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Thermostat Seal for Caterpillar 4L8098

Thermostat Seal for Caterpillar 4L8098

See if this fits your application
SKU: H3S9643
Low Stock (3)
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Condition: New Aftermarket
Cross-References: 3S9643, 3S9643-F, 4L8098, FP-3S9643, FP3S9643, H3S9643, M-3S9643
The RF Engine Advantage
Family Operated Since 1975

Original Equipment Quality

Parts that meet or exceed OEM specifications. Guaranteed performance you can trust. Reliability built into every component.

100+ Years of Expertise

A century of collective diesel knowledge and 10+ acres of engines and engine parts, we are more than just an online reseller or call center. We know heavy-duty diesel.

Here for the Long Haul

Same location and same phone number for the last 50 years. Same commitment to getting you the right parts at the right price.

New, Reman, & Used

RF Engine offers an expansive offering of new aftermarket, remanufactured, and used engines and engine parts all under one roof.

Details

New aftermarket thermostat seal.


Our aftermarket replacement parts are built to OEM-equivalent standards. They have been produced to meet or exceed original equipment specifications for material quality, dimensional tolerance, and field durability — the same rigors the factory part is designed to handle. The result is a component that installs like factory, performs like factory, and delivers long service life without the dealer price tag.

Fitment Guide

Cold Planers (1)
Caterpillar PM465 (5ZS S/N Prefix)
Excavators (2)
Caterpillar 5080 (6XK S/N Prefix)
Caterpillar 5080 (8SL S/N Prefix)
Hydraulic Excavators (18)
Caterpillar 245 (82X S/N Prefix)
Caterpillar 245 (84X S/N Prefix)
Caterpillar 245 (94L S/N Prefix)
Caterpillar 245 (95V S/N Prefix)
Caterpillar 245B (1SJ S/N Prefix)
Caterpillar 245B (6MF S/N Prefix)
Caterpillar 245D (4LK S/N Prefix)
Caterpillar 375 (1JM S/N Prefix)
Caterpillar 375 (6NK S/N Prefix)
Caterpillar 375 (6RL S/N Prefix)
Caterpillar 375 (8WJ S/N Prefix)
Caterpillar 375 (8XG S/N Prefix)
Caterpillar 375 (9WL S/N Prefix)
Caterpillar 375L (1JM S/N Prefix)
Caterpillar 375L (6RL S/N Prefix)
Caterpillar 375L (8WJ S/N Prefix)
Caterpillar 375L (8XG S/N Prefix)
Caterpillar 375L (9WL S/N Prefix)
Motor Graders (2)
Caterpillar 16G (93U S/N Prefix)
Caterpillar 16H (6ZJ S/N Prefix)
Motor Scrapers (16)
Caterpillar 621B (45P S/N Prefix)
Caterpillar 621E (6AB S/N Prefix)
Caterpillar 621E (6BB S/N Prefix)
Caterpillar 621F (4SK S/N Prefix)
Caterpillar 621F (5JK S/N Prefix)
Caterpillar 621F (9NL S/N Prefix)
Caterpillar 623E (5SG S/N Prefix)
Caterpillar 623E (6CB S/N Prefix)
Caterpillar 623E (6YF S/N Prefix)
Caterpillar 623F (5SG S/N Prefix)
Caterpillar 623F (6BK S/N Prefix)
Caterpillar 627E (6EB S/N Prefix)
Caterpillar 627E (6GB S/N Prefix)
Caterpillar 627E (7CG S/N Prefix)
Caterpillar 627F (1DL S/N Prefix)
Caterpillar 627F (4YK S/N Prefix)
Pipelayers (1)
Caterpillar 583R (2XS S/N Prefix)
Road Reclaimers (2)
Caterpillar RM350 (5FK S/N Prefix)
Caterpillar RR250 (6ED S/N Prefix)
Soil Mixers (1)
Caterpillar SM350 (1RM S/N Prefix)
Soil Stabilizers (1)
Caterpillar SS250 (6DD S/N Prefix)
Track-Type Tractor/Dozers (12)
Caterpillar D350E (9LR S/N Prefix)
Caterpillar D400D (2JJ S/N Prefix)
Caterpillar D400D (8TF S/N Prefix)
Caterpillar D400E (2YR S/N Prefix)
Caterpillar D40D (2JJ S/N Prefix)
Caterpillar D40D (8TF S/N Prefix)
Caterpillar D8N (1XJ S/N Prefix)
Caterpillar D8N (5TJ S/N Prefix)
Caterpillar D8N (7TK S/N Prefix)
Caterpillar D8N (9TC S/N Prefix)
Caterpillar D8R (7XM S/N Prefix)
Caterpillar D8R (9EM S/N Prefix)
Wheel Dozers (9)
Caterpillar 824C (85X S/N Prefix)
Caterpillar 824G (4SN S/N Prefix)
Caterpillar 824G (AWW S/N Prefix)
Caterpillar 825C (86X S/N Prefix)
Caterpillar 825G (6RN S/N Prefix)
Caterpillar 825G (AXB S/N Prefix)
Caterpillar 826C (87X S/N Prefix)
Caterpillar 826G (7LN S/N Prefix)
Caterpillar 826G (AYH S/N Prefix)
Wheel Loaders (12)
