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SKU:
NLT2T04884
Ships for free in 2–4 business days.
Engine Oil Cooler Core 3959031 for Cummins 5.9L 24-Valve Diesel
$137.49
In Stock
$137.49
Sale price
$137.49
Regular price
This replacement engine oil cooler core matches Cummins reference 3959031 in selected 5.9L diesel installations. It transfers heat from the engine oil to the cooling system.
Estimated delivery between
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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
- Selected 2003–2006 Dodge Ram 2500/3500 trucks with applicable Cummins 5.9L 24-valve diesel; other ISBe applications require specific confirmation
Confirm the 5.9L engine family, housing design, cooler dimensions and application year.
Product Overview
A damaged oil cooler can cause oil and coolant to mix or reduce oil-temperature control. A cooler replacement should follow inspection of the seals, housing and cooling system.
Key Features & Performance
Cummins oil cooler core 3959031; the “24V” in the original listing refers to a 24-valve engine, not cooler operating voltage.
OE / Reference Numbers
- 3959031
When to Replace This Part
Coolant/oil cross-contamination, a leaking core or poor oil-temperature control confirmed by testing.
Frequently Asked Questions
How do I confirm this is the correct part? Confirm the 5.9L engine family, housing design, cooler dimensions and application year.
Is this a genuine OEM part? No. This listing is for an aftermarket replacement unless expressly identified otherwise. OE references are supplied to identify the intended application.
Part Summary
keywords: engine oil cooler core, engine oil cooler core 3959031 for cummins 5.9l 24-valve diesel, 3959031, selected 2003–2006 dodge ram 2500/3500 trucks with applicable cummins 5.9l 24-valve diesel; other isbe applications require specific confirmation
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.