ACDelco Engine Timing Belt

ACDelco stands for quality. Get the performance you need with ACDelco products. ACDelco timing belts are high quality aftermarket parts that are OE-equivalent, or better, in service life and performance. These timing belts are manufactured using the same high grade material and processes as the original equipment. ACDelco products are developed to exceed your performance expectations and deliver the durability you expect.


• Aramid reinforced nylon jackets and back side jackets for longer wear
• High grade Hydrogenated Nitrile Butadiene Rubber (HNBR) for superior heat and contamination resistance
• ACDelco does not substitute inferior belt construction for premium constructions
• Premium high strength tensile members


• Rubber Loss: (most common belt wear) a belt wear gauge measures rubber loss, which can result in reduced power transfer from the crank to the accessories.
• Polished side of the ribs: shiny spots can indicate a slipping belt that isn’t properly transferring power to accessories.
• Pilling: worn rubber can fill in grooves and cause noise, heat, vibration, and excessive wear.
• Abrasion: wear along the side could indicate pulley misalignment or a failed tensioner.
• Cracking: neoprene belts crack as they near the end of their life cycle and often need to be replaced.
• Engine stops or backfires.
• The belt is producing a squealing noise.


• Do not use belt dressings to stop belt slippage or noise. These are oil based and may cause belt deterioration.
• Do not crimp a belt during inspection. This may damage the tensile cords and cause premature failure.
• Replace Timing Belts every 60,000 km for Hydrogenated Nitrile Butadiene Rubber (HNBR) and every 30,000 km for Polychloroprene Rubber (CR).
• Use an approved tension gauge to check belt tension.


Q: Could an automotive belt tear during use?
A: Yes. This may be indicative of an alignment issue or a failed tensioner.

Q: Will I know immediately if an automotive belt tears?
A: Yes. You may lose your power steering or stall out. Your car is not drivable when your drive belt fails.

Q: Are there steps I can take to ensure a longer automotive belt life?
A: Yes. The leading causes of belt failure are improper tension and misaligned pulleys. Both these conditions cause excessive heat which leads to belt failure. Have your belts checked every 30,000 km for belt wear, proper tension, and pulley alignment.

Q: Is there a way to repair a torn automotive belt?
A: No. When the belt backing has been torn or cracked, the belt should be replaced.

Q: Can I use the same automotive belt for multiple uses?
A: No. Use the belt in the way it’s listed in the ACDelco belts catalog.

Q: Will a worn automotive belt affect gas mileage?
A: No. Remember the leading cause of belt failure is improper tension and misaligned pulleys. Improper tension will cause the belt to slip.