust tension properly
⚫ Belt was crimped before/during mounting Change the belt and mount it properly

DEFECTIVE SYSTEM COMPONENTS
⚫ Bearing play

⚫ Damaged running surface
Repalce the idler, tensioning and/or guide pulley

 

Buy Auto Parts can help you find the timing belt for your car!

 

Buy Auto Parts is the best place online to get replacement timing belts that come with a warranty at unbeatable prices. We stock a wide range of OEM replacement and aftermarket parts for every make and model. To find the right timing belt for your car, simply tell us your car's year, make and model. Your order will be shipped from the warehouse closest to your location. We offer free shipping for purchases over $50. Our products have been throughly tested to meet or exceed industry standards. You can reach us on our support line at or leave us an email at [email protected], if you need help in choosing the part. Please feel free to leave us an online review. We value your feedback!

 

"How To" Home  |  BuyAutoParts Home