Chevrolet S10 Engine Timing Cover Guide for 1982-1987 Models
Leaking oil or coolant from the front of your engine? Your S10's timing cover could be the problem.
- For the 2.8L V6, a coolant leak near the water pump could be a cracked timing cover, which is a known issue.
- The price of the cover varies greatly between the 4-cylinder and V6 engines due to design differences.
- Properly sealing the new cover, especially where it meets the oil pan, is critical to prevent leaks.
- While the cover is off, it is a smart and cost-effective time to also replace the timing chain/gears and seals.
Is Your S10's Timing Cover Failing?
A bad timing cover can cause serious problems for your truck. Because these first-generation S10s are getting older, the original gaskets and seals are prone to failure. Knowing the symptoms can help you catch the problem before it leads to major engine damage.
Symptoms of a Bad Timing Cover
- Oil Leaks: This is the most common sign. You may notice oil dripping from the front-center of the engine or see oil residue around the crankshaft pulley. This is usually caused by a dried-out gasket or a worn front crankshaft seal.
- Coolant Leaks (2.8L V6 Only): If you have the V6 engine, a coolant leak from the front of the engine can be a sign of a cracked timing cover. This is a known issue and is often misdiagnosed as a bad water pump, 🎬 Watch: How to perform a visual inspection for coolant leaks as the pump bolts directly to the cover. Cracks can form from age or from over-tightening the water pump bolts.
- Engine Overheating: A significant coolant leak from a cracked cover will cause low coolant levels, leading your truck to overheat.
- Grinding or Slapping Noises: If the timing chain becomes loose, it can slap against the inside of the cover, creating noise and potentially damaging the cover itself.
Known Issue for 2.8L V6 Engines
Owners of the 2.8L V6 should be aware that the aluminum timing cover can develop hairline cracks, leading to persistent coolant leaks. If you have replaced your water pump and gasket but still have a leak in that area, the timing cover is the likely culprit. A loose timing chain can also hit the inside of the cover, causing a crack near a coolant passage.
Choosing the Right Aftermarket Timing Cover
With original GM parts being mostly unavailable, you will be choosing from aftermarket brands. The quality and price can vary significantly based on your engine. The cover for the 2.8L V6 is a complex cast aluminum part, while the cover for the 2.5L 4-cylinder is a simpler stamped component.
Aftermarket Brand Tiers
- Dorman: A widely available option for both V6 and 4-cylinder engines. Dorman parts are designed to be direct replacements. However, some user reviews for other vehicle applications have mentioned fitment issues where the cover meets the oil pan, which can cause leaks if not installed carefully.
- Pioneer Automotive Industries: Another common brand offering covers for the S10. Their products are designed to meet or exceed original specifications. Some general reviews note that the finish may be rougher than the original part and may require cleaning off casting flash before installation.
Pro Tip: Prepare for a Full Job
Replacing the timing cover is a good time to perform other maintenance. It is highly recommended to replace the timing cover gasket, front crankshaft seal, and water pump gaskets (on the 2.8L V6) at the same time. Consider replacing the timing chain and gears if they show signs of wear.
Cost of Replacing a 1982-1987 Chevrolet S10 Timing Cover
The cost to replace the timing cover depends heavily on your engine type and whether you do the work yourself or hire a professional.
🎬 Watch: How to replace the cover without removing the engine| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Part | $35 - $244 |
| Shop Labor | $250 - $500 |
| Total Professional Replacement | $285 - $744 |
Cost estimates are for reference only and will vary by location, vehicle condition, and the specific parts chosen.
Frequently Asked Questions
Do I need to replace my timing chain with the cover?
It is not required, but it is highly recommended. The timing chain or gears are completely accessible once the cover is off. Given the age of the vehicle, replacing these wear items as a preventative measure is a smart move.
🎬 See this walkthrough for replacing the Iron Duke timing gearsCan I reuse my old timing cover bolts?
Yes, you can typically reuse the original bolts if they are in good condition. Clean the threads thoroughly before reinstalling them. Some new timing cover kits may come with new hardware.
Why is the timing cover for the V6 so much more expensive?
The timing cover for the 2.8L V6 is a larger, more complex part made of cast aluminum that includes integrated coolant passages and serves as the mounting surface for the water pump. The cover for the 2.5L 4-cylinder is a much simpler stamped steel or plastic part that only serves to protect the timing gears.
Is a timing cover leak serious?
Yes, it can be. A small oil leak can be managed by checking your oil level frequently, but it won't fix itself. A major oil leak can lead to engine damage. On a 2.8L V6, a coolant leak from the timing cover is very serious and can cause rapid overheating, which can lead to catastrophic engine failure.
Helpful Videos
Technical Specifications
OEM Part Numbers: 10037435 14088523 14038900
Material varies by engine. The 2.8L V6 uses a cast aluminum cover which incorporates coolant passages. The 2.5L 4-cylinder uses a stamped steel or plastic cover.
We Have This Part in Stock
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.
- Chevrolet S10:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your S10's Timing Cover Failing?
- Symptoms of a Bad Timing Cover
- Known Issue for 2.8L V6 Engines
- Choosing the Right Aftermarket Timing Cover
- Aftermarket Brand Tiers
- Pro Tip: Prepare for a Full Job
- Cost of Replacing a 1982-1987 Chevrolet S10 Timing Cover
- Frequently Asked Questions
- 🎟️ Get 5% Off