Timing belt replacement should be left to the pros. It can be complicated to replace the timing belt on most engines, especially those with dual camshafts or lots of drive accessories that need to be removed.

A timing belt is similar to an engine drive belt, except timing belts have teeth. In many engines, timing belts have replaced metal timing chains (similar to a bicycle chain) connecting the camshaft and crankshaft gears. The camshaft and crankshaft must work in perfect harmony, called valve timing, during the four-stroke combustion cycle (intake, compression, power, exhaust).

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It pays to buy a timing belt kit rather than the individual items. Depending on the specific make and model, a typical timing belt kit ($100 to $500) includes a timing belt, timing belt tensioner, idler gears or pulleys, water pump, gaskets, O-rings and seals and other hardware.

Engines using timing chains can also be interference or non-interference engines. Timing belts are usually molded from rubber or neoprene, have strong fibers or steel running the length of the belt (similar to a tire) and produce less noise than metal timing chains. This makes them strong and durable. But they don’t last forever.

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Consult a repair manual to see if you can easily remove the timing belt cover. A repair manual is different from an owner’s manual because it lists step-by-step repair procedures. Most auto parts stores carry vehicle repair manuals, and many lend them to their customers at no cost.

In many cases, special tools are needed to correctly install a timing belt. Plus, other parts may need replacing. Timing gear indexing (precisely aligning the camshaft gears and crankshaft gear to the manufacturers specs) is critical. Even if one gear is one tooth “off,” engine valve timing will be out of sync, damaging your engine or causing it to run rough.

Amatrol’s Machine Tool Chip Conveyor Learning System (97-ME4E) adds to Mechanical Drives training (970-ME1) to teach chip conveyor installation, operation, adjustment, conveyor belt removal, conveyor maintenance, and conveyor troubleshooting.

This course’s curriculum covers a broad range of topics, including: safety rules for laser alignment system operation; the operation of an SKF laser shaft alignment system; and how to align two shaft s using a laser alignment system. The curriculum for the laser shaft alignment learning system is presented in an interactive multimedia format. This multimedia features all of the content from Amatrol’s printed curriculum and adds stunning 3D graphics, video, audio voiceovers, and interactive quizzes.

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The Laser Shaft Alignment Learning System (97-ME2A) covers the installation, operation, and applications of laser alignment in a variety of industrial scenarios.

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The price the pros charge to replace a timing belt ($350 to $1,500) varies depending on the engine, make, model and year. It also matters whether an independent repair shop or dealer’s service department makes the repair.

Timing belts are a maintenance item; they can wear out and fail without warning. Check your owner’s manual. It pays to know which kind of engine you have and the recommended replacement intervals.

Misalignment of power transmission system components is a major cause of excess wear and premature machine failure. When a misaligned machine is allowed to operate uncorrected, the resulting vibration will eventually cause bearing, shaft, seal, and coupling failure. This is why laser alignment systems are so vital. Within the 97-ME2A, learners will practice hands-on laser alignment skills, such as: install and align a power transmission system using a jack bolt motor base; using a laser alignment system to correct soft foot; and determine shaft alignment tolerances for a given machine installation.

Many timing belt covers are difficult reach, making visual access to the belt impossible. If you can’t get to the cover without taking half the engine compartment apart, leave it to the pros to determine if your vehicle’s timing belt needs to be replaced.

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Whether you or your mechanic replaces the timing belt, it’s always a good idea to replace these other components at the same time.

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There is no simple answer. First, check your owner’s manual for the recommended maintenance schedule. Some manufacturers recommend replacing the timing belt every 30,000 miles, while others suggest 120,000 miles. Several other factors should be part of the equation when considering replacing a timing belt, including:

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Amatrol's laser shaft alignment eLearning course features interactive eLearning curriculum that integrates various types of learning methods to create an engaging, effective learning experience. Amatrol’s multimedia eLearning curriculum includes text with voiceovers, videos, 3D animations, pictures, and interactive activities, quizzes, and self-reviews.

