1. Engine Crankshafts Products
  2. sku: 19953624926468793
  3. AC DELCO 42699BPKT

AC DELCO 42699BPKT Crankshaft Seal Rear

fits model: K5, Blazer. make: Chevrolet. year: 1982–1985.

42699bpkt Ac Delco For 1982-1985 Chevrolet K5 Blazer Crankshaft Seal Rear 1983

( Brand: Ac Delco ), ( Manufacturer Part Number: 42699BPKT ), ( Part Type: Seal Crankshaft ), ( Placement On Vehicle: Rear ), ( Manufacturer Warranty: 12 Month Warranty ), ( Notes: Engine Crankshaft Seal New ), ( Years: 1982 1983 1984 1985 ), ( Application: Chevrolet K5 Blazer Crankshaft Seal ), ( Product Name 2: Engine Crankshaft Seal ), ( Cs-sku: 400 )

Review AC DELCO Chevrolet Crankshaft Seal Rear fits BLAZER K5 1982–1985

The **AC Delco 42699BPKT** is a high-performance, precision-engineered crankshaft seal designed specifically for the rear main bearing housing of the **1982 1985 Chevrolet K5 Blazer**, particularly tailored to the **1983 model year** with its **305 cubic inch (5.0L) V8 engine** a robust and reliable powerplant known for its durability in both on-road and off-road applications. This seal is crafted from **high-quality nitrile rubber**, reinforced with a **steel spring retainer and a robust metal backing plate**, ensuring optimal sealing performance while withstanding the intense pressures and temperatures generated by high-performance engines. The **BPKT designation** indicates it is a **butyl-backed, pre-lubricated kit**, which simplifies installation by eliminating the need for additional sealant or grease, reducing the risk of leaks and contamination during fitment. Engineered to fit snugly within the **rear crankshaft housing**, this seal provides a tight, leak-proof barrier against oil and coolant, preventing costly internal damage and maintaining engine longevity. Whether you're tackling rugged terrain, towing heavy loads, or simply maintaining your Blazer s performance, this seal delivers the reliability and durability required to keep your engine running smoothly for thousands of miles. Its compatibility with the **Chevrolet K5 Blazer s drivetrain** ensures a perfect fit, while its robust construction minimizes wear and tear, making it an essential upgrade for any vehicle owner seeking to preserve their engine s integrity.

The **AC Delco 42699BPKT** is a rear crankshaft seal designed for the 1982 1985 Chevrolet K5 Blazer (1983 model specifically mentioned). Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the AC Delco 42699BPKT Crankshaft Seal**

1. **OEM Quality and Compatibility**

AC Delco is a well-known aftermarket brand that produces parts designed to meet or exceed original equipment manufacturer (OEM) specifications. This seal is engineered to fit the 1982 1985 K5 Blazer s rear main housing, ensuring proper alignment and sealing. The part number (42699BPKT) is widely recognized for this application, reducing the risk of fitment issues.

2. **Durability and Performance**

AC Delco seals are typically made from high-quality materials, such as nitrile rubber or other synthetic compounds, which provide better resistance to oil, heat, and wear compared to generic or low-quality replacements. This can extend the life of the seal and reduce the likelihood of premature failure, especially in vehicles with higher mileage or those used for towing or heavy loads.

3. **Ease of Installation**

The seal is designed with a straightforward installation process. It comes pre-lubricated or with clear instructions, which can make the job easier for DIYers. The rubber lip is often designed to seat properly into the housing without excessive force, reducing the risk of damage during installation.

4. **Widespread Availability**

AC Delco parts are readily available through auto parts stores (both physical and online), dealerships, and online retailers. This makes it easier to purchase the seal quickly, especially if you need it as a replacement for a leaking or failed seal.

5. **Warranty and Reliability**

AC Delco offers warranties on many of its parts, providing some assurance against defects. While warranties vary by retailer, the brand s reputation for reliability means you re less likely to encounter issues with the seal itself compared to no-name or budget alternatives.

6. **Compatibility with Aftermarket Upgrades**

If you ve modified your vehicle (e.g., upgraded the rear differential, added a sump guard, or modified the housing), an AC Delco seal is likely to be compatible with these changes, as it adheres to the original design standards.

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### **Cons of the AC Delco 42699BPKT Crankshaft Seal**

1. **Cost Relative to Generic Alternatives**

AC Delco seals are generally more expensive than no-name or store-brand replacements. For a single seal, the price may range from $20 to $50, depending on the retailer. While this is a reasonable investment for an OEM-quality part, budget-conscious buyers might opt for cheaper alternatives, though with potential trade-offs in durability.

2. **Potential for Overkill in Some Cases**

If your vehicle has minimal mileage or hasn t experienced significant wear, a high-quality seal like this might be more than necessary. In such cases, a slightly cheaper but still reputable seal (e.g., from a brand like **Fel-Pro** or **Mobil 1**) could suffice without sacrificing performance.

