Fast delivery within 72 Hours
Cummins 4B 3.9L, 6B 5.9L, 4B 4.5L Inframe Engine Rebuild Kit, New (OH4089977RGT)
โ Replace Part Number: OH4089977RGT
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 aย 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’ll receive aย brand new rebuild kitย that goes through a strict manufacturing and assembling process in anย ISO 9001:2008 certified facility.ย This ensures greatย quality and consistency.
- If you want toย extend the lifeย and bring your engine toย good working condition,ย this is the rebuild kit for you. Plus, you’ll get rod and main bearings composed of aย tri-metal materialย to ensureย long lasting strength and durability.
- Think you’re tough? These piston pins sure are. They areย hardened and temperedย forย improved strength and wear resistance.ย Extreme conditions? Not a problem for these bad boys.ย
- Let’s talk sealing products. The products you will get areย proudly USA madeย and useย 100% Asbestos-Free Material.ย If that doesn’t get you salivating, theย correct materialsย are used forย maximum sealing performance.
- It is important to keep your engine well lubricated, but who would want leakage? The oil control rings included areย designed with precise tangential tension for proper oil control.ย You can’t beat that!
- Are clearances and tolerances on your list? They should be. The pistons included areย CNC turned to precise tolerancesย andย computer control machinedย toย maintain proper clearances.ย
- Adding onto that,pistonsutilizeย complex combustion bowl geometryย forย unrelenting power and efficiency.ย
- Rebuilding an engine is a lengthy process. The time spent installing this rebuild kit will beย reducedย becauseย kit components are packed in subassemblies by function.ย Also, the parts willย fit and function properlyย due toย strict OE specifications being met.
- Want to save some money?ย We’ve got you covered.Qualityย meets or exceeds the OE’s at a fraction of the cost.ย To top it off,ย all new partsย are included and there isย no core charge.That’s more bang for your buck!
Kit Contents
- (1) Main Bearing
- (6) Connecting Rod Bearings
- (6) 1.00mm Piston Kits
- (12) Piston Pin Retainers
- (6) Piston Pins
- (6) 1.00mm Engine Pistons
- (6) 1.00mm Piston Ring Sets
- (6) Top Piston Rings
- (6) 1.00mm Second Piston Rings
- (6) 1.00mm Oil Rings
- (6) Connecting Rod Bearings
- (1) Upper Gasket Set
- (1) Rocker Cover Housing Gasket
- (4) Lock Plates
- (1) Oil Drain Gasket
- (2) O-Ring Seals
- (1) Turbo Hose O-Ring Seal
- (1) O-Ring Seal
- (1) Rocker Cover Gasket
- (1) Seal
- (6) O-Ring Seals
- (6) Exhaust Manifold Gaskets
- (3) Sealing Washers
- (21) Seaing Washers
- (1) Exhaust Rcn Valve
- (4) Connection Gaskets
- (1) Rectangular Seal
- (1) Turbocharger O-Ring Seal
- (10) Sealing Washers
- (4) Sealing Washers
- (2) O-Ring Seals
- (4) Sealing Washers
- (1) Intake Manifold Gasket
- (1) Thermostat Seal
- (1) Copper Gasket
- (1) Accessory Drive Cover Gasket
- (1) O-Ring Seal
- (1) O-Ring Seal
- (2) O-Ring Seals
- (6) O-Ring Seals
- (1) Cylinder Head Gasket
- (1) O-Ring Seal
- (1) O-Ring Seal
- (6) Mid Range XPI Injector Seals
- (6) O-Ring Seals
- (1) Turbocharger Gasket
- (1) Lower Gasket Set
- (1) O-Ring Coolant Seal
- (1) Rectangular Ring Seal
- (1) O-Ring Plug
- (1) Seal
- (6) Cooling Nozzles
- (1) O-Ring Seal
- (1) Oil Seal
- (2) O-Ring Seals
- (1) Sealing Washer
- (1) Flange Gasket
- (1) Oil Pan Gasket
- (1) Threaded Plug
- (2) O-Ring Seals
- (1) O-Ring Seal
- (1) Oil Seal
- (1) Accessory Drive Cover Gasket
- (6) Piston Cooling Plugs
- (2) O-Ring Seals
- (21) Sealing Washers
- (4) Sealing Washers
- (1) Rectangular Seal
- (1) O-Ring Seal
- (1) Copper Gasket
- (2) O-Ring Seals
- (1) O-Ring Seal
- (1) O-Ring Seal
Warranty
6-month warranty.