Amatrol’s Plain Bearing Machine Tool Axis Learning System (97-ME4B) adds to the Mechanical Drives 1 Learning System (970-ME1) and the Mechanical Drives 4 Learning System (97-ME4).

If you can get to the belt, it should be taut, with about a 1/4-in. to 1/2-in. deflection when pressed with your thumb along its longest run between gears. It should be smooth and flat (no rounded edges), not glossy or shiny, have no chunks missing, be free of large cracks or peeling and show no signs of fraying. Small surface cracks are okay, but spider cracking on the surface signals extreme wear.

Timing belts themselves are relatively inexpensive but can easily cause thousands of dollars of damage if they break while the engine is running.

Engines come in two configurations: Interference and non-interference. When a timing belt fails the camshaft(s) stops turning and the valves stop moving, but the crankshaft still rotates for a few seconds. An interference engine has insufficient clearance between the valves and pistons. Because the crankshaft keeps rotating, pistons will slam into any valves stuck in the open position, causing catastrophic engine damage. A timing belt failure in a non-interference engine will leave you inconveniently stranded.

Amatrol eLearning is easy-to-use for both students and instructors. Its web-based interface is simple to navigate and available on any WebGL-compatible Internet browser. Instructors love Amatrol eLearning for its simple, yet sophisticated Learning Management System (LMS). The LMS allows instructors to create custom courses, monitor student participation, track course progress, assess knowledge levels prior to a course, and test knowledge levels after completion. Learners appreciate the fact that they can start and stop as needed, moving through each Amatrol course at their own pace. If a self-review reveals that they didn’t understand a particular topic as well as they thought they did, they can revisit it before moving on.

A Student Reference Guide sourced from the system’s interactive eLearning includes the entire series’ technical content from the learning objectives.

Amatrol’s Floor-Standing Belt Conveyor Learning System (97-ME4D) adds to Mechanical Drives training (970-ME1) to teach skills related to flat belt conveyors, such as flat belt conveyor operation, adjustment, maintenance, and more.

Have you ever wondered if it's time to replace a timing belt? For the answer, listen to your engine and follow your vehicle's maintenance schedule.

Amatrol’s Roller Pack Machine Tool Axis Learning System (97-ME4A) adds to the Mechanical Drives training system (970-ME1) to teach machine tool axis drives based on the roller-pack type bearing.

Amatrol’s Predictive Maintenance Vibration Analysis Learning System (97-ME5A) adds to Mechanical Drives 1 (970-ME1) to teach how to use vibration analysis to determine when to perform  power transmission component maintenance.

Amatrol’s 97-ME2A includes a laser alignment system, two measuring units, two shaft v-brackets, two locking chains, and a motor mount horizontal adjustment assembly. Amatrol learning systems are composed of heavy-duty components that provide learners with real-world equipment they’ll recognize on the job and already understand how to use. These components will be used to study topics like rough alignment, laser shaft alignment installation, soft foot correction, and laser shaft alignment operation and analysis.

Amatrol’s Mechanical Drives 3 Learning System (97-ME3) covers plain bearings, ball bearings, roller bearings, anti-friction bearing selection and maintenance, gaskets, seals, advanced gear drives, and gear drive selection and maintenance.

The Laser Shaft Alignment Learning System (97-ME2A) covers the installation, operation, and applications of laser alignment in a variety of industrial scenarios. Laser shaft alignment is the preferred method of shaft alignment among maintenance and plant engineering personnel due to its superior efficiency and accuracy over older methods like the dial indicator method or the straight edge and feeler gauge method. Laser alignment systems also avoid problems such as sagging indicators, reading resolution error, and reading parallax error. These components add to the Mechanical Drives 2 Learning System (97-ME2) and the Mechanical Drives 1 Learning System (970-ME1).