Isuzu Impulse Accessory Drive Belt Replacement Guide (1983-1992)
Everything you need to know about choosing the right new aftermarket accessory drive belts for your 1983-1992 Isuzu Impulse.
- Your Impulse uses multiple V-belts, not a single serpentine belt; it is best to replace them all at once.
- Squealing noises and visible cracks are the clearest signs that your belts need to be replaced soon.
- Choose high-quality aftermarket brands like Bando, Mitsuboshi, Gates, or Continental for reliability.
- Verify your engine size and A/C option before ordering to ensure you get the correct belts.
Signs of a Bad Accessory Drive Belt
Accessory drive belts are made of rubber and wear out over time. For the 1983-1992 Isuzu Impulse, there are no specific recalls or factory bulletins for premature belt failure, so problems are typically due to normal aging. Ignoring the warning signs can leave you stranded. Watch for these common symptoms:
- Squealing Noises: This is the most common sign of a problem. A high-pitched squeal when you start the engine, accelerate, or make sharp turns usually means a belt is old, loose, and slipping on its pulleys.
- Visible Damage: Look at the belts. If you see cracks, frayed edges, missing rubber ribs, or a smooth, shiny surface, the belt is worn out and needs to be replaced immediately.
- System Failures: If your power steering suddenly becomes heavy, the A/C stops blowing cold air, or the battery warning light comes on, a belt has likely failed.
- Engine Overheating: On some engines, a drive belt also turns the water pump. If this belt breaks, the engine will overheat very quickly, which can cause serious damage.
Do Not Ignore a Squealing Belt
A squealing belt is a direct warning that it is failing. It might just be loose, but it could also be about to snap. A snapped belt can cause you to lose control of the car if the power steering fails, or it can cause the engine to overheat, leading to expensive repairs.
Choosing the Right Aftermarket Drive Belt
Since original Isuzu (OEM) belts for a vehicle of this age are often hard to find, the aftermarket is your best and most reliable source. The good news is that many aftermarket brands meet or exceed original quality. For a Japanese vehicle like the Isuzu Impulse, certain brands have a long history of being the original supplier.
Tier 1: OEM-Quality Brands
- Bando & Mitsuboshi: These two Japanese brands are very often the original equipment manufacturer for Isuzu and other Asian vehicles. Choosing a Bando or Mitsuboshi belt is as close to original quality as you can get, and they are known for excellent fit and long life.
Tier 2: Top-Tier Aftermarket Brands
- Gates, Continental, Dayco: These are all highly respected American and European brands that produce top-quality belts. You can be confident in the durability and performance of a belt from any of these manufacturers. Many professional mechanics trust and use them daily.
Common Ordering Mistake
The 1983-1992 Isuzu Impulse was available with several different engines (e.g., 1.9L, 2.0L, 2.3L) and with or without air conditioning. This means there are many different belt lengths. The most common mistake is ordering the wrong belt. Always confirm your engine size and whether your car has A/C before placing an order.
Accessory Drive Belt Replacement Cost
The cost to replace the accessory drive belts on your Impulse depends on whether you do it yourself or take it to a shop. Because the vehicle uses multiple belts, it is highly recommended to replace them all at the same time.
| Item | Estimated Cost |
|---|---|
| Aftermarket Belts (Set of 2-3) | $20 - $60 |
| Shop Labor | $100 - $225 |
| Total Estimated Cost (At a Shop) | $120 - $285 |
Cost estimates are for parts and labor and can vary based on your location and the specific shop's labor rates.
Frequently Asked Questions (FAQ)
Should I replace all the belts at once?
Yes. Your Impulse uses multiple V-belts. Since they are all exposed to the same conditions and are likely the same age, if one is worn out, the others are too. The labor required to access and replace one belt is almost the same as replacing all of them, so you save money and prevent future breakdowns by doing them all together.
Is replacing the drive belts a DIY job?
For a mechanically inclined person with basic hand tools, yes. The tension on these belts is typically adjusted manually, often by moving the alternator. The key is to make a simple drawing or take a photo of how the belts are routed before you take them off.
Should I replace the pulleys with the belts?
It's a good idea to inspect them. With the old belts off, spin each pulley by hand. They should spin smoothly and quietly. If a pulley feels rough, makes noise, or wobbles, it should be replaced. A bad pulley can destroy a new belt very quickly.
What does EPDM mean on a belt?
EPDM (Ethylene Propylene Diene Monomer) is a modern, high-quality synthetic rubber used in most new belts. It is much more resistant to heat, oil, and cracking than the older neoprene rubber belts. Belts made from EPDM last significantly longer.
Technical Specifications
OEM Part Numbers: 8942385680 8943795970 8943801590 94364580 94379597
System Type: Multiple V-Belts. Material: EPDM Rubber.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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