What Rebuild Kit and Gasket Set Includes
| Qty | Component | Part Number |
|---|---|---|
| 1 | Main Bearing | 3802070, 3800290, 861260, 4955853 |
| 6 | Connecting Rod Bearings | 3969562, CUM3901170, 3939859, 3901230, 3901170 |
| 6 | 1.00mm Piston Kits | 4089977, 4089184 |
| 12 | Piston Pin Retainers | 3920691, 3901706, 3284366, CUM3901706 |
| 6 | Piston Pins | 3934047, 3919053, CUM3934047 |
| 6 | 1.00mm Engine Pistons | 3966676 |
| 6 | 1.00mm Piston Ring Sets | 4089182, 3949580 |
| 6 | Top Piston Rings | 3927245 |
| 6 | 1.00mm Second Piston Rings | 3943546 |
| 6 | 1.00mm Oil Rings | 3933586 |
| 6 | Connecting Rod Bearings | 4893693 |
| 1 | Upper Gasket Set | 4089263OS |
| 1 | Rocker Cover Housing Gasket | 3963379, 3955109 |
| 4 | Lock Plates | 4933628, 3990120, 3937704 |
| 1 | Oil Drain Gasket | 4931365, 3949499, 5264568 |
| 2 | O-Ring Seals | 3928624 |
| 1 | Turbo Hose O-Ring Seal | 3922794, 3883963 |
| 1 | O-Ring Seal | 3678603 |
| 1 | Rocker Cover Gasket | 3954324 |
| 1 | Seal | 3906698, CUM3906698 |
| 6 | O-Ring Seals | 3087740 |
| 6 | Exhaust Manifold Gaskets | 5266422, 5447591, 3955339 |
| 3 | Sealing Washers | 3963988, 3937155, 3935172 |
| 21 | Seaing Washers | 3963983, 3935171, 3918191, 3903037, 3283280 |
| 1 | Exhaust Rcn Valve | 3949417 |
| 4 | Connection Gaskets | 3949910 |
| 1 | Rectangular Seal | 3949916 |
| 1 | Turbocharger O-Ring Seal | 3066211 |
| 10 | Sealing Washers | 4934278, 3963989, 3947872 |
| 4 | Sealing Washers | 4934279, 3963992, 3957769 |
| 2 | O-Ring Seals | 3958414 |
| 4 | Sealing Washers | 3963981, 3935168 |
| 1 | Intake Manifold Gasket | 3947530 |
| 1 | Thermostat Seal | 3954829 |
| 1 | Copper Gasket | 3920773, 3900216 |
| 1 | Accessory Drive Cover Gasket | 3955457 |
| 1 | O-Ring Seal | 4010519, 3330202 |
| 1 | O-Ring Seal | 3883284, CUM3883284 |
| 2 | O-Ring Seals | 3957131 |
| 6 | O-Ring Seals | 4890926 |
| 1 | Cylinder Head Gasket | 3966342 |
| 1 | O-Ring Seal | 3966343 |
| 1 | O-Ring Seal | 3973512, 3990084, 145533 |
| 6 | Mid Range XPI Injector Seals | 3937142 |
| 6 | O-Ring Seals | 4062328, 3972753, 3947540 |
| 1 | Turbocharger Gasket | 3949530 |
| 1 | Lower Gasket Set | 4089264 |
| 1 | O-Ring Coolant Seal | 3910517, 3019114, 145580 |
| 1 | Rectangular Ring Seal | 3906697, CUM3906697, 3901467 |
| 1 | O-Ring Plug | 3910248, 3904470, 3903450 |
| 6 | Cooling Nozzles | 3937214, 3930139, 3919002, CUM3937214 |
| 1 | Oil Seal | 4890832, 5338295, 3955214 |
| 2 | O-Ring Seals | 3946188 |
| 1 | Sealing Washer | 3963988, 3937155, 3935172 |
| 1 | Flange Gasket | 3949562 |
| 1 | Oil Pan Gasket | 3959797, 3955106, 4337596 |
| 1 | Threaded Plug | 3924147, CUM3924147 |
| 2 | O-Ring Seals | 4010643 |
| 1 | Oil Seal | 4890833 |
| 6 | Piston Cooling Plugs | 3959574 |
| 21 | Sealing Washers | 3963983, 3935171, 3918191, 3903037, 3283280 |
| 4 | Sealing Washers | 3963981, 3963981 |
| 1 | Rectangular Seal | 3965385 |
| 1 | O-Ring Seal | 3929457 |
| 2 | O-Ring Seals | 3089240 |
| 1 | O-Ring Seal | 3679139 |
| 1 | O-Ring Seal | 3678786 |
| 1 | O-Ring Seal | 3910260 |
| 1 | Oil Cooler Core Gasket | 2830559 |
| 1 | Filter Head Gasket | 3974127 |
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: OH4089977RGT
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.
