2016 Smart Fortwo Timing Cover: Leaks, Integrated Oil Pump & Replacement Guide
This guide covers the common failure points of the 2016 Smart Fortwo timing cover, including the critical integrated oil pump and inspection tips for used parts.
- The timing cover for the 2016 Smart Fortwo critically integrates the engine's oil pump; a failure can starve the engine of oil and cause catastrophic damage.
- The most common symptom of a failing cover is an oil leak from the front of the engine.
- If the low oil pressure warning light comes on, stop the engine immediately to prevent total engine failure.
- Replacement is a complex, high-labor job (4/5 difficulty) due to the rear-engine layout, making a thorough inspection of a used part essential to avoid repeat repairs.
Common Symptoms of a Failing 2016 Smart Fortwo Timing Cover
Because the timing cover is central to both engine timing protection and lubrication, a failure can present several symptoms, some of which are extremely serious.
1. Oil Leaks from the Front of the Engine
This is the most common sign of a problem. The gasket sealing the timing cover to the engine block can become brittle over time, or the cover itself can develop a crack, leading to an oil leak. You may notice oil residue on the front of the engine, or drips on the ground under the front-center of the car. A burning oil smell is also possible if the leaking oil drips onto hot exhaust components.
2. Low Oil Pressure Warning Light
This is a critical symptom that demands immediate attention. Since the oil pump is integrated into the timing cover, a significant leak or a failure within the pump itself will cause a drop in oil pressure. If the oil pressure light illuminates on your dashboard, you should stop the engine immediately to prevent catastrophic damage.
3. Engine Misfires or Rough Running
In rare cases, if the timing cover is severely damaged or loose, it could allow debris to enter the timing components or affect the sensors that read the crankshaft and camshaft positions. A Reddit user with a 2016 Fortwo reported misfire codes along with camshaft/crankshaft errors, which their mechanic suspected could be related to the timing chain. While this could point to a stretched chain, any issue affecting the front of the engine where these components are located warrants a thorough inspection.
Warning: Do not continue to drive a vehicle with a low oil pressure light or a major oil leak. The 2016 Smart Fortwo's engine relies on the oil pump within the timing cover for lubrication. Continuing to run the engine without proper oil pressure will lead to rapid and irreversible engine failure.
Buying a Used 2016 Smart Fortwo Timing Cover: What to Check
Given the high cost of a new OEM part, a quality used timing cover is a viable option. However, due to its integrated oil pump, careful inspection is paramount.
Key Inspection Points:
- Check for Cracks and Damage: Meticulously inspect the entire cover, especially around the bolt holes and the outer edges, for any cracks or impact damage. Even a small crack can prevent a proper seal.
- Verify Flatness: Lay the cover on a known flat surface to check for warping. A warped cover will never seal correctly, leading to persistent leaks.
- Inspect the Oil Pump Housing: Look inside the cavity where the oil pump gears reside. Check for any deep scoring, gouges, or signs of debris that would indicate a previous oil pump failure. Since you cannot test the pump itself, sourcing a part from a low-mileage, running vehicle with a known history is the safest bet.
- Front Crankshaft Seal Area: Examine the bore where the front crankshaft seal sits. Ensure it is smooth and free of deep scratches or grooves that could damage a new seal and cause a leak.
Pro Tip: Always install a new front crankshaft seal into a used timing cover before installation. This is an inexpensive part that is crucial for preventing future leaks, and it's much easier to replace while the cover is off the engine.
Compatibility and Part Numbers
The 2016 Smart Fortwo uses an engine co-developed with Renault, which is why you will see part numbers from both Mercedes-Benz and Renault. It is essential to verify your engine size (0.9L Turbo or 1.0L Naturally Aspirated) before purchasing. Match the part number from your original cover to the replacement. Known OEM part numbers include:
- Mercedes-Benz: 2810101900, A2810101900
- Renault: 135023076R, 135028901R
Known Issues, TSBs, and Recalls
As of mid-2024, there are no specific recalls or Technical Service Bulletins (TSBs) from the National Highway Traffic Safety Administration (NHTSA) that directly address the timing cover or integrated oil pump for the 2016 Smart Fortwo. Recalls for this model year primarily concern the parking brake and headlight adjustments.
However, the Renault 0.9L TCe engine (H4Bt), which is used in the Fortwo, is known to have some issues with thermostat housing leaks and potential timing chain stretch at higher mileage, which can cause rattling noises. 🎬 Watch this video review on 0.9 TCe timing and reliability issues. While not a direct failure of the cover itself, these issues occur in the same area of the engine.
Cost & Replacement Information
Replacing the timing cover on a 2016 Smart Fortwo is a labor-intensive job. The rear-engine, rear-wheel-drive layout requires significant disassembly to access the front of the engine. The process often involves removing belts, the crankshaft pulley, and other accessories.
| Part/Service | Estimated Cost |
|---|---|
| New OEM Timing Cover | $400 - $600+ |
| New Aftermarket Timing Cover | $150 - $300 |
| Used OEM Timing Cover | $75 - $200 |
| Shop Labor Cost | $800 - $1,500+ |
Frequently Asked Questions (FAQ)
Is the oil pump really inside the timing cover?
Yes. The 2016 Smart Fortwo's engine, the Renault H4Bt, features a variable displacement oil pump that is integrated directly into the timing cover assembly. This design is compact but makes the timing cover a critical component for engine lubrication.
Can I just replace the timing cover gasket instead of the whole cover?
Yes, if the leak is only due to a failed gasket and the cover itself is not cracked or warped, you can just replace the gasket. However, the labor involved is identical to replacing the entire cover, so it is crucial to inspect the cover thoroughly once it's removed to avoid having to do the job twice.
Is this a difficult job to do myself?
Yes, this is an advanced repair. It requires draining fluids, removing the serpentine belt, crankshaft pulley (which may require a special tool), and accessing the rear-mounted engine. For most DIY mechanics, this job is best left to a professional. We rate it a 4 out of 5 on the difficulty scale.
Do I need to replace the timing chain at the same time?
While the timing chain is considered a 'lifetime' part, it's a good opportunity for inspection. If the vehicle has high mileage or if you've heard any rattling noises from the engine, it is wise to replace the timing chain, tensioner, and guides while the cover is off, as all the labor to access them has already been done.
Helpful Videos
Technical Specifications
OEM Part Numbers: 2810101900 A2810101900 135023076R 135028901R
Material: Cast Aluminum. Integrated component: Variable displacement oil pump.
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.
- Smart Fortwo:
- 🎬 Helpful Videos
- Common Symptoms of a Failing 2016 Smart Fortwo Timing Cover
- 1. Oil Leaks from the Front of the Engine
- 2. Low Oil Pressure Warning Light
- 3. Engine Misfires or Rough Running
- Buying a Used 2016 Smart Fortwo Timing Cover: What to Check
- Key Inspection Points:
- Compatibility and Part Numbers
- Known Issues, TSBs, and Recalls
- Cost & Replacement Information
- Frequently Asked Questions (FAQ)
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