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Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Inframe Engine Rebuild Kit, New (IF3957801)
โ Replace Part Number: IF3957801
โ Fit for: Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L engines
โ Built to OEM specs for a proper fit
โ Send us an inquiry for price
Diesel parts can vary between engine builds. If you choose not to provide an ESN or CPL, we may not be able to confirm fitment before an order is shipped. Please check the part number and engine application carefully to help avoid selecting the wrong part.
Hassle-free 30-day return policy for a risk-free shopping experience.
3 Months Warranty
Enjoy 3-month warranty, ensuring long-lasting reliability and peace of mind.
2-7 Days Fast Delivery
Receive your order within 2 to 7 days, ensuring fast and reliable delivery.
24/7 Service
Round-the-clock support to assist you whenever you need it.
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30-Day Money Back
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2-7 Days Fast Delivery
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6 Months Warranty
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24/7 Service
Product Details
Think you know the truth about Aftermarket Rebuild Kits? We’d bet you’d be surprised.
It’s no secret, rebuilding your rig is one of the most labor (and wallet) intensive repairs out there. Sure, you want your engine to last another million miles but you also want the best price; so what should you choose- OEM or Aftermarket?ย
When it comes to engine parts, the aftermarket often gets a bad rep. The idea that aftermarket retailers sell cheap parts with zero warranty, delivered in a beat-up box written in another language couldn’t be further from the truth. 4BTdiesel is here to set the record straight; we only sellย Rebuild Kits with new parts, zero core charges, and a 6-month warranty.ย On top of only offering premium quality parts, we also make sure youย save up to 50% off OEM prices.ย So, when it comes to your rebuild, what’s left to want?ย
Need a little extra proof? Let’s talk Rebuild Kits.
- You’llย sleep soundlyย knowing all parts areย built to OEM specifications ensuring proper fitment and function.
- Get the best of both worlds with a rebuild kitย equal or better qualityย compared to theย OE at a much lower price.ย You can’t beat that!
- Go the extra mile, or a million extra miles withย piston pins hardened and tempered for improved strength and wear resistance. Ever hear of the little engine that could? We bet he had these piston pins.
- Want durability? You got it! Rod and main bearings are constructed with a tri-metal materialย to extend the life of your engine.
- Trust the experts with a rebuild kit manufactured and assembled in anย ISO 9001:2008 certified facility. Simply put, it’s quality and consistency you can count on.
- Maximize your engine withย CNC turned pistonsย to precise tolerances giving you theย reliabilityย you expect from 4BTdiesel.
- You are neverย settling for sub-par parts!ย The gaskets used in this rebuild kit are made ofย the correct materials for excellent performance in functionality and leak free durability.ย It doesn’t get much better than that!
- All of the sealing products in this kit areย proudly made in the USAย andย 100% asbestos-free.
- This new rebuild kit willย restore your engine to good working orderย andย extend the lifeย of it into the next generation of the family business.
Kit Contents:
- (1) Main Bearing
- (6) 1.00mm Piston Kits
- (12) Piston Pin Retainers
- (6) Piston Pins
- (6) 1.00mm Engine Pistons
- (6) 1.00mm Piston Ring Sets
- (6) Oil Piston Rings
- (6) Compression Piston Rings
- (6) Compression Piston Rings
- (6) Connecting Rods
- (6) Connecting Rods
- (1) Gasket
- (1) Oil Pan Gasket
- (1) Upper Engine Gasket Set
- (6) Rocker Cover Bolt Seals
- (1) Metal Gasket
- (2) Washers
- (6) Injector Sleeves
- (6) Injector Seals
- (1) Thermostat Seal
- (6) Injector Seals
- (6) Valve Cover Gaskets
- (6) Noise Isolators
- (1) Rectangular Ring Seal
- (1) Cylinder Head Gauge
- (6) Mid Range XPI Injector Seals
- (1) Turbo Oil Drain Gasket
- (1) Intake Manifold Gasket
- (2) Gaskets
- (2) Sealing Washers
- (6) Exhaust Manifold Gaskets
- (12) Valve Stem Seals
- (1) O-Ring Seal
- (1) Cylinder Head Gasket
- (6) Washers
- (1) Gasket
- (1) Sealing Washer
- (6) Banjo Seals
- (1) Rectangular Ring Seal
- (1) Washer
Warranty
6-month warranty.
