Diesel Oil Coolers

The oil cooler keeps engine oil at a safe temperature. A leaking or clogged cooler can mix oil and coolant, raise oil temperature and shorten engine life. Signs include oil in the coolant, coolant in the oil and high oil temperature readings.

Replacement Diesel Oil Coolers

Internet Diesel carries replacement oil coolers for heavy-duty diesel engines. Stock in this collection is limited and changes often. If you do not see your engine here, call us and we will check what we can source for you.

Install Tips

Flush the cooling system and change the oil after an oil cooler failure, so no contamination is left behind. Replace the gaskets and o-rings at the same time. If the engine needs more work, browse our inframe kits and cylinder heads.

Questions about fitment? Call 1-800-562-0360 or email sales@internetdiesel.com with your engine serial number. We ship nationwide from our Los Angeles warehouse at 4260 E. Washington Blvd. See our warranty policy or pay over time with Affirm.

Frequently Asked Questions

How do I know my oil cooler failed?
Oil in the coolant, coolant in the oil, or high oil temperature are the most common signs.

Can you source a cooler not listed here?
Often yes. Call us with your engine model and serial number and we will check.