3. **Installation Challenges for Inexperienced DIYers**

While the seal itself is designed for ease of installation, the process of removing the old seal, cleaning the housing, and ensuring proper lubrication can be tricky for those without mechanical experience. Improper installation (e.g., not cleaning the housing thoroughly or not lubricating the seal properly) can lead to premature failure or leaks.

4. **Limited Customization**

The seal is a standard part and does not offer customization options (e.g., different materials or sizes). If you need a seal with specific properties (e.g., for extreme temperatures or high-pressure applications), you may need to look for specialized brands or custom solutions.

5. **Potential for Counterfeit Parts**

As with many aftermarket parts, there is a risk of purchasing counterfeit AC Delco seals, especially from untrusted online sellers. Counterfeit parts may fail quickly or not fit properly, leading to additional repair costs. Always buy from reputable retailers (e.g., **RockAuto, Amazon, local auto parts stores**) to avoid this issue.

6. **Environmental and Disposal Considerations**

Like all rubber seals, the AC Delco part is not biodegradable and may require proper disposal. If you re environmentally conscious, you may need to take extra steps to recycle or dispose of it responsibly, though this is a minor consideration compared to the functional aspects of the part.

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### **Conclusion**

The **AC Delco 42699BPKT crankshaft seal** is a strong choice for replacing the rear main seal in a 1982 1985 Chevrolet K5 Blazer. Its OEM-quality design, durability, and widespread availability make it a reliable option for both DIYers and professionals. While it is more expensive than generic alternatives, the long-term performance and reduced risk of leaks or premature failure justify the cost, especially for vehicles with higher mileage or those used for towing.

The main drawbacks higher cost and potential installation challenges are outweighed by the seal s benefits, particularly if you prioritize quality and longevity. For most owners, the AC Delco seal is the best balance between performance and reliability.

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### **Recommendation**

**Buy the AC Delco 42699BPKT seal** if:

- You want a high-quality, long-lasting replacement that matches OEM specifications.

- You re willing to invest in a part that reduces the risk of future leaks or differential damage.

- You plan to perform the installation yourself and are comfortable with basic mechanical work (or are prepared to pay for professional installation).

- You re purchasing from a trusted retailer to avoid counterfeit parts.

**Consider alternatives (e.g., Fel-Pro, Mobil 1, or a reputable no-name brand) if:**

- Your vehicle has very low mileage and you re on a tight budget.

- You re unsure about your ability to install the seal properly and prefer a slightly cheaper option with similar quality.

- You re open to exploring other brands that offer warranties or comparable performance at a lower cost.

**Additional Tips:**

- Always clean the rear main housing thoroughly before installing the new seal to remove old gasket material, debris, or oil residue.

- Use a high-quality sealant (e.g., **Permatex 24000**) to ensure a proper seal between the housing and the new seal.

- If you re unsure about installation, consult a mechanic or watch detailed step-by-step videos for your specific vehicle model.

- Check for leaks after the first few miles of driving and re-torque the housing bolts if necessary.

Details:

Position: Rear. Notes: Engine Crankshaft Seal New.

part #: 42699bpkt price

  • $24.50

specifications cranshafengin:

  • for models: K5, Blazer
  • for makes: Chevrolet
  • for years: 1982-1985
  • brand: Ac Delco
  • mpn: 42699bpkt
  • part type: Seal Crankshaft
  • placement on vehicle: Rear
  • manufacturer warranty: 12 Month Warranty
  • notes: Engine Crankshaft Seal New
  • years: 1982 1983 1984 1985
  • application: Chevrolet K5 Blazer Crankshaft Seal
  • product name 2: Engine Crankshaft Seal
  • cs-sku: 400

general cranshafengin:

  • Car Truck Parts Accessories > Engines Engine Parts > Crankshafts
  • condition: New

payments cranshafengin:

  • other
  • wallet: Apple-pay
  • credit card: Mastercard

returns cranshafengin:

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

offer cranshafengin:

  • sold: 0
  • quantity: 1
  • options: Ship-to-home
  • started: April 21, 2026
  • availability: In Stock

shipping cranshafengin:

  • class: Standard
  • carrier: FedEx
  • service: FedEx Ground / FedEx Home Delivery
  • cost: $0.00
  • transit: 3-7 Days
  • type: Fixed

seller cranshafengin:

  • rating: 98.8%
  • city: Tempe, Arizona
  • # reviews: 329473
for models: k5, blazer, for makes: chevrolet, for years: 1982-1985, part type: seal crankshaft, placement on vehicle: rear, manufacturer warranty: 12 month warranty, notes: engine crankshaft seal new, years: 1982 1983 1984 1985, application: chevrolet k5 blazer crankshaft seal, product name 2: engine crankshaft seal, cs-sku: 400,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, sku: 19953624926468793,
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