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MCB343071 (Gasket Kit - Major Overhaul)

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Regular price $1,720.39
Sale price $1,720.39 Regular price $1,810.94
Shipping calculated at checkout.

Additional Info: Shipping | Returns & Refund | Warranty

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Caterpillar® | D343/D346/D348/D349

High quality gaskets are crucial for ensuring a reliable seal between engine components and should be replaced regularly to prevent leaks and maintain optimal performance. These high-quality sets ship complete with all the necessary gaskets for your rebuild or repair and are backed by our comprehensive warranty.
Backed by world-class engineering, These replacement parts are produced for applications in the D343/D346/D348/D349 family of engines. Industry uses include construction, mining, and marine. These engines are known for reliability and high-output across various equipment in challengine environments.

Product Image Notice: For representation purposes only. Component colors or exact packaging layouts may vary while maintaining identical OEM fitment.



Specifications

Part Number

MCB343071 (Gasket Kit - Major Overhaul)

Vendor

Interstate-McBee® (Aftermarket)

Condition

New

OEM Brand Fitment

Caterpillar®

Engine Model

D343/D346/D348/D349

Shipping Dimensions

Length (in)

50.0

Width (in)

17.5

Height (in)

3.5

Weight (lb)

14.71

Notes

Dimensions shown are for shipping and packaging purposes only. Actual product dimensions may vary.

