JAGUAR 300-83242 Engine Motor Federal Cylinder 4.2L 7TH

( Manufacturer Part Number: 1986 ), ( Engine Size: 4.2 ), ( Fuel Type: Gasoline ), ( Type: Engine ), ( Number Of Valves: 18 ), ( Performance Part: No ), ( Items Included: Wiring Harness, Hose, Oil Pan, Oil Filter, Exhaust Manifold ), ( Manufacturer Warranty: 30 Day ), ( Country Of Origin: United Kingdom ), ( Ipn: 300-83242 )

Review JAGUAR 4.2l Engine Motor Vin 7th Digit Federal Cylinder Oem fits XJ6 XJ40 1986–1987

The Jaguar 300-83242 engine motor is a high-performance component designed specifically for Jaguar XJ6 and XJ40 models produced between 1986 and 1987. This engine is powered by a 4.2-liter, straight-six cylinder engine, which is commonly referred to as the 7th federal cylinder due to the emissions regulations it adheres to.

This engine motor is renowned for its impressive power output and refined performance. The straight-six cylinder configuration provides an even power delivery, minimizing vibrations and offering smooth acceleration. The 4.2-liter displacement offers ample torque, providing excellent response and responsiveness.

The cylinder block of this engine motor is made of high-strength iron, ensuring durability and longevity. The cylinder heads are constructed from aluminum, which not only reduces weight but also helps to dissipate heat efficiently. The engine also features a multi-point fuel injection system, which delivers precise fuel delivery to each cylinder for optimal combustion and efficient fuel usage.

This engine motor is equipped with a modern ignition system, featuring a distributorless ignition coil and a high-energy ignition spark plug. This system provides reliable ignition and improves engine performance, ensuring a smooth and responsive driving experience.

The Jaguar 300-83242 engine motor is also designed with emissions regulations in mind. It features a catalytic converter and an exhaust gas recirculation system, which help to reduce harmful emissions and improve overall engine performance.

Overall, the Jaguar 300-83242 engine motor is a high-performance component that offers impressive power output and refined performance. Its durable design and adherence to emissions regulations make it an excellent choice for Jaguar XJ6 and XJ40 owners looking to upgrade their engine or restore their classic vehicle to its former glory.

Buying a Jaguar 300-83242 86-87 XJ6 XJ40 4.2L engine motor, seventh federal cylinder, comes with several pros and cons that potential buyers should consider before making a decision.

1. Jaguar engines are known for their power and performance, and this 4.2L unit is no exception. It delivers a smooth and responsive driving experience.

2. The seventh federal cylinder is a reconditioned part, which means it has been inspected, repaired, and tested to meet Jaguar's quality standards. It can save buyers the cost and hassle of rebuilding or replacing a failed cylinder.

3. The engine is compatible with various Jaguar models, making it a versatile option for owners of older XJ6 and XJ40 models.

1. Reconditioned parts may not last as long as new ones, and there is always a risk of failure. However, the seller usually provides a warranty to cover any defects.

2. The cost of the seventh federal cylinder may be higher than buying a used engine or having the existing one rebuilt, depending on the market conditions and the buyer's location.

3. Installing the cylinder may require professional help, which could add to the overall cost.

The decision to buy a Jaguar 300-83242 86-87 XJ6 XJ40 4.2L engine motor, seventh federal cylinder, ultimately depends on the individual's circumstances. If the buyer values the performance and reliability of a Jaguar engine and wants to save the cost of a new cylinder, then this option could be worth considering. However, if the budget is tight or the risk of future failures is unacceptable, then it may be wiser to explore alternative solutions, such as buying a used engine or having the existing one rebuilt.

Before making a purchase, buyers should ensure they are dealing with a reputable seller and inquire about the warranty coverage and return policy. They should also consider the cost of installation and the potential for future repairs and maintenance. Ultimately, buyers should weigh the benefits and drawbacks carefully and consult with a Jaguar specialist if they have any doubts.

Details:

Simply drop us a message with your car model and we'll quickly confirm the fitment. Orders placed before 0800 ECT are dispatched on the same day.

specifications grokengines:

• for models: Xj6, Xj40
• for makes: Jaguar
• for years: 1986-1987
• mpn: 1986
• engine size: 4.2
• fuel type: Gasoline
• type: Engine
• number of valves: 18
• performance part: No
• items included: Wiring Harness, Hose, Oil Pan, Oil Filter, Exhaust Manifold
• manufacturer warranty: 30 Day
• country of origin: United Kingdom
• ipn: 300-83242

seller grokengines:

• rating: 99.5%
• city: Lumberton, New Jersey
• # reviews: 7936

offer grokengines:

• availability: In Stock
• started: December 25, 2025
• best offers: True
• quantity: 1
• sold: 0
• options: Ship-to-home

returns grokengines:

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

general grokengines:

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

payments grokengines:

• credit card: Diners-club
• other
• wallet: Paypal

shipping grokengines:

• service: Flat Rate Freight
• cost: $499.00
• type: Fixed
• class: Freight

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