Oil Cooler Supplier — OEM & Aftermarket Supply

Product Overview

The oil cooler is a critical component in any diesel generator set. It maintains engine lubricating oil within the optimal temperature range (typically 85–105°C) by transferring excess heat from the oil to the engine coolant (water-cooled type) or ambient air (air-cooled type). In continuous-duty generator applications, the oil cooler prevents thermal breakdown of lubricating oil, which would otherwise lead to loss of viscosity, increased wear, and accelerated deposit formation on critical engine components. In the demanding world of continuous power generation — whether for mining operations in remote Australia, hospital backup systems in Nigeria, or data center prime power in Singapore — the reliability of the oil cooler directly determines the reliability of the entire generator system.

Oil cooler internal leakage — where coolant enters the oil circuit through corroded or cracked cooler cores — is one of the most insidious engine failures because it can go undetected until bearing damage has already occurred. The resulting oil-water emulsion loses lubricity and causes accelerated main/rod bearing wear. External oil leaks from cooler gasket failure create fire risks in enclosed generator enclosures. In dusty environments (mining, construction), air-cooled oil coolers can become clogged with debris, reducing cooling efficiency by 40–60%.

As a leading diesel generator parts supplier based in Shandong, China — the heart of the country’s diesel engine manufacturing hub — Huaquan offers immediate availability on hundreds of Oil Cooler models. We maintain a standing inventory of OEM and premium aftermarket units, enabling same-day dispatch for urgent orders and 3–7 day air freight delivery to any major international port.

Huaquan supplies plate-type and shell-and-tube oil coolers for all major diesel generator engine models. Our oil coolers feature brazed aluminum or copper-nickel core construction with turbulator-enhanced heat transfer surfaces for maximum cooling efficiency in a compact form factor. Each unit is pressure-tested to 2.0× operating pressure on both the oil and coolant sides to verify seal integrity before shipment.

Key product features at a glance:

– Available for 20+ diesel engine brands (Cummins, Perkins, Volvo Penta, MTU, Doosan, Deutz, Weichai, Yuchai, Shangchai, and more)
– OEM original and ISO-certified aftermarket options
– 100% functionally tested and verified before shipment
– 12-month warranty against manufacturing defects
– 24-hour dispatch for in-stock items
– Technical support and cross-reference assistance available

Technical Specifications

Model	Application	Core Type	Compatible Engine
Built-In Oil Cooler (Compact)	10–30 kW Small Generator Sets	Brazed Aluminum Plate-Fin	Small Diesel Engines (495 Series)
R6105 Oil Cooler	80–150 kW Generator Sets	Aluminum Plate-Type, Water-Cooled	R6105/6105IZLD Series
Universal Oil Cooler (Medium)	30–100 kW Generator Sets	Plate-and-Fin, Water-Cooled	4100/4105/6105/6113 Series
Generator Set Oil Cooler	50–200 kW Generator Sets	Shell-and-Tube, Copper Core	Various Diesel Generator Engines

Note: The above represents our most commonly stocked models. If your specific oil cooler model is not listed, please contact us with your engine model and part number — our sourcing team can typically locate any specification within 2–3 working days.

OEM vs Aftermarket Options

Choosing between OEM original and aftermarket Oil Cooler is one of the most important procurement decisions for generator fleet operators and parts distributors. Each option has distinct advantages depending on your application, budget, and operational requirements.

OEM Original Oil Cooler

Advantages:

– Perfect fit and finish: Manufactured to the engine maker’s exact drawings and material specifications. No adaptation or modification required — bolt-on replacement guaranteed.
– Full manufacturer warranty: Typically 12–24 months, backed by the engine manufacturer’s global warranty network. For critical applications (hospitals, data centers), this warranty coverage can be essential for compliance and insurance purposes.
– Proven performance history: OEM parts have millions of operating hours of field validation across diverse operating conditions.
– Resale value preservation: Equipment maintained with OEM parts retains higher resale value and is easier to sell.

Limitations:

– Higher cost: OEM Oil Cooler typically cost 2–4× the price of equivalent aftermarket units.
– Longer lead times: OEM parts often ship from centralized regional warehouses with lead times of 4–8 weeks for non-stock items.
– Limited availability: Older or discontinued engine models may have limited or no OEM parts support.

Our supplier network gives you access to both OEM-original and ISO-certified aftermarket Oil Cooler options. For fleets operating mixed-brand generator sets, we provide a single-source solution — one purchase order covers Oil Cooler for Cummins, Perkins, Weichai, Volvo, MTU, and more. This eliminates the complexity of managing multiple supplier relationships across different engine platforms.

