ITM ENGINE 15-04002 Mgb Rear Crankshaft Seal 760999833644

( Brand: Itm Engine ), ( Manufacturer Part Number: 15-04002 ), ( Part Type: Seal Crankshaft ), ( Product Type: Engine ), ( UPC: 760999833644 ), ( Fitment Type: Direct Replacement ), ( Compatible Make S : Mg ), ( Compatible Model S : Mgb ), ( Product Subtype: Crankshafts ), ( Product Details: Engine Crankshaft Seal ), ( Department: Replacement )

Review ITM ENGINE Mg Mgb Rear Crankshaft Seal fits 1974–1980

The **ITM Engine Part Number 15-04002** is a high-performance, precision-engineered rear crankshaft seal designed specifically for the classic **MG MGB (1974 1980)** models, ensuring optimal reliability and longevity for this iconic British sports car. Crafted from durable **nitrile rubber with a reinforced fiberglass-reinforced lip**, this seal is engineered to withstand the demanding conditions of high-revving engines while maintaining a tight, leak-proof seal against the crankshaft s polished surface. The **smooth, low-friction design** minimizes wear on both the seal and the crankshaft, reducing the risk of premature failure a common issue in older MGB engines prone to oil leaks and crankshaft damage. This seal features a **metal backing ring** for added structural integrity, preventing deformation under pressure and ensuring consistent performance even after prolonged use. Compatible with the **2.0L and 2.5L inline-six engines** found in the later MGB models (1974 1980), the ITM 15-04002 is a direct replacement for the original equipment seal, offering superior durability compared to aftermarket alternatives that may lack the same level of precision or material quality. Whether installed during routine maintenance or as part of a full engine rebuild, this seal provides a reliable barrier against oil leaks, protecting critical components from contamination and extending the life of the engine. Built to meet or exceed OEM specifications, it is an essential upgrade for enthusiasts seeking to restore or preserve the performance and longevity of their MGB s powerplant.

### Pros and Cons of buying a ITM Engine Part Number 15-04002 (Rear Crankshaft Seal for MGB 1974 1980)

1. **Direct Fitment** The ITM part is specifically designed for MGB models from 1974 to 1980, ensuring compatibility without modifications. This reduces the risk of installation issues or improper sealing.

2. **Quality Materials** ITM (International Truck & Marine) is known for producing durable rubber and elastomeric seals that resist oil degradation and heat better than some aftermarket alternatives. This can extend the life of the seal compared to cheaper, generic replacements.

3. **Ease of Installation** The part is pre-formed and designed to fit the MGB s crankshaft housing without excessive cutting or reshaping, which can be a hassle with poorly sized seals. This saves time and reduces the chance of damaging surrounding components.

4. **Warranty and Support** ITM parts often come with a warranty (typically 12 24 months), providing peace of mind in case of premature failure. Their customer service is generally reliable for troubleshooting or replacements if needed.

5. **Prevents Oil Leaks** A failing rear main seal is a common source of oil leaks in MGB engines, leading to engine damage if ignored. A proper seal like this helps maintain lubrication and prevents costly internal contamination.

6. **Compatibility with Common Modifications** Since the MGB s engine bay is relatively standard in this era, the ITM seal should work well even if the engine has minor modifications (e.g., upgraded camshafts or headers), as long as the crankshaft housing isn t altered significantly.

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1. **Cost** ITM parts are priced higher than some generic or budget-brand seals. For an MGB owner on a tight budget, this may be a significant outlay, especially if other related components (e.g., gaskets, bolts) need replacement during installation.

2. **Potential Overkill for Minor Use** If the MGB is rarely driven or stored in ideal conditions (cool, dry, well-ventilated), a high-quality seal like this may not be necessary immediately. A slightly cheaper seal could suffice for short-term use.

3. **Installation Complexity** While the seal itself is easy to fit, the process often requires draining the oil, removing the rear crankshaft housing, and cleaning the mating surfaces thoroughly. Inexperienced DIYers might struggle with this, potentially leading to mistakes like cross-threading bolts or improper sealing.

4. **Availability and Lead Times** Depending on the region, ITM parts may not be stocked at every auto parts store, requiring an order from a specialty supplier. This could introduce delays if the seal is needed urgently.

5. **Risk of Over-Tightening** The crankshaft housing bolts must be torqued to specification to avoid warping the housing or damaging the seal. Over-tightening is a common mistake that can compromise the seal s effectiveness.

6. **Limited Longevity Guarantee** While ITM seals are durable, they are not indestructible. In high-mileage or heavily modified engines, the seal may still fail prematurely if the engine runs hot, lacks proper lubrication, or has excessive vibration.

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### **Conclusion and Recommendation**

The **ITM Engine Part Number 15-04002** is a **strong, reliable choice** for replacing the rear crankshaft seal in an MGB from 1974 1980. Its direct fitment, quality construction, and warranty make it a **practical investment** for owners who prioritize longevity and ease of installation. However, the higher cost and potential complexity of installation may not justify the purchase for casual or short-term use.

- You are performing a full engine service or rebuild and want a high-quality, long-lasting seal.

- Your MGB is driven regularly or used for performance (where seal integrity is critical).

- You are comfortable with the installation process or have access to a mechanic experienced with MGB engines.

- You are on a tight budget and the MGB is not heavily used. A **name-brand generic seal** (e.g., Fel-Pro or Gates) may suffice for now, though it may require replacement sooner.

- You are unsure about your ability to install it properly. In this case, consult a trusted MGB specialist to avoid costly mistakes.

- You are storing the car long-term and can afford to monitor the seal s condition before replacement.

**Final Verdict:** For most MGB owners who want a **durable, hassle-free solution**, the ITM seal is the **best choice**. The upfront cost is outweighed by its performance and reliability, especially in engines that see regular use. If cost is a major concern, weigh the risks of a cheaper seal against the potential for future oil leaks or engine damage.

Details:

Made with maximum safety and reliability in mind. Features: designed with innovative manufacturing techniques. This product is distinguished by total quality assurance, unsurpassed anybody else. Rear Crankshaft Seal by ITM Engine.

Precise Engineering ensures the latest in quality.

part #: 1504002 prices

• $24.26-$26.18

specifications cranshafengin:

• for years: 1974-1980
• brand: Itm Engine
• mpn: 15-04002
• part type: Seal Crankshaft
• product type: Engine
• upc: 760999833644
• fitment type: Direct Replacement
• compatible make s : Mg
• compatible model s : Mgb
• product subtype: Crankshafts
• product details: Engine Crankshaft Seal
• department: Replacement

seller cranshafengin:

• city: Carson, California
• # reviews: 13276
• rating: 95.7%

shipping cranshafengin:

• type: Calculated
• transit: 5-8 Days
• service: FedEx Ground / FedEx Home Delivery
• cost: $20.50
• carrier: FedEx
• class: Standard

offer cranshafengin:

• sold: 0
• options: Ship-to-home
• started: June 5, 2026
• availability: In Stock
• quantity: 5

returns cranshafengin:

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

payments cranshafengin:

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

general cranshafengin:

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

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