-
Welcome to Auto Parts Forum
Whether you are a veteran automotive parts guru or just someone looking for some quick auto parts advice, register today and start a new topic in our forum. Registration is free and you can even sign up with social network platforms such as Facebook, X, and LinkedIn.
Timing Belts vs. Timing Chains
-
Similar Topics
-
By Counterman
The
link hidden, please login to view — which tracks demand conditions, shortages, transportation costs, inventories and backlogs based on a monthly survey of 27,000 businesses — rose in April to -0.18, from -0.32 in March, which signals that global supply chains are operating at close to full capacity. An Index greater than 0 indicates supply chain capacity is being stretched. The further above 0, the more stretched the supply chains are. An index less than 0 indicates supply chain capacity is being underutilized. The further below 0, the more underutilized supply chains are.
Improving activity across global supply chains is a direct result of healthier demand, which has picked up consistently in the year-to-date after considerable weakness in 2023, GEP said. The Asian market is at the forefront of this trend, with input demand at the region’s factories remaining strong. Procurement managers in South Korea, Vietnam, India and China reported greater purchasing activity during April.
According to GEP Consulting, the North American market is showing more evidence of tightening capacity, with backlogged work reported by manufacturers, particularly in Mexico. Demand for raw materials, commodities and components, while still subdued, also improved slightly. Meanwhile, demand conditions were less robust in Europe, with the region’s manufacturing sector continuing to underperform and lag other parts of the globe. Positively, however, the industrial recession across the continent has eased considerably since late last year.
“After four years of supply shocks, inflation, stockpiling, and uncertainty, global supply chains are now operating in a Goldilocks zone, a steady state of full capacity, not expanding or contracting too quickly, which is excellent news for global suppliers and business,” Mike Seitz, vice president, GEP Consulting said. “In China, we’re seeing a steady pick-up in manufacturing activity, which will encourage Chinese Premier Li Qiang to accelerate efforts to remove barriers imposed by European markets and foster more FDI, especially as the potential for tougher U.S. tariffs and trade policies loom.“
April 2024 key findings
Demand: Global demand for raw materials, commodities and components remained close to its long-term average in April, highlighting vastly improved conditions in the worldwide manufacturing sector compared with late last year. As was also the case in March, Asia was the main positive force, with major goods-producing nations such as China, India and South Korea recording growth, according to GEP. Inventories: Inventory drawdowns persisted into April, albeit cooling in strength compared to March. Reports from global businesses of stockpiles rising because of price or supply concerns were among the lowest seen in over four years, GEP said. Material shortages: GEP said reports of a short supply for items, including semiconductors, foodstuff, chemicals, and metals, remain historically low. Labor shortages: After rising for the past three months, GEP said global reports of backlogged orders rising because of staff shortages fell in April and were broadly aligned with historically typical levels. Regional differences persisted, however, with North America seeing greater labor shortages than elsewhere. Transportation: Following recent increases in oil prices, global transportation costs rose for the first time this year in April, according to GEP. Regional supply chain volatility
North America: Index broadly unchanged at -0.30, versus -0.31 previously. Although indicative of spare capacity, the input demand trend ticked higher in April, while increased backlogs of work were also reported, GEP said. Europe: Index fell to -0.55, from -0.62. GEP said April’s increase suggests the continent’s industrial downturn continued to ease. U.K.: Index decreased to -0.47, from -0.17 as U.K. manufacturers destock sharply instead of ordering from suppliers, GEP said. Asia: The Index rose to 0.07, from -0.07, signaling the first month of stretched supplier capacity since January, according to GEP. The post
link hidden, please login to view appeared first on link hidden, please login to view.
link hidden, please login to view -
By Counterman
You might not be able to see it, but an accessory-drive belt is always both speeding up and slowing down. When a piston accelerates downward after the ignition of the fuel and air, the crankshaft speeds up and then slows down as it reaches the bottom of the stroke. These changes in speed are minimal, but big enough to cause problems over time.
If the pulses aren’t minimized, they can hammer the belt and the attached rotating components. On a four-cylinder engine, the degrees of rotation between power pulses are greater than on a V-8 – so the amount of change in speed on the four-cylinder pulley is greater than on a V-6 or V-8. This has a direct effect on how the belt system is designed.
The belt-drive system is working hardest when the engine is at idle. When the engine is below 1,000 rpm, the alternator, A/C compressor and power-steering pump are putting the greatest strain on the belt.
Some of the forces can be taken up by the belt slipping on the pulleys. But, slipping causes friction and wear on the belt, as well as flutter. Over time, the slipping can get worse as removal of material from the ribs causes the belt to bottom out.
There are three components that help to keep the belt on the pulleys without slipping. The tensioner, harmonic balancer and decoupler pulley work together to keep the accessory-belt system quiet and the belt lasting until the replacement interval.
Tensioner
The tensioner applies force on the belt. Some tensioners have devices that dampen the movement of the spring and arm, helping to keep constant force on the belt even under a wide variety of conditions.
Harmonic Balancer
The harmonic dampener puts a layer of soft material between the crankshaft and outer ring of the pulley. The material helps to dissipate the power pulses and resonant frequencies. While the dampener may only flex one or two degrees of movement, this takes a lot of strain off attached components.
Decoupler Pulley
Some alternators have a decoupler pulley. This device serves two purposes. First, it helps to decouple the pulley from the alternator with a one-way clutch. The decoupler reduces parasitic losses by not having to fight against the momentum of the armature in the alternator while the engine is decelerating and accelerating.
Some decoupler pulleys have a spring and friction dampener to reduce vibration. When an alternator decoupler pulley is compromised, it can no longer absorb the same level of abuse, which has a trickle-down effect throughout the system.