Aftermarket Oil Cooler

Advantages:

– Significant cost savings: High-quality aftermarket Oil Cooler deliver 40–60% savings versus OEM pricing while meeting or exceeding original performance specifications.
– Broader availability: Aftermarket manufacturers often continue producing parts for legacy engines long after OEM support ends.
– Faster delivery: Huaquan stocks aftermarket Oil Cooler for immediate dispatch.
– Customization options: Bulk buyers can specify material upgrades or packaging modifications that OEM channels cannot accommodate.

Limitations:

– Quality variability: The aftermarket includes everything from premium ISO-certified manufacturers to unknown low-cost producers. Working with a trusted supplier like Huaquan ensures you receive only premium-grade aftermarket products.
– Warranty considerations: Some generator warranties require OEM parts during the warranty period.

Making the Right Choice

Huaquan supplies both OEM and aftermarket Oil Cooler, allowing you to choose the right option for each application.

Compatible Generator Brands

Our Oil Cooler inventory covers the following diesel engine brands and series:

Don’t see your engine brand? Contact us — our procurement network extends to 30+ engine manufacturers.

Why Choose Huaquan

As a specialist generator parts supplier, Huaquan has built a procurement network spanning 200+ factories across China’s diesel engine industrial cluster in Shandong Province. This gives us unparalleled access to OEM-tier production lines and the ability to cross-reference parts across brands. Our warehouse stocks over 50,000 SKUs, enabling 24-hour dispatch on 95% of orders.

Huaquan at a glance:

Application Scenarios

Huaquan Oil Cooler are used in generator sets across diverse industries:

Frequently Asked Questions

Q1: What is the minimum order quantity (MOQ) for Oil Cooler?

Our standard MOQ is 1 unit for stock items. For non-stock or special-order Oil Cooler models, the MOQ is typically 5–10 units depending on the specification. Contact our sales team for exact MOQ on your required model.

Q2: How fast can you ship Oil Cooler after order confirmation?

In-stock Oil Cooler ships within 24 hours of payment confirmation. For air freight, delivery to major international airports takes 3–7 days. Sea freight to major ports takes 15–35 days depending on destination. We use DHL/FedEx for urgent small parcels (3–5 days worldwide).

Q3: Do you stock Oil Cooler for all major generator brands?

Yes. We maintain inventory of Oil Cooler compatible with Cummins, Perkins, Volvo Penta, MTU, Doosan, Deutz, Weichai, Yuchai, Shangchai, and 10+ other engine brands. If your specific model is not in stock, our sourcing team can typically procure it within 3–5 working days.

Q4: Can you provide a certificate of origin and test reports?

Absolutely. Every Oil Cooler shipment includes a certificate of origin (Form E / Form F available for preferential tariffs), material test certificates, and functional test reports. ISO 9001 certificates and CE documentation are also provided upon request.

Q5: What warranty do you offer on Oil Cooler?

All Huaquan-supplied Oil Cooler carry a 12-month warranty from the date of shipment against manufacturing defects. OEM original parts carry the manufacturer’s full warranty. Claims are processed within 5 working days with photo/video evidence.

Q6: Do you offer samples for quality evaluation before bulk orders?

Yes. We can ship 1–2 sample units via DHL/FedEx for your evaluation. Sample shipping costs are borne by the buyer but are refundable against your first bulk order exceeding USD 2,000.

Q7: What payment terms do you accept?

We accept T/T (bank transfer), L/C at sight, and Western Union for small orders. Standard terms are 30% advance with order, 70% before shipment. For established wholesale partners, we offer 30-day net terms after a successful trial period.

Q8: Can I visit your warehouse or factory before placing an order?

We welcome factory and warehouse visits. Our facility is located in Weifang, Shandong Province, approximately 2 hours from Qingdao International Airport. We can arrange airport pickup and hotel accommodation for visiting buyers.

Get a Quote

Need a reliable Oil Cooler supplier? Contact Huaquan for bulk pricing, inventory availability, and shipping schedules. Our sourcing team responds to RFQs within 4 business hours.

Contact Information:

– Email: lb@hqdl.cn
– Website: accessories.huaquanpower.net
– WhatsApp/WeChat: Available upon email request
– Office Hours: Monday–Saturday, 08:00–18:00 (UTC+8)

What to include in your inquiry:

1. Generator brand, model, and power rating (kW/kVA)
2. Oil Cooler part number (if known)
3. Required quantity and preferred quality tier (OEM / Premium Aftermarket / Economy)
4. Destination port or airport
5. Your company name and country

Our team responds to all inquiries within 4 business hours and provides formal quotations within 24 hours.

Related Products

– Oil Pump Supplier | Oil Pump Price
– Oil Filter Supplier | Oil Filter Price
– Gasket Kit Supplier | Gasket Kit Price

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*Huaquan Power — Your Trusted Partner for Diesel Generator Spare Parts Since 2005*

Oil Cooler Supplier — OEM & Aftermarket for Diesel Generators | Huaquan