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New 1127993 Oil Cooler & Lines Gasket Kit Replacement suitable for Caterpillar 3406 Engine Serial Nos. 5EK
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Description for 1127993 Oil Cooler & Lines Gasket Kit
â–¶Specification for 1127993 Oil Cooler & Lines Gasket Kit
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Product Questions
Frequently Asked Questions
What does the 1127993 gasket kit cover on the CAT 3406 engine?
The 1127993 is a gasket kit specifically for the oil cooler lines on the Caterpillar 3406 engine (serial numbers 5EK). It includes all the gaskets needed to seal the oil cooler line connections, preventing oil and coolant leaks that could lead to cross-contamination, overheating, or lubrication failure.
What serial number range does this gasket kit apply to?
This kit is specified for the 3406 engine with serial prefix 5EK. Always confirm the full serial number of your engine against the product listing before ordering. Please reach out to Propel Parts for help verifying fitment if the serial prefix on your engine is different.
What symptoms indicate the oil cooler gaskets on a 3406 need replacing?
Common indicators include oil mixed with coolant (milky oil or discolored coolant), visible leaks around the oil cooler connections, engine overheating, rising oil temperatures, or unexplained fluid consumption. Address these symptoms early to prevent significant engine damage.
Should I flush the cooling system when replacing oil cooler gaskets?
If oil has entered the cooling system or coolant has contaminated the oil, the affected systems should be thoroughly flushed before reassembly. Skipping this step can leave contaminants that damage water pump seals, cooling passages, and oil system components even after the gaskets are replaced.
Is this a complete gasket kit or are additional parts needed?
This kit covers the oil cooler line gaskets for the listed application. Depending on the extent of the service, you may also need O-rings for connected fittings, clamps, or other hardware. Review the service procedure in the 3406 service manual to identify all consumables needed.
Are aftermarket gasket kits reliable for a CAT 3406 engine?
Yes. A high-quality aftermarket gasket kit that meets or exceeds OEM specifications is a reliable and cost-effective option for the 3406. Propel Parts kits are built to OEM material and dimensional standards. For a broader look at available gasket and seal options, visit our seals and gaskets section.
What warranty does this gasket kit carry?
A 1-year unlimited mileage warranty is included with the 1127993 gasket kit. Same-day shipping is available for weekday orders placed before 3:00 PM ET. Propel Parts ships domestically and internationally to over 130 countries.
Compatible Models
This 1127993 Oil Cooler & Lines Gasket Kit is compatible with the following models:
3406, 5EK & more...
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We ship across the U.S., Canada, and over 130 countries worldwide, helping customers keep machines running wherever they operate. Available shipping methods and delivery estimates are shown at checkout so you can select the option that best fits your timeline.
Tracking information is emailed within 24–48 hours after your order is processed, giving you full visibility from dispatch to delivery and peace of mind that your parts are on the way.
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Our refund policy is simple. We offer a 30-day, no-hassle return policy, and we make every effort to provide the best service and highest-quality parts possible. If you’re not fully satisfied with your purchase, you may return it within 30 days for a refund. Full details are available on our Returns Policy page.
Warranty
Buy with confidence. All parts from Propel Parts are covered against material or manufacturer defects for 12 months from the original invoice date. We stand behind every part we sell, so you can count on reliable performance and dependable support. Full details are available on our Warranty Policy page.
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