The Rear Oil Seal Crankshaft for Isuzu 4JJ1 / 4JB1 engines is built to provide exceptional sealing performance and prevent oil leaks at the rear end of the crankshaft. Designed with OEM precision, it ensures an exact fit and maximum protection against oil loss, helping maintain optimal engine lubrication and performance.
Manufactured using heat-resistant, oil-resistant, and wear-resistant rubber, this seal guarantees long service life and stability even in high-temperature and high-pressure conditions. Ideal for Isuzu light trucks and pickups, this seal helps restore your engine’s integrity and prevents contamination or bearing damage caused by oil leaks.
Key Features:
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Compatible with Isuzu 4JJ1 and 4JB1 diesel engines
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OEM-spec fit for perfect sealing performance
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Prevents engine oil leakage and crankshaft wear
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Constructed from durable, high-grade rubber and metal materials
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Resistant to heat, oil, and abrasion for long service life
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Maintains proper lubrication and engine efficiency
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Ideal for engine rebuilds or preventive maintenance
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Easy to install and ensures factory-level performance
Compatible Applications:
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Engine Models: Isuzu 4JJ1, 4JB1
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Vehicle Models: Isuzu NPR, NQR, D-MAX, ELF series, and other light trucks
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Fitment Type: Direct OEM replacement
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Function: Rear crankshaft oil seal to prevent oil leakage and protect engine internals
Frequently Asked Questions (FAQ)
What does the rear oil seal do?
The rear oil seal prevents engine oil from leaking where the crankshaft exits the rear of the engine block, ensuring proper lubrication and preventing contamination.
Is this seal compatible with both 4JJ1 and 4JB1 engines?
Yes, this rear oil seal is designed to fit both Isuzu 4JJ1 and 4JB1 diesel engines with OEM precision.
Can I install this oil seal myself?
Yes, but it’s recommended that a qualified mechanic performs installation to ensure proper alignment and avoid damage during fitting.
When should I replace the rear oil seal?
If you notice oil leakage at the back of the engine or oil dripping between the engine and transmission, it’s time to replace the rear oil seal.
Is this an OEM or aftermarket part?
This rear oil seal is manufactured to meet OEM specifications, ensuring the same fit, quality, and durability as the original factory part.
Rear Oil Seal crankshaft | Isuzu 4JJ1/ 4JB1 Engine
OE Replacement: Not Available
Fits Following: Isuzu NHR NPR NKR Reach 4JJ13.0L 4JB12.8L New Oem
Year: 2006-2014
