Fast delivery within 72 Hours
Cummins B-Series Engine Rebuild Kit, New (MOH38007856B)
โ Replace Part Number: MOH38007856B, OH3800785 etc.
โ Fit for: Cummins applications; confirm fitment
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
Having problems with your Cummins B-Series? A new engine rebuild kit from 4BTdiesel may be just what you need!
Extend the life expectancy of your B-Series engine with a quality engine rebuild kit from the certified diesel experts. All engines hit this point eventually โ you need an Engine Rebuild Kit to keep things running. So where do you go? Naturally, you try the OE Engine Rebuild Kit. It’s pricey, but it has everything you need, right? Believe it or not, some OE Engine Rebuild Kits come with used parts. would you do an engine rebuild with used parts? No way.
We believe in only using new, high quality parts in our Cummins B-Series Engine Rebuild Kits. Each part follows OE specifications and tolerances, so you’re getting the best quality without breaking the bank. Our Rebuild Kits are manufactured in an ISO 9001 Certified Facility, and are built with hard-wearing materials for long-lasting durability.
As an added bang for your buck, each new, engine Rebuild Kit for Cummins B-Series comes with zero core charge and support from our professionally certified factory mechanics who are available to answer any of your questions from purchase to installation. From technical knowledge and quality products to fast shipping and customer service, 4BTdiesel can help you find parts..
What Rebuild Kit and Gasket Set Includes
| Qty | Component | Part Number |
|---|---|---|
| 6 | 1.0mm Piston Kits | 3800785, CUM3800785, 3806209, 3804975 |
| 6 | 1.0mm Piston Ring Sets | 3806203, CUM3806203 |
| 12 | Piston Pin Retainers | 3920691, CUM3901706, 3901706, 3284366 |
| 6 | Piston Pins | 3934047, CUM3934047, 3919053 |
| 6 | 1.0mm Engine Pistons | 3946157, 3943712, 3942295, 3800785 |
| 1 | Main Bearing | 3802070, 861260, 4955853, 3800290 |
| 12 | Connecting Rod Bearings | 3969562, CUM3901170, 3939859, 3901230, 3901170 |
| 1 | Upper Engine Gasket Set | 4090035, CUM4089790, 4089790, 3802981, 3800853 |
| 2 | O-Ring Seals | 3037236 |
| 1 | Turbo Oil Drain Gasket | 3937706, 3928919, 3285747, 3931350, 3942725, CUM3937706, 3914388, 5264569, 3282113, 3819378 |
| 1 | Intake Manifold Gasket | 3938152, 3902002, 3914029, 3931347 |
| 5 | Isolators | 3942659 |
| 12 | Valve Stem Seals | 3942989, 3942571 |
| 12 | Valve Stem Seals | 3945438, 3942572 |
| 6 | Gaskets | 3946275, 3943132 |
| 2 | Gaskets | 3969988, 3931604, 3949473, 3938158, 3913352 |
| 1 | Turbocharger Gasket | 3519807, 3765575 |
| 1 | Cylinder Head Gasket | 3977063, 3945803, 3957650, 3942368 |
| 1 | Turbocharger Gasket | 3709861 |
| 6 | O-Ring Seals | 3867043, 3882589 |
| 1 | O-Ring Seal | CUM3883284, 3883284 |
| 1 | Sealing Washer | 3902425 |
| 2 | Turbo Hose O-Ring Seals | 3922794, 3883963 |
| 1 | O-Ring Seal | 3931824 |
| 1 | Valve Cover Gasket | 3935878, 5016356AB, C3935878, FGA0174279, AP0012 |
| 1 | Lower Engine Gasket Set | 3800487, 3800833 |
| 1 | Seal | 3906698 |
| 1 | Copper Gasket | 3920773, 3900216 |
| 8 | Grommet Seals | 3928759 |
| 1 | O-Ring Seal | 3929457 |
| 1 | Filter Head Gasket | 3904426, 3918257, 3929792,3912532, 3901828 |
| 1 | Seal 3935032 | 3930993, 3910503 |
| 6 | Cooling Nozzles | 3937214, 3919002, 3930139 |
| 1 | Gear Housing Gasket | 3916131, 3914384, 3902364, 3940182, 3931351, 3938156, 3907836 |
| 1 | Gasket 3905468 | 3900454, 3931349, 3938157, 3914383 |
| 1 | Rear Cover Gasket | 3901019, 3928493, 4947667, 3914386, 3938159 |
| 1 | Push Rod Cover Gasket | 3900545, 3907617, 3928832, 3904776, 3284623 |
| 1 | Filter Head Gasket | 3942915, 3930907 |
| 1 | O-Ring Seal | 3089240 |
| 2 | O-Ring Seals | 3330202, 4010519 |
| 2 | O-Ring Seals | 3330478 |
| 1 | O-Ring Seal | 3678912 |
| 5 | O-Ring Seals | 3678925, 4944960 |
| 1 | Cover Plate Gasket | 3938706, 3942885 |
| 1 | Oil Pan Gasket | 3911536, 3959052, 3937072, 3931346, 3901287, 3906028, 3904577 |
| 1 | Oil Cooler Core Gasket | 4932124 |
| 1 | Front Crank Seal | 3937111, 3804899, 3904351, 3900709, 3904353 |
| 2 | Sealing Washers | 3902425 |
| 1 | Rectangular Ring Seal | 3903475, 3901856 |
| 1 | Rectangular Ring Seal | 3906697, 3901467 |
| 1 | O-Ring Seal | 3910260 |
| 1 | Rectangular Rear Seal | 3912473, 3906699 |
| 1 | Rear Crankshaft Seal Kit | 3934486, 3909410, 4089342, 3925529, 3904087, 3904089, 3921265 |
| 1 | Seal Installation Tool | 3909409 |
| 1 | Oil Seal | 3970548 |
| 1 | Seal Installation Tool | 4089425 |
| 1 | Seal Installation Tool | 4940231 |
Specifications
| Brand | 4BTdiesel |
|---|---|
| Compatible Brand | For CUMMINS |
| Compatible Engine Brand | For CUMMINS |
| Replacement Part Number | M-OH3800785-6B, OH3800785, OH3800785-6B |
| Condition | New |
Shipping Spec
| Weight | 20.412 kg |
|---|---|
| Dimensions | 11.4 × 33.0 × 34.3 cm |
โ Replace Part Number: MOH38007856B, OH3800785 etc.
โ Fit for: Cummins applications; confirm fitment
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.
