Fast delivery within 72 Hours

Cummins ISC 8.3L Inframe Engine Rebuild Kit, New (IF4089963)

โ€“ Replace Part Number: IF4089963
โ€“ Fit for: Cummins ISC 8.3L engines
โ€“ Built to OEM specs for a proper fit
โ€“ Send us an inquiry for price

Engine Serial Number (ESN) โ€” Have your engine serial number? Enter it here. We can use it to help review whether this part matches your engine.
SKU: P0265945
30-Day Money Back

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.

  • 30-Day Money Back
  • 2-7 Days Fast Delivery
  • 6 Months Warranty
  • 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.

  • Keep your dieselย running longer and increase efficiencyย by replacing the critical parts of your engine with a Inframe Rebuild kitย made to OEM specifications!
  • 4BTdiesel knows quality is a top priority. To ensure quality and consistency standards are met, your rebuild kit is manufactured and assembled in an ISO 9001:2008 certified facility.ย 
  • Drive comfortable knowingย fluids are being kept in place. High quality gasket sets made with correct materials are included to ensure excellent performance inย functionality and sealability.
  • Additionally, American made sealing products crafted with 100% asbestos-free materials are included. It doesn’t get better than that!
  • Have confidence in the tri-metal constructed rod and main bearings made for long lasting durability to keep you running till the cows come home.
  • Let’s talk pistons! With CNC turned bodies and forged articulated piston crowns, these pistons use computer controlled machining to keep proper clearances within your cylinders.
  • But that’s not all! Maximize the strength with piston pins tempered and hardened for wear resistance to keep you going another million miles!
  • Keep oil in it’s place with oil control rings designed with tangential tension to maintain your oil control.
  • Why sacrifice quality if you don’t have? All components of your rebuild kit are brand new with equal or better quality compared to the OE.ย 
  • The catch? There is none! Get all this at a lower price than the OE would charge and no core charges!

Kit Contents:

  • (1) Oil Pickup Tube Gasket
  • (6) Piston Kits
    • (12) Piston Pin Retainers
    • (6) Piston Ring Sets
      • (6) Oil Piston Rings
      • (6) Compression Piston Rings
      • (6) Compression Piston Rings
    • (6) Piston Pins
    • (6) Piston Skirts
    • (6) Piston Crowns
  • (1) Oil Pan Gasket
  • (6) Cylinder Liners
  • (6) Liner Seals
  • (1) Main Bearing Set
    • (7) Top Main Bearings
    • (6) Bottom Main Bearings
    • (1) Thrust Bearing
  • (6) Connecting Rod Bearings
  • (6) Connecting Rod Bearings
  • (1) Upper Engine Gasket Set
    • (1) Breather Mounting Seal
    • (1) Turbo Oil Drain Gasket
    • (1) Valve Cover Gasket
    • (5) Sealing Washers
    • (23) Sealing Washers
    • (1) Rocker Lever Housing Gasket
    • (1) Connection Gasket
    • (1) Intake Manifold Cover Gasket
    • (1) Connection Gasket
    • (2) O-Ring Seals
    • (3) O-Ring Seals
    • (2) O-Ring Seals
    • (6) O-Ring Seals
    • (1) Cylinder Head Gasket
    • (24) Valve Stem Seals
    • (1) Copper Gasket
    • (1) O-Ring Seal
    • (1) Turbocharger Gasket
    • (1) Turbo Hose O-Ring Seal
    • (1) O-Ring Seal
    • (6) Injector Seals
    • (6) Exhaust Manifold Gaskets
    • (6) O-Ring Seals

Warranty

6-month warranty.

What Rebuild Kit and Gasket Set Includes

Qty Component Part Number
1 Oil Pickup Tube Gasket 3939352, CUM3914302, 3914302, 3906202
6 Piston Kits 4089963
12 Piston Pin Retainers 3920692
6 Piston Ring Sets 4089644
6 Oil Piston Rings 3921919
6 Compression Piston Rings 3948412
6 Compression Piston Rings 3964073
6 Piston Pins 3950549
6 Piston Skirts 3966721, CUM3966721
6 Piston Crowns 4941393
1 Oil Pan Gasket 3938160, CUM3914017, 3934044, 3914017, 3911818, 3906611
6 Cylinder Liners 3800328, 3944344, 3948095
6 Liner Seals 3907177, 3917737
1 Main Bearing Set 3945917, 3802210, 3802140, 3800270
7 Top Main Bearings 3944153
6 Bottom Main Bearings 3944158
1 Thrust Bearing 3944163
6 Connecting Rod Bearings 3950661, 3901460, 3901430, CUM3901430
6 Connecting Rod Bearings 3966244
1 Upper Engine Gasket Set 4089978
1 Breather Mounting Seal 3073966
1 Turbo Oil Drain Gasket 3282113, 3285747, 3819378, 3914388, 3928919, 3931350, 3937706, 3942725, 5264569
1 Valve Cover Gasket 3959798
5 Sealing Washers 3935172, 3937155, 3963988
23 Sealing Washers 3957427, 3963990
1 Rocker Lever Housing Gasket 3966708, 5272959
1 Connection Gasket 3967891
1 Intake Manifold Cover Gasket 3970134
1 Connection Gasket 3975487
2 O-Ring Seals 3678603
3 O-Ring Seals 3330202, 4010519
2 O-Ring Seals 4010643
6 O-Ring Seals 3947540, 3972753, 4062328
1 Cylinder Head Gasket 3967059, 4981796
24 Valve Stem Seals 3943888, 3943889, 3948578, 3991267
1 Copper Gasket 3900216, 3920773
1 O-Ring Seal 145533, 3973512, 3990084
1 Turbocharger Gasket 3905033, 3916300, 3921926
1 Turbo Hose O-Ring Seal 3883963, 3922794
1 O-Ring Seal 3931824
6 Injector Seals 3937142
6 Exhaust Manifold Gaskets 3937479, 3943191, 5269779
6 O-Ring Seals 4890926
Brand4BTdiesel
Compatible BrandFor CUMMINS
Compatible Engine BrandFor CUMMINS
ConditionNew

Shipping Spec

Weight49.895 kg
Dimensions71.1 × 41.9 × 33.7 cm

โ€“ Replace Part Number: IF4089963
โ€“ Fit for: Cummins ISC 8.3L engines
โ€“ Built to OEM specs for a proper fit
โ€“ Send us an inquiry for price

Need Help?

Speak to a parts specialists now

Need Help Form Single Product

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.