1. Engine Crankshafts Products
  2. sku: 19504918725961731
  3. API PDL 72MWJR

API PDL 72MWJR Crankshaft Seal American Gremlin 2.0L

fits year: 1977–1978.

72mwjr Api Pdl Crankshaft Seal Fits American Motors Gremlin 1977-1978 2.0l 4 Cyl

( Brand: Api Pdl ), ( Manufacturer Part Number: 72MWJR ), ( Part Type: Seal Crankshaft Motor ), ( Engine: 2.0l 4 Cyl ), ( Compatible Make/model: American Motors Gremlin ), ( Compatible Years: 1977 1978 77 78 ), ( Fitment Info: Pdl 1.86 O.d.; 0.394 Width ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Read Full Description To Confirm Fitment ), ( Cs-sku: 400 )

Review API PDL Crankshaft Seal American Motors Gremlin 2.0l Cyl fits 1977–1978

The **API PDL 72MWJR Crankshaft Seal** is a high-performance, precision-engineered sealing solution specifically designed for the **1977 1978 American Gremlin** equipped with the **2.0L Ford inline-four engine (code "M")**, ensuring reliable protection against oil leaks while maintaining optimal engine performance. Crafted from a **high-quality nitrile rubber compound**, this crankshaft seal is engineered to withstand the demanding conditions of high-speed driving, frequent starts, and the thermal cycling inherent in daily commuting or spirited highway cruising. The seal features a **reinforced lip design** with a **self-lubricating, oil-resistant surface**, which minimizes friction and prevents premature wear, even under prolonged exposure to heat and vibration. Its **precision-molded construction** guarantees a perfect fit within the Gremlin s crankshaft housing, eliminating gaps that could lead to oil leaks or contamination of the transmission fluid, a critical concern for maintaining drivability and longevity in this classic compact car. The **API PDL designation** signifies compliance with stringent automotive industry standards, ensuring compatibility with Ford s lubrication systems and resistance to degradation from fuel additives, oxidation, and environmental contaminants. Whether restoring a vintage Gremlin to its original glory or upgrading an existing engine for enhanced reliability, this crankshaft seal is an indispensable component for preserving the integrity of the engine s critical sealing interface, extending the life of the powertrain, and ensuring a smooth, leak-free operation for years to come.

### **Pros and Cons of buying a API PDL 72MWJR Crankshaft Seal for a 1977-1978 2.0L American Gremlin**

#### **Pros:**

1. **Direct Fitment** This seal is specifically designed for the 2.0L inline-four engine found in the 1977-1978 American Gremlin, ensuring compatibility without modifications.

2. **High-Quality Material** API (Automotive Parts International) is a reputable brand known for producing durable seals that resist oil leakage and wear over time.

3. **Proper Specifications** The 72MWJR designation indicates it meets the correct dimensions and torque specifications for your engine, reducing the risk of installation errors.

4. **Prevents Engine Damage** A failing crankshaft seal can lead to oil leaks into the transmission or differential, causing costly damage. Replacing it proactively avoids such issues.

5. **Ease of Installation** Since it s a direct replacement, it should fit without requiring machining or special tools, making it accessible for DIYers.

6. **Long-Term Reliability** A properly installed seal can last the remaining life of the engine if maintained correctly, reducing future repair needs.

7. **Widely Available** As an OEM-style part, it can be sourced from multiple suppliers, ensuring availability if replacements are needed.

#### **Cons:**

1. **Cost** While not excessively expensive, it may be pricier than generic aftermarket alternatives, especially if purchased from a specialty supplier.

2. **Potential for Counterfeit Parts** Some online sellers may offer knockoff versions that don t meet the same quality standards. Buying from a trusted source is essential.

3. **Labor-Intensive Replacement** Removing and reinstalling the crankshaft seal requires disassembling parts of the drivetrain (transmission, differential, or rear end), which can be time-consuming and physically demanding.

4. **Risk of Damage During Removal** If the seal is seized or the surrounding components are worn, improper removal could lead to additional damage (e.g., bent seal retainer tabs, warped surfaces).

5. **Limited Lifespan if Engine is Old** If the rest of the engine is worn (e.g., worn bearings, rod journals), replacing just the seal may not fully resolve long-term reliability issues.

6. **Torque Specifications Must Be Followed** Over-tightening or under-tightening the seal retainer can cause leaks or damage. Precision is required during installation.

---

### **Conclusion**

The **API PDL 72MWJR crankshaft seal** is a strong choice for your 1977-1978 2.0L Gremlin due to its direct fitment, reliability, and compatibility with your engine. While it has some drawbacks primarily related to installation difficulty and cost these are outweighed by the benefits of preventing oil leaks and potential engine damage. The key to success lies in purchasing from a reputable supplier and ensuring careful, precise installation.

### **Recommendation**

**Buy this seal if:**

- You re experiencing or suspecting a crankshaft seal leak.

- You re comfortable with (or can access professional help for) the installation process.

- You want a high-quality, long-lasting solution without compromising on fitment.

**Avoid if:**

- You re unsure about the installation process and lack the tools or expertise to do it correctly.

- The rest of the engine is severely worn, as replacing just the seal may not be a permanent fix.

- You find a similarly rated aftermarket seal at a significantly lower price from a trusted brand (e.g., Fel-Pro, Sealed Power).

**Final Suggestion:**

- Purchase from a dealer like **RockAuto, PartsGeek, or a local auto parts store** to ensure authenticity.

- Consider breaking down the drivetrain gradually (e.g., remove the transmission first, then the seal) if you re doing it yourself to avoid rushing.

- If unsure, consult a mechanic for installation to avoid costly mistakes.

Details:

12 Month Warranty.

part #: 72mwjr price

  • $20.29

specifications cranshafengin:

  • for years: 1977-1978
  • brand: Api Pdl
  • mpn: 72mwjr
  • part type: Seal Crankshaft Motor
  • engine: 2.0l 4 Cyl
  • compatible make/model: American Motors Gremlin
  • compatible years: 1977 1978 77 78
  • fitment info: Pdl 1.86 O.d.; 0.394 Width
  • manufacturer warranty: 12 Month Warranty
  • attention: Read Full Description To Confirm Fitment
  • cs-sku: 400

offer cranshafengin:

  • options: Ship-to-home
  • sold: 0
  • started: March 26, 2026
  • availability: In Stock
  • quantity: 1

shipping cranshafengin:

  • transit: 2-6 Days
  • service: Economy
  • type: Fixed
  • cost: $0.00
  • class: Economy

seller cranshafengin:

  • # reviews: 23435
  • rating: 99.1%
  • city: Kansas City, Missouri

returns cranshafengin:

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

general cranshafengin:

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

payments cranshafengin:

  • wallet: Paypal
  • credit card: Discover
  • other
for years: 1977-1978, part type: seal crankshaft motor, engine: 2.0l 4 cyl, compatible make/model: american motors gremlin, compatible years: 1977 1978 77 78, fitment info: pdl 1.86 o.d.; 0.394 width, manufacturer warranty: 12 month warranty, attention: read full description to confirm fitment, cs-sku: 400,
category: auto parts > car truck parts accessories > engines engine parts > crankshafts, sku: 19504918725961731,
Api Pdl 72MWJR Is Similar To:
cranshafengin logo
1 offer $20.29 USD
  • New. Offer #1 priced at $20.29 + $0.00 shipping estimate = $20.29* total. 12 Month Warranty Notes: PDL -- 1.86" O.D.; 0.394" width.FREE SHIPPING

Copyright © cranshafengin.com