Processing & Delivery Timeline

Processing Time

1–3 Business Days

Shipping Transit Time

1–5 Business Days

Total Estimated Delivery

2–8 Business Days

Shipping Policy

Click Here

Warranty

Warranty

2 Year

Warranty Policy

Click Here

Kit Contents

Part # Description Qty
M-6H1871 O-Ring Seal 6
M-1M556 O-Ring Seal 1
M-6F6673 O-Ring Seal 1
M-8S8874 Lock Nut 1
M-1M9711 Gasket 1
M-3H4119 Lock Nut 1
M-3P69 Gasket 1
M-4M8303 O-Ring Seal 2
M-5M9728 Lock 1
M-7M7667 Gasket 1
M-7S3256 Gasket 1
M-9S712 Lock 1
M-2S795 Gasket 2
M-9S4128 Gasket 1
M-9N3281 Gasket 1
M-9S723 Lock 1
M-2M4453 O-Ring Seal 1
M-5F3106 Nitrile 75-126.59 x 3.53 1
M-6F4868 Oil Pan Washer 1
M-4M1832 Gasket 3
M-5M1902 Gasket 1
M-8M5249 O-Ring Seal 1
M-5M9419 Gasket 1
M-5S3903 Rear Crankshaft Seal 1
M-7M4844 Gasket 1
M-7S3247 Gasket 1
M-7M7205 Lock 6
M-8M7587 Lock Nut 3
M-0L1250 Lock 1
M-9M909 Lock - Nut 1
M-5M1868 O-Ring Seal 6
M-8M5661 O-Ring Seal 1
M-5L8854 Seal Ring 2
M-5M2667 Gasket 6
M-9S3034 Gasket 1
M-9S5746 Water Director Seal Ferrule 24
M-1P6857 Gasket 1
M-2M5173 Turbocharger Flange Seal 4
M-3S9686 Cylinder Head Gasket 1
M-2M6203 Gasket 6
M-1S7658 Lock 1
M-2M8089 Gasket 1
M-1M9745 Gasket 1
M-1S6595 Turbocharger Oil Supply Gasket 1
M-4M8210 Lock 2
M-1H9027 Gasket 1
M-2H5001 Seal Ring 1
M-5M9421 Gasket 1
M-3S5496 O-Ring Seal 2
M-3S7781 Transfer Case Gasket 1
M-7S3206 O-Ring Seal 6
M-6B831 Gasket 1
M-7M7224 Gasket 1
M-7M7226 Gasket 1
M-7M7273 Turbocharger Gasket 1
M-8M904 Oil Lines Group Gasket 1
M-4F9653 Cover Group Seal 6
M-8S9988 Head Gasket Shim 1
M-8M5266 O-Ring Seal 1
M-4L8337 Air Compressor O-Ring Seal 2
M-9S5747 Seal 24
M-2M574 Gasket 2
M-9M2678 Gasket 1
M-9M5376 Gasket 1
M-0T225 Gasket 1
M-1H8171 Hydraulic Seal 1
M-1S9546 Gasket 1
M-2P8234 Seal 1
M-2P8643 Gasket 1
M-2S7472 Gasket 1
M-3P150 Gasket 1
M-4F7391 Hydraulic Seal 1
M-2P2773 Gasket 1
M-4J2506 O-Ring Seal 1
M-4S7756 Seal 2
M-5L8991 Cover Gasket 1
M-5P9294 Lip Type Seal 1
M-6L5766 Gasket 1
M-6L5773 Fuel Pump Gasket 1
M-6V8977 Fuel Transfer Pump Seal 1
M-7S2374 Gasket 1
M-8D5372 Gasket 1
M-8M4389 O-Ring Seal 1
M-5P4889 O-Ring Seal 1
M-8M5254 O-Ring Seal 1
M-8S5575 Seal 1
M-8S6157 Gasket 1
M-9S8016 Gasket 1
M-4N3841 Oil Cooler Gasket 1
M-4N7526 Seal 1
M-7F2122 O-Ring Seal 1
M-2S3966 Ring 1
M-3S3535 Seal 1
M-5M9737 Oil Seal 1
M-6F9163 Oil Filter Washer 5
M-7M4196 Gasket 1
M-9M2414 Gasket 1
M-1A6879 Gasket 1
M-2J8163 O-Ring Seal 1
M-8S5011 O-Ring Seal 1
M-8S5093 Gasket 1
M-9M6542 Oil Lines Group Gasket 1
M-9S1269 Gasket 1
M-7C9710 Gasket 1
M-3J7354 O-Ring Seal 24
M-8S4187 Air Lines Group Gasket 2
M-8F6647 Gasket 1
M-8C3100 Water Pump Seal 1
M-8M7065 Air Comp Gasket 2
M-9F5940 Gasket 3
M-5M3535 Gasket 1
M-5M9416 Gasket 1
M-3H4970 Accessory Drive Seal 2
M-5M9420 Gasket 1
M-2A5328 Lock 2
M-8M4991 O-Ring Seal 4
M-8M5521 Shutoff Gasket 1
M-2H3848 Oil Seal 1
M-8S5002 Gasket 3
M-2H6184 Hydraulic Seal 1
M-2J157 O-Ring Seal 2
M-2S6151 Gasket 1
M-5K227 O-Ring Seal 1
M-5M9735 Arm Assembly Seal 1
M-8H9180 Lip Type Seal 1
M-2S1509 Front Crankshaft Seal 1
M-5M4060 Lock 1
M-9S746 Gasket 1
M-3S9643 Thermostat Seal 2
M-8S6021 Gasket 1
M-7M8144 Gasket 2
M-7M8151 Gasket 1
M-7M8227 Gasket 2
M-1S7107 Gasket 1
M-2H3931 O-Ring Seal 1
M-2S1218 Gasket 1
M-2S4080 Gasket 1
M-3H7311 Gasket 1
M-6L1883 Governor Gasket 1
M-1A2024 Gasket 1
M-2B1738 Screw Lock 5
M-1H7339 O-Ring Seal 1
M-1M7390 Lock 1
M-1S777 Lock 1
M-2F4159 Lock 1
M-2H3504 Lock 1
M-3D2992 O-Ring Seal 6
M-3H3385 Hydraulic Seal 3
M-3H5175 Air Comp Gasket 1
M-4H7869 Starter Gasket 1
M-4J519 O-Ring Seal 1
M-9M9647 O-Ring Seal 4
M-4M2920 Gasket 1
M-5P8210 O-Ring Seal 1
M-7M969 Lock Washer 1
M-8M8997 O-Ring Seal 1
M-8S7093 Gasket 1
M-1M6724 Oil Pan Gasket 1
M-1M6831 Lock Nut 3
M-4F3956 Gasket 2
M-2M9189 Oil Change Group Gasket 1
M-1S2616 Gasket 1
M-2M9222 Gasket 2
M-4M78 Plate Oil Pan Gasket 1
M-4M4460 Gasket 2
M-8F8682 Screw Lock 2
M-8F8683 Screw Lock 1
M-9F7177 Gasket 1
M-0L364 Lock 55
M-9M3210 Side Cover Gasket 1
M-1P2278 Ring 1
M-4H5952 Gasket 1
M-2A1162 Fuel Filter Gasket 1
M-2P8697 Governor Gasket 1
M-2P8763 Gasket 1
M-2S5205 Gasket 1
M-5P5641 Seal - Stock 2
M-5S4279 Gasket 1
M-6H1995 O-Ring Seal 4
M-9M6292 Lock 1
M-9M6293 Lock 1
M-9S2589 Gasket 2
M-5H3703 Washer 2
M-2A5328 Lock 1
M-1S7876 Lock Nut 2
M-5H2767 O-Ring Seal 1
M-5H8848 O-Ring Seal 1
M-8H2778 Fuel Filter Gasket 1
M-4J5268 Hydraulic Seal 2
M-7L2894 Gasket 3
M-1S7390 Hydraulic Seal 1
M-2A4448 Gasket 1
M-2M4071 Gasket 1
CG73PR Product Box 1
CG73PAD Pad 1
M-1757904 O-Ring Seal 1
CG72PAD Pad 1

