4089979 | Cummins C/ISC/QSC/ISL/QSL Lower Engine Gasket Set, New

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4089979 | Cummins C/ISC/QSC/ISL/QSL Lower Engine Gasket Set, New

Product Overview
This heavy-duty replacement component is engineered to meet or exceed OEM specifications for reliable performance and long service life in demanding diesel engine applications. Each unit is manufactured with strict quality control standards to help ensure proper fitment and durability in professional diesel engine rebuild environments.

Kit Contents

Kit: M-4089979 — Gasket Set - Lower Engine
Line No Kit Item No Item Name Qty UOM
1 M-3073966 Seal - Breather Mounting 1 EA
2 M-3926048 Seal - O-ring 1 EA
3 M-3929011 Gasket - Oil Cooler Cover 1 EA
4 M-3930911 Seal - O-ring 1 EA
5 M-3938160 Gasket - Oil Pan 1 EA
6 M-3938655 Gasket - Acc Drive Cover 1 EA
7 M-3939352 Gasket - Oil Pickup Tube 1 EA
8 M-3939353 Gasket - FlyW Hsg Cover - Rear 1 EA
9 M-3940386 Seal - Water Pump 1 EA
10 M-3945603 Gasket - Water Inlet Conn 1 EA
11 M-3963988 Washer - Sealing 3 EA
12 M-3201562 Seal - O-ring 1 EA
13 M-3963990 Washer - Sealing 13 EA
14 M-4010519 Seal - O-ring 4 EA
15 M-4010643 Seal - O-ring 2 EA
16 M-4024883 Kit - Crankshaft Seal - Front 1 EA
17 M-4089342 Kit - Rear Crankshaft Seal 1 EA
18 M-4902952 Gasket - Fuel Pump 1 EA
19 CG65PR 1 EA
20 LABEL NUMBER 1 2 EA
21 M-3678925 Seal - O-ring 1 EA
22 M-3899283 Seal - O-ring 1 EA
24 M-3910260 Seal - O-ring 1 EA
25 M-3918174 Gasket - Oil Cooler Core 1 EA
26 M-3920773 Gasket 1 EA
27 M-3924148 Plug - Threaded 1 EA
28 M-3944293 Gasket - Gear Housing 1 EA
29 LABEL 4X12 1 EA
30 CG65PAD 2 EA

Key Features

  • OE-style fitment for proper installation
  • Durable construction for demanding operating conditions
  • Engineered for dependable heavy-duty diesel performance

About Interstate-McBee
Interstate-McBee is a trusted manufacturer of premium aftermarket diesel engine components. Products are manufactured under ISO 9001:2015 quality management standards and are engineered to meet or exceed OEM specifications. With decades of experience supporting the diesel and gas engine industries, Interstate-McBee components are designed to deliver consistent quality, reliability, and performance for heavy-duty engine applications.

Any mention of OEM names or OEM product ID numbers/descriptions/model numbers is intended for identification purposes only and does not indicate that it is an OEM part.

  • 4089979

Free Standard ground shipping within the Continental US! If you need your parts in a hurry and would like to get them overnighted or expedited please give us a call and our sales reps will let you know what options are available!

2 year warranty applies!

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Buy Now, Pay Later

Interest-Free Up To 12M

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Above The Line

Customer Service Guaranteed

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Free Ground Shipping

On All Orders!

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Premium Quality Parts

Manufacturing Since 1973

offer

Buy Now, Pay Later

Interest-Free Up To 12M

offer

Above The Line

Customer Service Guaranteed

offer

Free Ground Shipping

On All Orders!

offer

Premium Quality Parts

Manufacturing Since 1973