Skip to product information
SKU:
ZZ3F03020
Same day shipping if ordered by 4PM CST.
5292712 190°F Thermostat with O-Ring for Cummins ISB6.7 4929644 3974371 4929643
$46.19
In Stock
$46.19
Sale price
$46.19
Regular price
Opening Temperature
Estimated delivery between
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
190°F Thermostat with O-Ring for Cummins ISB6.7
This 190°F thermostat with O-Ring is a direct replacement engine cooling component for Cummins ISB6.7 applications, designed to regulate operating temperature and ensure efficient engine performance. It references OEM cross-reference numbers 4929644, 3974371, and 4929643 for compatibility verification.
Overview
This 190°F thermostat with O-Ring for Cummins ISB6.7 maintains optimal engine temperature by controlling coolant flow once the engine reaches its rated opening temperature. The integrated O-Ring provides a reliable seal to prevent coolant leaks, making it suitable for Cummins diesel engines in medium-duty trucks, buses, and industrial equipment. This thermostat helps ensure consistent thermal management for prolonged engine life.
Built For Performance
- Opens at 190°F for precise engine temperature regulation.
- Includes a pre-installed O-Ring for a secure, leak-resistant fit.
- Engineered to match OEM specifications for direct compatibility.
- Rugged construction withstands high coolant pressures and temperatures.
- Facilitates faster warm-up to reduce engine wear during cold starts.
Fits These Machines
- for Cummins ISB6.7 engines
- for Cummins 6.7L diesel applications (with matching part numbers)
On-The-Job Use
- Used in heavy-duty truck cooling systems for over-the-road hauling.
- Applies to construction equipment powered by Cummins 6.7L engines.
- Replacement for bus fleets and delivery vehicles with ISB6.7 power.
- Works in generator sets and agricultural machinery using these engines.
Specs At A Glance
| Opening Temperature | 190°F |
| Includes | O-Ring |
| Part Number(s) | 5292712, 4929644, 3974371, 4929643 |
Good To Know
Q: Is this thermostat compatible with my Cummins ISB6.7? A: It fits ISB6.7 engines when the existing thermostat uses the same 190°F rating and mount pattern; confirm your engine's serial number against the OEM cross-reference numbers listed.
Q: Why does the O-Ring matter for installation? A: The included O-Ring creates the sealing surface between the thermostat and housing, preventing coolant bypass and ensuring the thermostat functions as intended without leaks.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.