Disclaimer: Limitless Contracting LLC is an independent supplier of premium aftermarket replacement engine parts. All manufacturer names, numbers, symbols, and descriptions (including Caterpillar, Cummins, Detroit Diesel, etc.) are registered trademarks of their respective owners. Their use on this website is strictly for identification and cross-reference compatibility purposes only. Limitless Contracting LLC is not affiliated with, endorsed by, or sponsored by any OEM trademark holders.

MCB343071 (Gasket Kit - Major Overhaul)

$1,720.39


How Do I Make Sure the Part Fits My Engine?

We strongly recommend providing your Engine Serial Number (ESN) or VIN before placing an order. Diesel engine components can vary by engine model, CPL, and production year — even when part numbers look similar.

At Limitless Contracting, we verify compatibility whenever an ESN or VIN is provided to help ensure you receive the correct part the first time.

To avoid delays or incorrect orders:

  • Enter your ESN or VIN on the product page (if required)
  • Or contact our team for verification before purchasing
  • If you're unsure, we’re happy to assist you

Our goal is to eliminate guesswork and keep your equipment running with minimal downtime.

What Is Your Return Policy?

Limitless Contracting offers a structured return policy designed specifically for diesel engine components and heavy-duty parts.

Eligible items may be returned within 30 days of the invoice date, provided they are:

  • Unused and uninstalled
  • In original packaging
  • In resalable condition
  • Accompanied by an approved RMA number

Certain items such as electrical components, gaskets, open kits, special-order items, and installed parts are non-returnable.

Approved returns are subject to a 15% restocking fee, and shipping charges are non-refundable.

For full details — including core returns, freight claims, refund timelines, and international return guidelines — please review our complete:

👉 Returns & Refund Policy

All returns require prior authorization. Unauthorized returns will not be accepted.

How Safe Are Online Transactions with Limitless Contracting?

At Limitless Contracting, your security is our top priority. All transactions on our website are protected using SSL (Secure Socket Layer) encryption, which ensures your personal and payment information is securely transmitted and fully encrypted.

