What do you need to know about timing belts?
Timing belt is a type of synchronous belt manufactured from reinforced rubber with fiberglass consisting of teeth similar to gears. Multiple pulleys (such as driver, Driven and Idler) along with timing belts are used to transfer synchronous motion from one shaft to another shaft.
How do you measure a timing belt pulley?
There should be two (2) measurements for this since the majority of timing belt drives has a means in place for tensioning the belts. The two distances required will have one of the shafts in the all the way forward position and the other in the all the way backward position. Count the number of teeth on both timing belt pulleys.
How to identify a polychain GT style timing belt?
If the valley between the teeth is flat than it is and PolyChain GT style timing belt. You should also look for identifying numbers and/or letters on the pulleys themselves to help in the timing belt tooth profile identification.
What is the difference between rubber and polyurethane timing belts?
Note the construction of the timing belt. Rubber construction is extremely flexible while a polyurethane construction is plastic like and has little flexibility Measure the pitch (see diagram). This is the distance in millimeters (mm) and/or inches between the center of the crown of one tooth and the center of the crown of the tooth adjacent to it.
What should I do if my timing belt is off?
Being off even a half tooth on some engines will be enough to cause trouble and means the job needs to be done again. After the belt is installed and the tensioner pin has been released, be sure to crank the engine over by hand a few times at least to make sure the timing marks line up at TDC each time.
How to replace timing belt, timing balancer, Honda Accord?
Rotate the crank pulley 5-6 revolutions counterclockwise, and ensure TDC marks are still in line. Install the upper cover and tighten bolts. Install valve cover and tighten bolts. Reconnect PCV and hose to intake tube. Re-install spark plug wires. Refill the coolant. With cap off, run the car until it reaches operating temperatures.
Why do timing belts need to be tensioned?
The beauty of timing belts are that they have self-tensioners that are made to keep the belt tension constant to prevent loss of power or worse yet to keep the engine from jumping time and ruining the engine. They have idler pulley’s that also keep the tension constant as the belts age and stretch.
How to time production lines in line balancing?
In line balancing, you consider the work content for each process in the line. In this post on timing the line, you consider when a process should start. There are three different options on how to time the production lines. The “easiest” one is an unstructured approach.
One of the most misunderstood services on today’s vehicles is the maintenance and replacement of the timing belt. The most common question we as a service facility usually hear is what exactly is a timing belt?
Can you remove the tensioner on a timing belt?
Keep testing yourself! Loosen the mounting bolt (s) holding the belt tensioner using any special cam holding tools, while following the service manual. Do not remove the tensioner completely unless replacing it.
Can a broken timing belt be removed on an interference engine?
Don’t do this on interference engines unless you’re sure the belt is still intact. If you have not already bent your valves with a broken timing belt, you will likely do so if you spin the crankshaft without the camshaft spinning. Determine if the harmonic balancer pulley needs to be removed to remove the timing belt cover.
Can a harmonic balancer be removed from a timing belt?
Determine if the harmonic balancer pulley needs to be removed to remove the timing belt cover. Often, the cover saddles over the end of the crankshaft, and this pulley will not allow you to remove the cover without first removing it.
WHAT IS A TIMING BELT? As comedians tell us, timing is everything – advice that is equally pertinent for an engine, the internal parts of which are kept millimetres apart, often while rotating at high speed, which demands a precise degree of synchronisation.
How long to change timing belt on GM 3.4l DOHC?
GM’s 3.4L DOHC has a labor time of 4.5 hours to change the timing belt! The first step in replacing an OHC timing belt that is still intact is usually to rotate the crank until the timing marks indicate top dead center.
How many pulleys does a timing belt bear?
Timing belts tend to bear against at least one tensioner and idler, plus at least two pulleys or more. If your timing belt runs the water pump, check for any pools of coolant that may collect beneath the car when it is stationary.
Why does my car’s timing belt keep cracking?
Over time, their bearings may dry out, causing a squeak that should be heeded. In some cases, idlers and tensioners can seize, throwing the timing belt from its pulleys and causing extensive damage to the engine, with bent valves and even holed pistons resulting.
How to identify the teeth on a timing belt?
You should also look for identifying numbers and/or letters on the pulleys themselves to help in the timing belt tooth profile identification. Count the number of teeth on the timing belt. I suggest marking one tooth on the timing belt with some sort of identification so that you have a starting point for the tooth count.
If the valley between the teeth is flat than it is and PolyChain GT style timing belt. You should also look for identifying numbers and/or letters on the pulleys themselves to help in the timing belt tooth profile identification.
What kind of timing belts do McMaster Carr use?
Timing Belts | McMaster-Carr Choose from our selection of L series timing belts and pulleys, XL series timing belts and pulleys, high-strength timing belts and pulleys, and more. In stock and ready to ship. Contact Us
Can you replace timing belts with HTD belts?
Replace worn timing belts in 3D printers and other precision linear motion equipment with the exact belt length and teeth shape required. These high torque drive (HTD) belts come in a variety of lengths so you can cut the exact length you need.
Check and make sure that your timing belt is firmly and nicely seated to ensure maximum teeth to belt contact, and double check that your timing marks line up correctly. Have a friend come over to check your work, then check his work. Improper alignment of your timing belt can cause catastrophic engine failure.
Can you inspect the timing belt on a Honda Odyssey?
yes, timing belt can be inspected by taking off front timing belt cover. I think it requires serpentine belt to be removed though and maybe serpentine tensioner, but can be done. That said, I have replaced many of these belts and you can hardly tell the condition of one. You can try to spin the engine and look.
How to change a 4G63 timing belt guide?
The next step in our How To Change a 4G63 Timing Belt guide is to measure the distance your hydraulic tensioner is protruding from the top of the tensioner body to the actual tensioner arm. There should be a 3-8-4.5mm distance between the body of the tensioner and the bottom of the tensioner arm.
How do you change timing belt on water pump?
Undo the 12mm bolts that secure your water pump to your block, and slide it off the front water pipe. Use care not to tear or damage the water pipe o-ring, and use hi-temp gasket maker when you re-install your new water pump. All of our 4G63 Timing Belt kits come with a new gasket.
Downloadable/printable Timing Belt Tooth Profiles and Pitches (.pdf) Note the shape of the timing belt pulley teeth (tooth profile); if the valley between the teeth is curved than it is an HTD style timing belt. If the valley between the teeth is flat than it is and PolyChain GT style timing belt.
How often should I replace the timing belt on my Hyundai?
You should replace the timing belt on your Hyundai about every 60,000 miles. If you have a long commute or travel often in extreme weather, you may also have to replace its water pump at the same time. While that can be a costly repair package, preventative maintenance will save you thousands over time.
There should be two (2) measurements for this since the majority of timing belt drives has a means in place for tensioning the belts. The two distances required will have one of the shafts in the all the way forward position and the other in the all the way backward position. Count the number of teeth on both timing belt pulleys.
When to recheck the timing belt tensioning meter?
After the timing belt is properly tensioned, lock down the center distance adjustments and recheck the sprocket alignment. Recheck the timing belt tension and alignment after eight hours of operation to ensure the drive has not shifted. The sonic tension meter provides the most accurate tension measuring available.