What Rebuild Kit and Gasket Set Includes
| Qty | Component | Part Number |
|---|---|---|
| 1 | Main Bearing | 3800290, 3802070, 4955853, 861260 |
| 6 | 1.00mm Piston Kits | 3957801 |
| 12 | Piston Pin Retainers | 3284366, 3901706, 3920691, CUM3901706 |
| 6 | Piston Pins | 3919053, 3934047, CUM3934047 |
| 6 | 1.00mm Engine Pistons | 3957800 |
| 6 | 1.00mm Piston Ring Sets | 3938199 |
| 6 | Oil Piston Rings | 3933586 |
| 6 | Compression Piston Rings | 3937429 |
| 6 | Compression Piston Rings | 3937431 |
| 6 | Connecting Rods | 3901170, 3901230, 3939859, 3969562, CUM3901170 |
| 6 | Connecting Rods | 4893693 |
| 1 | Gasket | 3900454, 3905468, 3914383, 3931349, 3938157, CUM3931349 |
| 1 | Oil Pan Gasket | 3901287, 3904577, 3906028, 3911536, 3931346, 3937072, 3959052, CUM3911536 |
| 1 | Upper Engine Gasket Set | 4089649 |
| 6 | Rocker Cover Bolt Seals | 3910824, 3901837 |
| 1 | Metal Gasket | 3912220, 3903251 |
| 2 | Washers | 3918188, 3903728 |
| 6 | Injector Sleeves | 3919358, CUM3919358 |
| 6 | Injector Seals | 3923261, 3919725, CUM3923261 |
| 1 | Thermostat Seal | 3923331, CUM3923331, 3920020, 3903301 |
| 6 | Injector Seals | 3930324 |
| 6 | Valve Cover Gaskets | 3930906, 3902666, 3902494 |
| 6 | Noise Isolators | 3935449, 3928406 |
| 1 | Rectangular Ring Seal | 3936876, 3902363 |
| 1 | Cylinder Head Gauge | 3823921, CUM3823921 |
| 6 | Mid Range XPI Injector Seals | 3937142 |
| 1 | Turbo Oil Drain Gasket | 3937706, CUM3937706, 5264569, 3942725, 3931350, 3928919, 3914388, 3819378, 3285747, 3282113 |
| 1 | Intake Manifold Gasket, 3938152, CUM3931347, 3931347, | |
| 2 | Gaskets | 3969988, CUM3931604, 3949473, 3938158, 3931604, 3913352 |
| 2 | Sealing Washers | 3963988, 3937155, 3935172 |
| 6 | Exhaust Manifold Gaskets | 3929881 |
| 12 | Valve Stem Seals | 3957912 |
| 1 | O-Ring Seal | 3883284, CUM3883284 |
| 1 | Cylinder Head Gasket | 3283335, CUM3283335, 3921394, 3918305, 3917358, 3917357, 3915730, 3908997, 3907057, 3905026, 3283570, 3283192, 3282805 |
| 6 | Washers | 3900808 |
| 1 | Gasket | 3901356, CUM3901356 |
| 1 | Sealing Washer | 3902425, CUM3902425 |
| 6 | Banjo Seals | 3903380, CUM3903380, 4942278 |
| 1 | Rectangular Ring Seal | 3906694 |
| 1 | Washer | 3906773 |
Specifications
| Brand | 4BTdiesel |
|---|---|
| Compatible Brand | For CUMMINS |
| Compatible Engine Brand | For CUMMINS |
| Condition | New |
Shipping Spec
| Weight | 16.329 kg |
|---|---|
| Dimensions | 71.1 × 41.9 × 33.7 cm |
โ Replace Part Number: IF3957801
โ Fit for: Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L engines
โ Built to OEM specs for a proper fit
โ Send us an inquiry for price
Warranty
For new Cummins parts, we provide 90-day warranty. Quality is our commitment. 4BTDiesel ensures your peace of mind! For complete warranty details, please view our Warranty Policy.
Shipping
We ship worldwide and offer full expedited delivery to ensure your construction machinery back in action, fast. Check out our Shipping Policyย for more details.
Easy Return
We prioritize your satisfaction. If your order doesn't meet your expectations within 90 days, you may be eligible for a refund. See our Easy Return Policy for details.