Caterpillar 578 (8HB S/N Prefix)
Caterpillar 980 (3HK S/N Prefix)
Caterpillar 980C (13B S/N Prefix)
Caterpillar 980C (63X S/N Prefix)
Caterpillar 980F (3HK S/N Prefix)
Caterpillar 980F (5XJ S/N Prefix)
Caterpillar 980F (8CJ S/N Prefix)
Caterpillar 980F (8JN S/N Prefix)
Caterpillar 980G (2KR S/N Prefix)
Caterpillar 980G (2SR S/N Prefix)
Caterpillar 980G (AWH S/N Prefix)
Caterpillar 983B (58X S/N Prefix)
Engines (57)
Caterpillar 3406C | 11N ESN Prefix
6-cyl • Diesel
Caterpillar 3406B | 11N ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 11N ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 11W ESN Prefix
6-cyl • Diesel
Caterpillar 3406C | 1DZ ESN Prefix
6-cyl • Diesel
Caterpillar 3406C | 1LS ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 1SS ESN Prefix
6-cyl • Diesel
Caterpillar 3406B | 2WB ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 2WB ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 2YR ESN Prefix
6-cyl • Diesel
Caterpillar 3406C | 3ER ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 3ER ESN Prefix
6-cyl • Diesel
Caterpillar 3406B | 3ZJ ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 3ZJ ESN Prefix
6-cyl • Diesel
Caterpillar 3406C | 406 ESN Prefix
6-cyl • Diesel
Caterpillar 3406C | 41Z ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 41Z ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 4CK ESN Prefix
6-cyl • Diesel
Caterpillar 3406B | 4JK ESN Prefix
6-cyl • Diesel
Caterpillar 3406B | 4MG ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 4MG ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 4PM ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 4RG ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 4TB ESN Prefix
6-cyl • Diesel
Caterpillar 3406C | 4ZR ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 5EK ESN Prefix
6-cyl • Diesel
Caterpillar 3406B | 5KJ ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 63X ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 6BR ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 6MF ESN Prefix
6-cyl • Diesel
Caterpillar 3406C | 6TB ESN Prefix
6-cyl • Diesel
Caterpillar 3406B | 6TB ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 6TB ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 6TS ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 70V ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 75Z ESN Prefix
6-cyl • Diesel
Caterpillar 3406B | 7FB ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 7FB ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 7TK ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 7X ESN Prefix
6-cyl • Diesel
Caterpillar 3406C | 8FS ESN Prefix
6-cyl • Diesel
Caterpillar 3406C | 8PN ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 8PN ESN Prefix
6-cyl • Diesel
Caterpillar 3406B | 8TC ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 90U ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 91U ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 92U ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | 9LR ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | AWH ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | AWW ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | AXB ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | AYH ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | BET ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | BKN ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | BMS ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | MHX ESN Prefix
6-cyl • Diesel
Caterpillar 3406 | TXF ESN Prefix
6-cyl • Diesel
While every effort has been made to ensure the accuracy of the fitment information listed above, it is ultimately the responsibility of the installing mechanic to perform a side-by-side comparison of the replacement part with the original to verify proper fit before installation. RF Engine is not liable for labor or consequential damages resulting from incorrect application.