We use industry-standard 256-bit encryption, the same level of protection trusted by major financial institutions.

In addition:

  • All payments are processed through PCI-compliant secure payment gateways
  • Your credit card information is never stored on our servers
  • Advanced fraud prevention systems help monitor and protect every transaction

We are committed to providing a safe, secure, and reliable purchasing experience.

If you prefer to place your order directly with a representative, you are always welcome to contact us — we’ll be happy to assist you.

Do You Offer Warranties On Your Products?

Yes. Most engine parts sold by Limitless Contracting are backed by warranty coverage under our Limited Warranty Policy.

Warranty coverage varies by product category and may include:

  • New Engine Components: Up to 24 months from installation
  • Cylinder Heads & Valve Train Components: 12 months from installation
  • Fuel Injector Assemblies: 12 months from installation
  • Remanufactured products may also qualify for coverage

Warranty terms apply to defects in material and workmanship under normal use and service.

Please note:

  • Warranty coverage applies only to the original purchaser
  • Coverage does not extend beyond 36 months from the invoice date
  • Installation must follow OEM guidelines
  • Claims require proper documentation and return authorization
  • Third-party products are subject to the original manufacturer’s warranty terms

Because diesel engine components operate under demanding conditions, warranty eligibility depends on proper installation, maintenance, and diagnostic verification.

For complete details — including exclusions, claim procedures, labor reimbursement limits, and manufacturer-backed components — please review our full:

👉 Warranty Policy

All warranty claims require prior authorization. Core return labels must not be used for warranty claims.

Are Your Parts OEM or Aftermarket?

Limitless Contracting specializes in high-quality aftermarket engine components.

We do not market or represent our products as OEM. Instead, we supply premium aftermarket parts sourced exclusively from certified manufacturers that meet strict quality and production standards.

Our suppliers maintain recognized industry certifications such as:

  • ISO 9001 Quality Management Systems
  • AAR / Industry-Specific Certifications (where applicable)
  • Structured Quality Assurance Programs
  • Controlled Manufacturing & Inspection Standards

All components are manufactured to meet or exceed OEM performance specifications for durability, fitment, and reliability.

We focus on delivering:

  • Reliable performance
  • Cost-effective solutions
  • Consistent quality control
  • Dependable supply chain stability

If you require technical specifications, material standards, or certification documentation for a specific product, our team will be happy to assist.

Can I Change or Cancel My Order?

We begin processing orders quickly to minimize downtime for our customers. If you need to change or cancel your order, please contact us as soon as possible.

Order Changes or Cancellations May Be Possible If:

  • The order has not yet shipped
  • The item has not entered freight processing
  • The product is not a special-order or custom-built item

Once an order has shipped, it cannot be canceled. In such cases, the order may fall under our standard return policy, including applicable restocking fees and return shipping costs.

Please note:

  • Special-order and custom items cannot be canceled once processing begins
  • Freight shipments may incur cancellation fees once dispatched
  • Refund timelines follow our Shipping, Returns & Refund Policy

If you need assistance, contact our team immediately with your order number so we can review the status and advise on available options.

Do you offer free shipping or price matching?

Free shipping may be available on select products or qualifying orders once a minimum order value is met. When applicable, this will typically be indicated on the product page or in promotional notices throughout the website.

If you have any questions regarding shipping eligibility, please feel free to contact our team.

We strive to keep our pricing fair, competitive, and transparent. While we do our best to offer strong value, we are happy to review reasonable price-match requests when possible. Please note that this typically excludes pricing errors, limited-time promotions, liquidation sales, auction listings, or pricing from membership-based marketplaces. If you believe you have found a comparable offer, we encourage you to reach out and our team will gladly review it.

Where are you based and where do your orders ship from?

Limitless Contracting LLC is headquartered in the greater Atlanta area in Lawrenceville, Georgia, USA.