Alternator decouplers and pulleys should be inspected every 10,000 miles for wear. Early design versions have a service life of 40,000 to 60,000 miles, with more recent versions lasting more than 100,000 miles.
When inspecting a decoupler or pulley, there are two signs that replacement is needed. First, after shutting down the engine, if there’s an audible buzzing, the bearings in the pulley have likely failed. The second sign depends on whether the vehicle has a one-way clutch (OWC), overrunning alternator pulley (OAP) or decoupler (OAD).
With the inspection cap/cover removed and the center locked, turn the pulley or decoupler with the appropriate tool. If it’s an OAP or OWC, the pulley can only be turned in the clockwise direction. If it’s an OAD, a counterclockwise turn will reveal a noticeable increase in spring force; a clockwise turn will only have slight resistance. The tensioner, harmonic balancer and decoupler pulley work together to keep the belt in contact with grooves in the pulleys. The three components are engineered together to match the engine. If one part is compromised, all are compromised, including the belt.
The post
link hidden, please login to view appeared first on link hidden, please login to view.
link hidden, please login to view -
By jameswesley
National Truck Pro: National link hidden, please login to view Pro is a popular auto parts store chain with multiple locations in Los Angeles and Gardena. They offer a wide range of automotive parts, including batteries, brakes, filters, and fluids, making them a convenient choice for routine maintenance and repairs.
O'Reilly Auto Parts: O'Reilly Auto Parts is another established chain with stores throughout the region. They provide a comprehensive selection of auto parts and tools, along with knowledgeable staff to assist customers in finding the right components for their vehicles.
NAPA Auto Parts: NAPA Auto Parts is a trusted name in the automotive industry and has several locations in Los Angeles and Gardena. They offer quality parts, tools, and equipment for both professional mechanics and individuals working on their cars.
Pep Boys: Pep Boys has been serving the automotive community for decades and operates stores in the area. They provide a wide array of auto parts, accessories, and services, including tire and battery installations.
Advance Auto Parts: Advance Auto Parts has a presence in the Los Angeles area and offers a diverse range of auto parts, from engine components to lighting and electrical systems.
These jobber stores are invaluable resources for anyone looking to maintain, repair, or customize their vehicles. Whether you need essential components like brakes and filters or are seeking performance upgrades and accessories, these stores typically have a knowledgeable staff and a vast inventory to meet your auto parts needs. Be sure to check their specific locations, hours, and availability before planning your visit.
-
By NAPA
Tread Carefully! It’s a Slippery Slope
If you live in an icy climate, you know the danger that comes with venturing onto roads layered with snow and sleet. Any slippery surface like that requires superior traction to maintain a sense of control. Without proper handling of your vehicle, you’re raising the risk of an accident, getting stranded and ruining the underbelly of your vehicle. That’s why it’s always important to have a
link hidden, please login to view. No matter if you feel confident trekking snowy terrain, loss of tire traction can result from a lot of things, including worn tires, hurried acceleration and climbing steep hills that cause wheels to spin. Even in climates where it isn’t the norm, having the right gear to handle those one-off snow days is critical! That’s when tire snow chains come in handy. Rather than investing in costly
link hidden, please login to view for your vehicle, link hidden, please login to view are a budget-friendly solution that improves the grip your tires have on ice and snow. These are chain systems help dig into packed snow and icy surfaces with spiked grip, improving the traction of your vehicle so you aren’t prone to skidding. Not a One-Size-Fits-All Solution link hidden, please login to view
Before you get started, you’ll want to know the right kind and amount of snow tire chains needed for your specific vehicle. It’s also important to check the legal restrictions of tire chain use as some states don’t allow them. Clearance heights and material restrictions also apply to certain vehicles. If you need a refresher on your specific needs, check your owner’s manual for details.
Once you’ve read up on OEM requirements and sizing, the next step is to look for chains that fit your application. For example, if you’re dealing with more icy conditions than snow, you want to look for chains that feature spiked ends, studs or “icebreakers” that can properly grip the slick surface. There are also
link hidden, please login to view designed with large, square links that are a bit more rounded, giving you a smoother ride over packed snow. You should also know chains aren’t the only option out there, but they work well for moderately snowy climates. There are also
link hidden, please login to view, which are long pieces of metal cables wrapped in plastic that are ideal for occasional use. They’re typically cheaper, easier to install and allow for higher speeds, but they’re not as durable as chains. We outline the differences in link hidden, please login to view so can narrow down the options for a better lifestyle fit. Survive Snowpocalypse with NAPA
For most snow drivers, chains are the happy medium. However, installing chains and pulling them apart is a process you’ll have to familiarize yourself with before you can use them without damaging your vehicle or road. You’ll need to drive slower than usual and always make sure to pull over and remove the chains when not directly driving over packed snow or ice. Using snow chains over bare pavement or gravel can result in serious damage to your tires and the road itself. For a more in-depth look into how you should incorporate tire chains into your gear collection, check out
link hidden, please login to view Depending on your vehicle’s build and the amount of snow you’re dealing with on a regular basis, your best tool for combatting snow chaos might look different than that of your neighbor. What’s most important is that you stay prepared for the days when you can’t stay indoors and hide from the blistering cold weather. Using traction-enhancing devices to stabilize your vehicle is the key to calm, collected snow driving. Let the friendly NAPA folks help you choose the best tire chains for snow or ice by shopping our selection of
link hidden, please login to view. If you still aren’t sure of the right fit, stop by your link hidden, please login to view to get expert guidance on vehicle-specific parts, tools and more. Photo courtesy of
link hidden, please login to view The post
link hidden, please login to view appeared first on link hidden, please login to view.
link hidden, please login to view
-
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.