3800487 | Cummins B/ISB/QSB Lower Engine Gasket Set, New

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3800487 | Cummins B/ISB/QSB 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-3800487 — Gasket Set - Lower Engine
Line No Kit Item No Item Name Qty UOM
1 M-3906698 Seal 1 EA
2 M-3920773 Gasket 1 EA
3 M-3928759 Seal - Grommet 8 EA
4 M-3929457 Seal - O-ring 1 EA
5 M-3929792 Gasket - Filter Head 1 EA
6 M-4089342 Kit - Rear Crankshaft Seal 1 EA
7 M-3935032 Seal 1 EA
8 M-3937214 Nozzle - Cooling 6 EA
9 M-3938156 Gasket - Gear Housing 1 EA
10 M-3938157 Gasket 1 EA
11 M-4947667 Gasket - Cover - Rear 1 EA
12 M-3284623 Gasket - Push Rod Cover 1 EA
13 M-3942915 Gasket - Filter Head 1 EA
14 M-3089240 Seal - O-ring 1 EA
15 M-3330202 Seal - O-ring 2 EA
16 M-3330478 Seal - O-ring 2 EA
17 M-3678912 Seal - O-ring 1 EA
18 M-3678925 Seal - O-ring 5 EA
19 M-3938706 Gasket - Cover Plate 1 EA
20 M-3959052 Gasket - Oil Pan 1 EA
21 M-4932124 Gasket - Oil Cooler Core 1 EA
22 LABEL NUMBER 1 2 EA
23 M-3937111 Seal - Front Crankshaft 1 EA
24 CG65PR 1 EA
25 M-3902425 Washer - Sealing 2 EA
26 M-3903475 Seal - Rectangular Ring 1 EA
27 M-3906697 Seal - Rectangular Ring 1 EA
28 M-3910260 Seal - O-ring 1 EA
29 M-3912473 Seal - Rectangular - Rear 1 EA
30 LABEL 4X12 1 EA
31 M-3008400 Gasket 1 EA
32 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.

  • 3800487

We offer free shipping on orders $250 and above! For orders under $250, standard shipping rates apply. If you need expedited shipping such as Next Day Air or 2nd Day Air, just give us a call and one of our sales representatives will help you get the order placed within the timeline you need!

2 year warranty applies!

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Buy Now, Pay Later

Interest-Free Up To 12M

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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