Cummins Engine Heat Exchangers: Precise Temperature Control to Protect Lubrication System
Heat exchangers (oil coolers) act as the external kidney of the engine lubrication system, directly governing oil viscosity stability and overall engine service life.We supply OEM-grade complete heat exchanger assemblies and core elements for classic high-horsepower Cummins models including NT855, K19 and K38. Manufactured with premium copper or stainless steel heat exchange tubes and anti-cavitation coating, our products deliver efficient oil cooling under heavy-load and high-temperature operating conditions. They eliminate the risk of oil-water mixing, supporting continuous efficient operation of generator sets, marine vessels and construction machinery.
Cummins Engine Heat Exchangers:
Precise Temperature Control to Protect Lubrication System
Product Overview
Heat exchangers (oil coolers) act as the external kidney of the engine lubrication system, directly governing oil viscosity stability and overall engine service life.We supply OEM-grade complete heat exchanger assemblies and core elements for classic high-horsepower Cummins models including NT855, K19 and K38. Manufactured with premium copper or stainless steel heat exchange tubes and anti-cavitation coating, our products deliver efficient oil cooling under heavy-load and high-temperature operating conditions. They eliminate the risk of oil-water mixing, supporting continuous efficient operation of generator sets, marine vessels and construction machinery.
Core Advantages
High-Efficiency Heat Exchange
Designed with dense tube bundles, heat exchange efficiency is boosted by 25%, keeping oil temperature stably within the optimal range of 85℃–105℃.
Eliminate Oil Emulsification
Optimized sealing structure paired with high-temperature resistant O-rings thoroughly solves oil-water mixing (emulsification) caused by temperature fluctuation.
Upgraded Corrosion Resistance
The core undergoes special anti-corrosion treatment with 50% improved cavitation resistance, perfectly adapting to coastal high salt-fog environments and acidic mining working conditions.
GENUINE Perfect Matching
100% compliant with Cummins OEM standards, with precisely matched flange interfaces and mounting dimensions. No modification required for plug-and-play installation.
Detailed Model-by-Model Application Introduction
NT855 Series Heat Exchangers
- Applicable Engines: NT855, NTA855 (used on bulldozers, excavators, generator sets)
- Core Part Numbers: 3050385, 3655859, 3900145
- Technical Highlights: The flow channels are optimized to match the high-torque working conditions of NT855 engines, boosting coolant flow rate by 15%. It effectively resolves the issue of excessive oil temperature caused by prolonged heavy-duty operations such as rock crushing and earth moving
K19 / K38 Series Heat Exchangers
- Applicable Engines:K19 & KTA19 (400–500kW generator sets); K38 & KTA38 (800kW+ power units / marine vessels)
- Core Part Numbers: 3968810, 4019855, 4296175
- Technical Highlights:Custom-engineered for the high oil pressure characteristics of K-series V-type engines. Equipped with thickened shells and reinforced cores, its pressure resistance is increased by 30%, maintaining stable oil temperature for high-horsepower units under full-load continuous operation.
Technical Parameters & Certifications
| Model | Compatible Engines | Core Material | Heat Exchange Efficiency Improvement | Application Scenarios |
| NT855 Standard Type | NTA855 | Cast Iron + Copper Core | 20% | Construction Machinery, Generator Sets |
| K-Series Heavy-Duty Type | K19 / K38 | Cast Iron + Stainless Steel Core | 25% | Marine Main Engines, Large Power Stations |
Quality Certification
All products are certified under the ISO9001 quality management system. Every batch comes with a 100% air tightness test report.
Application Cases & Customer Testimonials
- Marine Industry:A fishing fleet operating in the East China Sea previously suffered frequent corrosion and perforation on the original heat exchangers of K38 main engines. After switching to our stainless steel core heat exchangers, no seawater leakage failures occurred for 3 consecutive years, and the lubricating oil quality was greatly improved.
- Mining Industry:An NT855 excavator deployed at a copper mine in western China was fitted with our 3655859 heat exchanger. The engine oil temperature dropped by 10℃ during high-temperature summer periods, extending the engine overhaul cycle by 2000 working hours.
Service Commitments
- In-Stock Direct Shipment:Dual warehouses in Chongqing and Shandong maintain inventory of standard models (e.g. 3050385), with shipments dispatched within 24 hours.
- Technical Support:Free heat exchanger troubleshooting manuals available; precise part matching supported via Engine Serial Number (ESN).
- Warranty Policy:12-month extended warranty. Free replacement for non-artificial damage such as frost cracking.
- Get Your Customized Solution Now:Submit your engine model or serial number, our engineers will recommend the optimal heat exchanger configuration within 1 hour!