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Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Inframe Engine Rebuild Kit, New (IF3806239M)
โ Replace Part Number: IF3806239M
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.
- This rebuild kit is built to OEM specifications with equal or better quality than the OE at a much lower price. You can’t beat that!
- This kit contains all brand new parts that are manufactured and assembled in an ISO 9001:2008 certified facility ensuring proper engine fitment and function. Plus, no core charge since it is all new parts. More money in your pocket!
- Our CNC turned pistons to precise tolerances gives you excellent quality paired with consistency.
- These piston pins are not your average pins. They are hardened and tempered for improved strength and wear resistance.
- Keep your engine running till the cows come home with connecting rods and main bearings crafted with tri-metal for durability.
- Let’s seal the deal with gaskets made from the correct materials for excellent performance in functionality and sealability.
- We deliver the highest quality of sealing products that are proudly made in the USA, using 100% asbestos-free materials.
- Our on staff professionally certified factory mechanics are here to help restore your diesel to good working condition, extending it’s life.
Kit Contents:
- (1) Main Bearing
- (6) Piston Kits
- (6) Piston Ring Sets, 3802790, 3802951, CUM3802951
- (6) Top Piston Rings, 3940530
- (6) .020 Compression Piston Rings, 3942265
- (6) Oil Control Piston Rings, 3932520
- (12) Piston Pin Retainers
- (6) Engine Pistons
- (6) Piston Pins
- (1) Gasket
- (12) Connecting Rod Bearings
- (1) Oil Pan Gaskets
- (1) Upper Engine Gasket Set
- (1) Cylinder Head Gasketย
- (1) O-Ring Seal
- (1) Gasket
- (1) Sealing Washer
- (1) Seal
- (1) Washer
- (1) O-Ring Valve Cover Seal
- (1) Metal Gasket
- (2) Washers
- (12) Valve Stem Seals
- (1) Thermostat Seal
- (6) Exhaust Manifold Gaskets
- (6) Valve Cover Gaskets
- (6) Noise Isolators
- (1) Rectangular Ring Seal
- (1) Gasket
- (1) Intake Manifold Gasket
- (12) Valve Stem Seals
- (2) Sealing Washers
Warranty
6-month warranty.
What Rebuild Kit and Gasket Set Includes
| Qty | Component | Part Number |
|---|---|---|
| 1 | Main Bearing | 3800290, 3802070, 4955853, 861260 |
| 6 | Piston Kits | 3802630, CUM3802630 |
| 6 | Piston Ring Sets | 3802790, 3802951, CUM3802951 |
| 6 | Top Piston Rings | 3940530 |
| 6 | .020 Compression Piston Rings | 3942265 |
| 6 | Oil Control Piston Rings | 3932520 |
| 12 | Piston Pin Retainers | 3284366, 3901706, 3920691, CUM3901706 |
| 6 | Engine Pistons | 3922687 |
| 6 | Piston Pins | 3919053, 3934047, CUM3934047 |
| 1 | Gasket | 3900454, 3905468, 3914383, 3931349, 3938157, CUM3931349 |
| 12 | Connecting Rod Bearings | 3901170, 3901230, 3939859, 3969562, CUM3901170 |
| 1 | Oil Pan Gaskets | 3901287, 3904577, 3906028, 3911536, 3931346, 3937072, 3959052, CUM3911536 |
| 1 | Upper Engine Gasket Set | 2881955 |
| 1 | Cylinder Head Gasket | 3282805, 3283192, 3283335, 3283570, 3905026, 3907057, 3908997, 3915730, 3917357, 3917358, 3918305, 3921394, CUM3283335 |
| 1 | O-Ring Seal | 3883284, CUM3883284 |
| 1 | Gasket | 3901356, CUM3901356 |
| 1 | Sealing Washer | 3902425, CUM3902425 |
| 1 | Seal | 3906694 |
| 1 | Washer | 3906773 |
| 1 | O-Ring Valve Cover Seal | 3901837, 3910824 |
| 1 | Metal Gasket | 3903251, 3912220 |
| 2 | Washers | 3903728, 3918188 |
| 12 | Valve Stem Seals | 3901097, 3921639, 3921640, CUM3921640 |
| 1 | Thermostat Seal | 3903301, 3920020, 3923331, CUM3923331 |
| 6 | Exhaust Manifold Gaskets | 3929881 |
| 6 | Valve Cover Gaskets | 3902002, 3914029, 3931347, 3938152, CUM3931347 |
| 6 | Noise Isolators | 3928406, 3935449 |
| 1 | Rectangular Ring Seal | 3902363, 3936876 |
| 1 | Gasket | 3282113, 3285747, 3819378, 3914388, 3928919, 3931350, 3937706, 3942725, 5264569, CUM3937706 |
| 1 | Intake Manifold Gasket | 3902002, 3914029, 3931347, 3938152, CUM3931347 |
| 12 | Valve Stem Seals | 3957912 |
| 2 | Sealing Washers | 3935172, 3937155, 3963988 |
Specifications
| Brand | 4BTdiesel |
|---|---|
| Compatible Brand | For CUMMINS |
| Compatible Engine Brand | For CUMMINS |
| Condition | New |
Shipping Spec
| Weight | 16.329 kg |
|---|---|
| Dimensions | 50.8 × 38.1 × 50.8 cm |
โ Replace Part Number: IF3806239M
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.
