MERCEDES Cylinder Head Bolt Washers 306-58196R Benz

( Manufacturer Part Number: 560SL ), ( Conditions Options: Cylinder Head Bolt Washers Only Qt 2 ), ( Genuine Oem: Yes ), ( Ipn: 306-58196r ), ( Placement: Passenger/right ), ( Make: Mercedes-benz ), ( Vintage Part: No ), ( Manufacturer Warranty: 60 Day ), ( Type: Cylinder Head )

Review MERCEDES benz Cylinder Head Bolt Washers fits 560SL 560SEC 560SEL 1986–1991

The **Mercedes-Benz 306-58196R cylinder head bolts washers** are precision-engineered, high-quality components specifically designed for the **M116 3.0-liter inline-six engine** found in the **1986 1991 560 SEC, 560 SEL, and 560 SL** models. These washers are crafted from **high-grade steel**, ensuring durability and resistance to corrosion, which is critical for maintaining proper sealing and torque retention in the cylinder head assembly. Their **flat, smooth surface** and **accurate dimensions** guarantee a secure and consistent fit under the cylinder head bolts, preventing leaks and ensuring optimal compression within the combustion chambers. Engineered to meet Mercedes-Benz s strict engineering standards, these washers are essential for preserving the integrity of the engine s sealing surfaces, particularly in high-performance applications where thermal expansion and mechanical stress are factors. Whether used during routine maintenance, engine rebuilds, or performance upgrades, these **OEM-specification washers** provide the reliability and precision required to keep the **560-series** engines running at peak efficiency for years to come. Their compatibility with the **M116 engine s cylinder head design** ensures a perfect match, making them a must-have replacement part for any restoration or service project involving this iconic Mercedes-Benz powertrain.

### Pros and Cons of Buying Mercedes-Benz 306-58196 Cylinder Head Bolt Washers (1986-1991 560SEC/560SEL/560SL)

1. **Authentic Fitment** These washers are designed specifically for the 1986-1991 Mercedes-Benz 560 models (SEC, SEL, SL), ensuring compatibility with the engine s cylinder head bolt assembly. Using OEM parts reduces the risk of improper fitment or performance issues.

2. **Prevents Leaks and Damage** Cylinder head bolt washers act as a barrier between the bolts and the head, preventing corrosion, galling, and potential leaks. Over time, these washers can degrade, so replacing them during maintenance or repairs helps maintain engine integrity.

3. **Maintains Compression and Performance** A properly sealed cylinder head ensures optimal compression and prevents excessive heat buildup, which is critical for the longevity and efficiency of the engine.

4. **Prevents Bolt Stripping** The washers help distribute torque evenly across the bolt threads, reducing the risk of stripping or shearing, which can lead to catastrophic engine failure.

5. **Easy to Install** These washers are simple to install and do not require specialized tools beyond a socket wrench. They are typically sold in bulk, making them cost-effective for routine maintenance.

6. **Available from Trusted Sources** Reputable suppliers (such as OEM dealers, eBay, or specialty auto parts stores) often provide genuine or high-quality aftermarket washers with warranties, ensuring reliability.

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1. **Limited Availability** Finding genuine OEM washers (306-58196) may be challenging, especially if purchasing from non-standard sources. Some sellers may offer counterfeit or low-quality alternatives, which could fail prematurely.

2. **Potential for Counterfeit Parts** Due to the rarity of these washers, there is a risk of receiving fake or substandard replacements. Always verify the seller s reputation and check for authenticity markings (e.g., Mercedes-Benz logos, part numbers).

3. **Cost** While individual washers are inexpensive, buying a full set (especially if multiple bolts require replacement) can add up. If the washers are part of a larger repair (e.g., cylinder head overhaul), the cost may be justified, but standalone purchases might seem unnecessary unless symptoms (leaks, misfires) are present.

4. **Not Always Necessary for Routine Maintenance** Unless you re performing a full cylinder head service or replacing bolts, these washers may not need replacement during standard oil changes or minor repairs. Over-replacing them could lead to unnecessary expenses.

5. **Mixed Quality in Aftermarket Options** While some aftermarket washers are high-quality and compatible, others may be made from inferior materials (e.g., soft metals that deform easily). This could compromise sealing effectiveness over time.

6. **Time-Consuming to Source** Tracking down the exact part number (306-58196) for older Mercedes models can be time-consuming, especially if you re not familiar with the vehicle s service parts system.

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Buying Mercedes-Benz 306-58196 cylinder head bolt washers is a **recommended practice** if you are performing a cylinder head service, replacing bolts, or addressing symptoms like oil leaks, compression loss, or unusual engine noises. The washers are critical for maintaining engine sealing and preventing long-term damage. However, if you re unsure whether replacement is necessary, consult a mechanic or Mercedes-Benz service manual to confirm.

- Purchase from a **trusted source** (e.g., OEM dealer, reputable online retailer, or a Mercedes-Benz specialist).

- Verify the **part number and authenticity** before buying to avoid counterfeit washers.

- Consider buying a **full set** if multiple bolts are being serviced, as this ensures consistency.

- If unsure about the need for replacement, prioritize other maintenance tasks (e.g., valve adjustment, gasket replacement) that may be more critical for your specific engine condition.

If you re conducting a **cylinder head rebuild, bolt replacement, or addressing head gasket-related issues**, replacing the washers is a **worthwhile investment** to ensure proper sealing and engine longevity. For routine maintenance without clear symptoms, they may not be urgent but if you re already working on the head, replacing them is a good preventive measure. Always cross-reference with your vehicle s service history and consult a professional if in doubt.

Details:

Cylinder Head Bolt Washers Fits 1986 1991 Mercedes Benz 560SEC 560SEL 560SL ITEM: - qty of 2 ITEM condition: Good, used condition. For items sold with Free Shipping or Flat Rate Shipping, the free shipping flat rate only applies when item is shipped to a address within continental USA. The only exception would be if the engine/transmission is a CORE unit and being sold for parts. CYLINDER HEAD BOLT WASHERS ONLY QT 2 B167B1.

Engines and Transmissions have a 90 day parts only warranty.

specifications cylinderheapar:

• for models: 560sl, 560sec, 560sel
• for makes: Mercedes
• for years: 1986-1991
• mpn: 560sl
• conditions options: Cylinder Head Bolt Washers Only Qt 2
• genuine oem: Yes
• ipn: 306-58196r
• placement: Passenger/right
• make: Mercedes-benz
• vintage part: No
• manufacturer warranty: 60 Day
• type: Cylinder Head

offer cylinderheapar:

• sold: 0
• options: Ship-to-home
• best offers: True
• started: April 24, 2026
• availability: In Stock
• quantity: 1

general cylinderheapar:

• Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads
• condition: Used

returns cylinderheapar:

• policy: Returns Accepted
• time: 30 Days
• paid by: Seller

seller cylinderheapar:

• # reviews: 15430
• city: Athens, Tennessee
• rating: 99.4%

shipping cylinderheapar:

• transit: 4-8 Days
• service: Standard, Expedited, Overnight
• cost: $0.00
• type: Fixed
• class: Standard, Expedited, One-day

payments cylinderheapar:

• other
• credit card: Diners-club
• wallet: Google-pay

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