Fast delivery within 72 Hours
Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Inframe Engine Rebuild Kit, New (IF4955642)
โ Replace Part Number: IF4955642
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?
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 sell Rebuild Kits with new parts, zero core charges, and a 6-month warranty. On top of only offering premium quality parts, we also make sure you save up to 50% off OEM prices. So, when it comes to your rebuild, what’s left to want?
Need a little extra proof? Let’s talk Rebuild Kits.
- Get proper fit and function with a brand new Inframe Rebuild Kit built to OEM specifications to extend and restore the life of your engine.
- Here at 4BTdiesel we understand quality is a top priority. To ensure you receive the quality and consistency you depend on, we make certain your kit is manufactured an assembled in an ISO 9001:2008 certified facility.
- Put the OEM to shame with all brand new parts ofย equal or better quality than they provide, at a much lower price and no core charge!
- Keep your engine sturdy over time with CNC turned pistons to precise tolerances andย computer controlled piston machining to maintain proper clearances within your engine.
- Think you’re tough? These connecting rod and main bearing are crafted with tri-metal material for durability. That’s tougher than your average Joe!
- Stop leakage with the correct materials to ensure gasket has excellent performance in functionality and sealibility.
- Make your rig great! Sealing products are proudly made in the USA and are 100% asbestos-free material.
- Keep oil where it needs to be with oil control rings designed with precise tangential tension for maximum oil control.ย
- Get the extra mile withย piston pins hardened and tempered for improved strength and wear resistance.ย You can’t beat it!
Kit Contents:
- (6) .50mm Piston Kits
- (12) Piston Pin Retainers
- (6) .50mm Engine Pistons
- (6) Piston Pins
- (6) .50mm Piston Ring Sets
- (6) .50mm Top Piston Ring
- (6) .50mm Standard Piston Ring
- (6) .50mm Oil Piston Ring
- (1) Main Bearing Set
- (1) Thrust Bearing
- (6) Main Bearings
- (7) Main Bearings
- (1) Lower Thrust Bearing
- (6) Connecting Rod Bearings
- (6) Connecting Rod Bearings
- (1) Oil Pan Gasket
- (1) Oil Suction Connection Gasket
- (1) Oil Pan Gasket
- (1) Upper Engine Gasket Set
- (1) O-Ring Seal
- (1) Thermostat Seal
- (5) Sealing Washers
- (1) Sealing Washer
- (7) Sealing Washers
- (2) Gaskets
- (6) Injector Seals
- (6) O-Ring Seals
- (2) O-Ring Seals
- (2) Turbocharger Oil Drain Gaskets
- (2) O-Ring Seals
- (1) Accessory Drive Cover Gasket
- (1) O-Ring Seal
- (1) Valve Cover Gasket
- (1) Rocker Lever Housing Gasket
- (1) Oil Drain Gasket
- (1) Cylinder Head Gasket
- (1) O-Ring Seal
- (6) Exhaust Manifold Gaskets
- (1) O-Ring Seal
- (1) Seal
- (2) Turbocharger Hose O-Ring Seals
- (2) O-Ring Seals
- (1) Intake Manifold Cover Gasket
- (1) Turbocharger Gasket
Warranty
6-month warranty.
What Rebuild Kit and Gasket Set Includes
| Qty | Component | Part Number |
|---|---|---|
| 6 | .50mm Piston Kit | 4955642, 4943264, 4936982 |
| 12 | Piston Pin Retainers | CUM3901706, 3920691, 3901706, 3284366 |
| 6 | .50mm Engine Pistons | 4955642, 4943264, 4936982 |
| 6 | Piston Pins | 4931041 |
| 6 | .50mm Piston Ring Sets | 4955641, 4931044 |
| 6 | .50mm Top Piston Ring | 4931042 |
| 6 | .50mm Standard Piston Ring | 4931044 |
| 6 | .50mm Oil Piston Ring | 4932802 |
| 1 | Main Bearing Set | 4955352, 3357480 |
| 1 | Thrust Bearing | 3927772 |
| 6 | Main Bearings | 3929016 |
| 7 | Main Bearings | 3929021 |
| 1 | Lower Thrust Bearing | 3978824, 3945528 |
| 6 | Connecting Rod Bearings | CUM3901170, 3969562, 3939859, 3901230, 3901170 |
| 6 | Connecting Rod Bearings | 4893693 |
| 1 | Oil Pan Gasket | 4934344, 4897861 |
| 1 | Oil Suction Connection Gasket | 4898301 |
| 1 | Oil Pan Gasket | 4337596, 3959797, 3955106 |
| 1 | Upper Engine Gasket Set | 4955229 |
| 1 | O-Ring Seal | 2830409 |
| 1 | Thermostat Seal | 3954829 |
| 5 | Sealing Washers | 3963983, 3935171, 3918191, 3903037, 3283280 |
| 1 | Sealing Washer | 3963988, 3937155, 3935172 |
| 7 | Sealing Washers | 3963990, 3957427 |
| 2 | Gaskets | 3969988, CUM3931604, 3949473, 3938158, 3931604, 3913352 |
| 6 | Injector Seals | 3976371 |
| 6 | O-Ring Seals | 3977393 |
| 2 | O-Ring Seals | 4010643 |
| 2 | Turbocharger Oil Drain Gaskets | 4891288 |
| 2 | O-Ring Seals | 3678603 |
| 1 | Accessory Drive Cover Gasket | 4896897 |
| 1 | O-Ring Seal | 4898372 |
| 1 | Valve Cover Gasket | 4899226, 4897569, 5309255 |
| 1 | Rocker Lever Housing Gasket | 4899231 |
| 1 | Oil Drain Gasket | 4931365, 3949499, 5264568 |
| 1 | Cylinder Head Gasket | 4932210, 4929656 |
| 1 | O-Ring Seal | 3678925, 4944960 |
| 6 | Exhaust Manifold Gaskets | 5266422, 3955339, 5447591 |
| 1 | O-Ring Seal | 3867646 |
| 1 | Seal | 3906698, CUM3906698 |
| 2 | Turbocharger Hose O-Ring Seals | 3922794, 3883963 |
| 2 | O-Ring Seals | 3928624 |
| 1 | Intake Manifold Cover Gasket | 3947530 |
| 1 | Turbocharger Gasket | 3949530 |
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: IF4955642
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.