Orders may ship from our inventory, supplier warehouses, or distribution partners depending on product availability and destination to ensure efficient and reliable delivery.

When will my order ship and how long will delivery take?

Most orders are processed and shipped within 1–2 business days, depending on product availability and order requirements. Our team works to process and dispatch orders as efficiently as possible; however, fulfillment time may vary based on factors such as order volume, product availability, and any special handling, assembly, or packaging requirements. Orders placed after business hours, on weekends, or on holidays will be processed on the next available business day.

For expedited shipping, the selected shipping service determines the delivery speed once the order has shipped. Please note that selecting expedited shipping does not guarantee immediate shipment, as order processing may still depend on product availability and preparation requirements. If your order is time-sensitive, we recommend contacting our team prior to placing the order so we can assist.

Once shipped, typical transit times are as follows:

  • Ground Shipping: Usually 1–4 business days within the United States, depending on the destination and distance from the shipping origin.
  • Freight Shipping: Typically 1–5 business days, depending on the destination, carrier routing, and delivery scheduling requirements.
  • Expedited Shipping: Delivery time is determined by the specific service selected and the carrier’s terms and conditions.

Please note that transit times are estimates and may vary depending on carrier schedules, weather conditions, and destination accessibility. If you have questions regarding product availability, shipping timelines, or delivery options, our team will be happy to assist.

How can I track my order?

Once your order ships, you will receive a shipping confirmation email containing your tracking number and carrier information.

You can use this tracking number to monitor your shipment directly through the carrier’s website.

Tracking details are typically provided:

  • Within 24 hours of shipment
  • As soon as the carrier scans the package
  • Via the email address used at checkout

For freight (LTL) shipments, tracking may include:

  • Carrier name
  • PRO number
  • Delivery appointment coordination (if required)

If you created an account during checkout, you may also log in to view your order status and shipment details.

If you have not received tracking information or need assistance locating your shipment, please contact our team with your order number and we will be happy to assist.

Do you ship internationally?

Yes. Limitless Contracting ships worldwide.

We regularly supply diesel engine parts to customers across North America, the Middle East, Africa, Latin America, and beyond. Whether you need a single component or a complete engine overhaul kit, we can coordinate secure international delivery.

We offer:

  • Air freight for urgent orders
  • Ocean freight for larger or bulk shipments
  • Express courier services for small parcels
  • Commercial invoicing and export documentation support

Shipping costs and transit times vary depending on destination, package size, and urgency. Our team works with trusted global logistics partners to ensure your order arrives safely and efficiently.

If you have a preferred freight forwarder, we can also coordinate directly with them.

For a shipping quote or lead time estimate, simply contact our team with your part list and delivery address.

Will you ship via the U.S. Postal Service (USPS)?

No. Limitless Contracting does not ship orders via the U.S. Postal Service.

Due to the size, weight, and value of diesel engine components, we ship exclusively through reputable national carriers and freight providers, including parcel carriers and LTL freight services.

This allows us to ensure:

  • Reliable tracking
  • Proper handling of heavy or oversized items
  • Freight insurance and claims support
  • Delivery appointment coordination for large shipments

Carrier selection is based on package size, destination, and delivery requirements.

If you have a preferred carrier or freight forwarder, please contact us prior to placing your order and we will review available options.

Can I place an order by phone? How can I contact Limitless Contracting with questions?

Yes. Our team is available to assist with orders and product inquiries. Customers may place orders directly through our website, by email, or by phone, depending on what is most convenient.

If you need help selecting the correct part, confirming availability, or discussing an order, you are welcome to contact our team and we will be happy to assist.

You can reach us by:

  • Phone: (470) 608-3818
  • Email: info@limitless-llc.us
  • Online Contact Form: Available on our Contact Us page

Our regular business hours are Monday through Friday, 8:00 AM to 6:00 PM (EST). Messages submitted outside of business hours will be reviewed and responded to on the next business day.