Warranty Information

Reliance Power Parts Warranty Policy

The Reliance Power Parts (RPP) warranty policy covers parts and labor necessary to repair a warrantable failure to the functional condition of the application that existed immediately prior to the failure, as detailed below. This warranty applies to direct customers of RPP only and is non-transferable.


Coverage Periods

  • New Internal Engine Parts (Ag/Industrial): 1 year from invoice date, unlimited miles/hours
  • Engine Overhaul Kits (Heavy-Duty On-Highway): 2 years from invoice date, unlimited miles/hours
  • New Engine Accessories: 1 year from invoice date, parts replacement only
  • Remanufactured Engine Accessories: 6 months from invoice date, parts replacement only
  • Remanufactured Engine & Drivetrain Parts: 6 months from invoice date, parts replacement only
  • Drivetrain Parts: 1 year from invoice date, parts replacement only
  • Complete Engines & New Long Blocks (Reliance Manufactured): 6 months from invoice date, parts replacement only
  • Remanufactured Long/Short Blocks & New Short Blocks (Reliance Manufactured): 90 days from invoice date, parts replacement only

Engine accessories include turbochargers, fuel injectors, hydraulic pumps, engine oil pumps, oil coolers, water pumps, and electrical components.


Manufacturer's Warranty Items

To serve a wider application base, RPP offers lower volume, rare application, and remanufactured parts from a variety of manufacturers. These parts will be noted on your invoice as subject to a "Manufacturer's Warranty" policy and are not covered under this policy. Engines, long blocks, medium blocks, and short blocks produced by any company other than Reliance are solely covered by the manufacturer's warranty. Contact your Reliance representative for details.


Parts & Labor Coverage

  • Parts: Covered at current customer pricing using new or remanufactured RPP approved parts
  • OEM/Outside Parts: When RPP parts are available, OEM parts will be credited at RPP pricing. Parts not available from RPP will be covered at billed rate with invoice required
  • Labor: Offered at RPP's discretion, not to exceed published flat-rate times and maximum regional wholesale hourly labor rate
  • Holiday/Overtime Rates: Not covered

What's Not Covered

This warranty does not cover failures resulting from:

  • Owner or operator abuse or neglect
  • Operation without adequate coolant, fuel, or lubricants
  • Over-fueling or over-speeding
  • Lack of maintenance of lubricating, coolant, or air intake systems
  • Improper storage, starting, warm-up, run-in, or shut-down practices

Coverage does not include:

  • Troubleshooting or diagnostic time
  • Towing, transport, or down-time
  • Rental fees or incidentals
  • Delivery charges, travel, meals, or lodging
  • Business losses, docking, or harbor charges

Responsibilities

  • Installer: Ensure parts are correct for the application and install according to OEM procedures, specifications, and accepted industry standards
  • Owner: Operate and maintain equipment as specified in OEM operation and maintenance manuals

How to File a Claim

  • RPP must be notified prior to the end of the warranty period
  • All warranty repairs must be authorized by RPP technical staff
  • Request a Warranty Claim Form for the return of parts
  • Return all claimed parts to the indicated location within 30 days of receiving a Return Merchandise Authorization
  • Include failed parts, completed Warranty Claim Form, and copies of related work orders or invoices
  • Ship parts freight pre-paid in a condition that makes examination possible
  • Parts received without a Warranty Claim Form will be returned freight collect

Important Notes

  • Professional Installation Required: We strongly recommend installation by a qualified technician to ensure proper break-in and operation
  • Keep Your Records: Retain your invoice and service records for warranty claims
  • Questions?: If you're unsure about coverage or need assistance, please contact us

The warranties set forth herein are the sole warranties made by RPP regarding its parts. RPP makes no other warranties, expressed or implied, of merchantability or fitness for a particular purpose.

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All specifications and numbers are provided for reference only and should be independently verified before use. While we guarantee our parts match their descriptions and accept returns for any discrepancies, we cannot be held liable for installation costs, modifications, or consequential damages. Questions about compatibility? Contact our parts experts at 800-828-6943, sales@dieselcranks.com, or via live chat, Mon-Fri 8am-5pm EST.

Our Best Price Promise

Found the same part somewhere else for less? Send us the link and we’ll beat that price by 5%. We’ve been doing this since 1975, and we’d rather earn your business than lose it over a few dollars.

Some restrictions apply, see Terms & Conditions for details.

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