for Genuine Cummins Thermostat 3629205 Fail-Safe Engine Thermostat

• Customization: Available
• Certification: ISO9001
• Standard Component: Standard Component
• Model NO.: 3629205
• Technics: Forging
• Material: Iron
• Type: Thermostat
• Transport Package: Packing
• Trademark: zhengwei
• Origin: USA
• Production Capacity: 50000 Pieces/Year

Product Description

Key Attributes

Parameter	Detail
Part Number	3629205
Opening Temperature	88°C (190°F)±2°C (initial open) →Full open at 100°C (212°F)
Material	Brass housingwith nitrile rubber seal;stainless-steel spring
Pressure Rating	1.0 MPa (145 psi) burst resistance
Compatibility	Cummins ISX, X15, L9, B6.7 engines (2010–Present)
OEM Equivalents	Motorad 200108 (cross-reference verified)

Product Overview

The Cummins Thermostat 3629205 is a high-precision wax-element thermostat engineered for Cummins diesel engines. It dynamically regulates coolant flow to maintain optimal engine temperature (88–92°C / 190–197°F), ensuring peak combustion efficiency, reduced emissions, and protection against overheating or overcooling.

Core Functions

Temperature Precision ControlT

Opens at 88°C to direct coolant to radiator, preventing engine overheating.
Closes below 85°C to accelerate warm-up, reducing cold-start wear and NOx emissions.
Engine Protection

Fail-safe design: Stuck-open causes slow warm-up; stuck-closed triggers DTC 3714 (overheat warning) and engine derate.
High-flow bypass: Diverts 30% coolant flow during warm-up for uniform cylinder heating.
Emission & Fuel Efficiency

Maintains SCR/DEF systems at ideal operating temps (>70°C) for effective NOx reduction.
Optimizes fuel viscosity, improving mileage by ~3% versus degraded thermostats.

Technical Features

Durability:

Ethylene glycol-resistant seal withstands 500,000+ thermal cycles.
Vibration-tested to 15G @ 200Hz (matching engine harmonic frequencies).
Precision Response:

Wax-pellet expansion delivers linear valve actuation (±1°C accuracy).
Jig-bored bypass ports ensure balanced flow distribution.

Company Profile

Sichuan Zhengwei Power Technology Co.,Ltd. 

Sichuan Zhengwei Power Technology Co.,Ltd. is a comprehensive and diversified enterprise which established in 2009. Headquartered in Building 25, No. 388 Huanghe Road, Xindu District, Chengdu, Sichuan Province, with a registered capital of 10 million yuan.The company has diesel generator unit division, construction machinery division, after-sales service department, parts sales department, foreign trade Department, major customer material supply department, overhaul workshop, etc. It specializes in diesel generator sets, Cummins engine assembly, Cummins pure parts sales and after-sales service. The company not only has a rich product line, including high-quality diesel generator sets and all kinds of pure accessories, but also provides a full range of after-sales service to ensure the stable operation of customers' equipment. In addition, with strong technical strength and rich experience, the company focuses on the maintenance of all kinds of construction machinery at home and abroad, and can provide customers with efficient and professional mechanical equipment maintenance services, solve all kinds of equipment failures, and ensure the normal production and operation of customers. 

FAQ

Q: What's the lead time for orders?
A: Standard models ship in 15–30 days; customized units require 60-90days.

Q: Do you provide after-sales service?
A: Yes, We have a very comprehensive after-sales system.

Q: Can I request a customized parts?
A: Absolutely! We offer tailored attachments.

Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).

Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.