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Cummins 4B Engine Rebuild Kit, New (OH40250724B)
โ Replace Part Number: OH40250724B
โ Fit for: Cummins 4B 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
Having problems with your Cummins 4B? A new engine rebuild kit from 4BTdiesel may be just what you need!
Extend the life expectancy of your 4B 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 4B 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 4B 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. With technical knowledge, quality products, fast shipping and straightforward customer service, 4BTdiesel supports your next repair..
What Rebuild Kit and Gasket Set Includes
| Qty | Component | Part Number |
|---|---|---|
| 4 | Piston Kits | 4025072, 4897935 |
| 4 | Engine Pistons | 3972880, CUM3972880 |
| 8 | Piston Pin Retainers | 3920691, 3284366, 3901706, CUM3901706 |
| 4 | Piston Pins | 3934047, CUM3934047, 3919053 |
| 4 | Piston Ring Sets | 4089258, 3959079, 3947678 |
| 4 | Oil Piston Rings | 3932520 |
| 4 | Compression Piston Rings | 3943447 |
| 4 | Compression Piston Rings | 3959079 |
| 1 | Main Bearing Set | 3802010, 4955855 |
| 1 | Main Bearing | 3929016 |
| 1 | Main Bearing | 3929021 |
| 4 | Connecting Rod Bearings | 3969562, 3901170, 3901230, 3939859, CUM3901170 |
| 4 | Connecting Rod Bearings | 4893693 |
| 1 | Lower Thrust Bearing | 3978824, 3945528 |
| 1 | Lower Gasket Set | 4025108 |
| 1 | O-Ring Seal | 145530 |
| 1 | Rectangular Ring Seal | 3906252, CUM3906252 |
| 1 | Rectangular Ring Seal | 3906697, CUM3906697, 3901467 |
| 1 | Seal | 3906698, CUM3906698 |
| 1 | O-Ring Seal | 3910260 |
| 1 | Coolant O-Ring Seal | 3910517, 3019114, 145580 |
| 1 | O-Ring Seal | 3926047 |
| 1 | O-Ring Seal | 3928624 |
| 1 | O-Ring Seal | 3929457 |
| 2 | Sealing Washers | 3963983, 3935171, 3918191, 3903037, 3283280 |
| 1 | O-Ring Seal | 3089240 |
| 1 | O-Ring Seal | 4890088 |
| 1 | Oil Seal | 4890832, 5338295, 3955214 |
| 1 | Oil Seal | 4890833 |
| 12 | O-Ring Seals | 4894095 |
| 1 | Oil Cooler Core Gasket | 4895742, 4896408, 3966601, 3955046 |
| 1 | Filter Head Gasket | 4896409 |
| 1 | Accessory Drive Cover Gasket | 4896897 |
| 1 | Oil Suction Connection Gasket | 4898301 |
| 1 | O-Ring Seal | 3330478 |
| 1 | O-Ring Seal | 4898372 |
| 1 | O-Ring Seal | 4898439 |
| 1 | O-Ring Seal | 4898876 |
| 4 | Piston Cooling Plugs | 3959574 |
| 1 | Oil Pan Gasket | 4939246, 4897877 |
| 1 | Seal Ring | 3533955 |
| 1 | O-Ring Seal | 3678603 |
| 2 | O-Ring Seals | 3678786 |
| 2 | O-Ring Seals | 3678912 |
| 1 | O-Ring Seal | 3678925, 4944960 |
| 1 | O-Ring Seal | 3679139 |
| 1 | Upper Gasket Set | 4089780, 4025107 |
| 4 | O-Ring Seals | 145530 |
| 2 | Turbocharger Hose O-Ring Seals | 3922794, 3883963 |
| 2 | O-Ring Seals, 3928624, | |
| 1 | Turbocharger Gasket | 3932475 |
| 1 | Thermostat O-Ring Seal | 3942454 |
| 4 | O-Ring Seals | 4890926 |
| 4 | O-Ring Seals | 4890929 |
| 1 | Turbocharger Oil Drain Gasket | 4891288 |
| 4 | Sealing Washers | 4893741 |
| 4 | Exhaust Manifold Gaskets | 2830444, 4896350 |
| 1 | Filler Cap Gasket | 4895461, 5255450 |
| 2 | Sealing Washers | 4895620 |
| 1 | Valve Cover Gasket | 4899228 |
| 1 | Rocker Lever Housing Gasket | 4899230 |
| 4 | Noise Isolators | 4899239 |
| 4 | Copper Plain Washers | 4899689 |
| 1 | Cylinder Head Gasket | 2830706, 4894688, 4898414, 4898853 |
| 1 | Cylinder Head Gasket | 2830707, 4894722, 4898415, 4898854 |
| 1 | Turbocharger O-Ring Seal | 3066211 |
| 2 | O-Ring Seals | 3865398 |
Specifications
| Brand | 4BTdiesel |
|---|---|
| Compatible Brand | For CUMMINS |
| Compatible Engine Brand | For CUMMINS |
| Engine Number | 4B 3.9L |
| Replacement Part Number | OH4025072-4B |
| Condition | New |
Shipping Spec
| Weight | 18.144 kg |
|---|---|
| Dimensions | 71.1 × 41.9 × 33.7 cm |
โ Replace Part Number: OH40250724B
โ Fit for: Cummins 4B 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.
