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Cummins 5.9L 12V 6BT Full Gasket Set (Upper + Lower) for Dodge Ram 1989–1998

Cummins 5.9L 12V 6BT Full Gasket Set (Upper + Lower) for Dodge Ram 1989–1998

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Full engine gasket set (upper + lower) for Cummins 5.9L 12-valve (12V) 6B/6BT/6BTA diesel engines. Combines top-end (head) gasket set and lower/bottom-end gasket set for complete engine reseal or rebuild preparation. Essential for engine overhaul.
IMPORTANT: This gasket set is for 12-valve Cummins engines ONLY. Does NOT fit 24-valve or common rail Cummins engines.


Reference Part Numbers:
• 3804897 (Upper/Head Set)• 4089649 (Upper/Head Set)• 3802376 (Lower/Bottom Set)


Fits Cummins Engines:
• 5.9L 12-Valve Diesel• 6B / 6BT / 6BTA
Fits Vehicles:

Dodge Ram 2500 (1989-1998 with 12V Cummins)• Dodge Ram 3500 (1989-1998 with 12V Cummins)• Other 12-valve Cummins applications
What’s Included:


• Upper/head gasket set (top-end)• Lower/bottom-end gasket set• All engine gaskets and seals as shown in photos


NOT Included:


• Head bolts (sold separately - always replace during rebuild)• Internal hard parts (pistons, bearings, etc.)
Application:

Complete gasket set designed for Cummins 12-valve diesel engine rebuilds or reseals. Includes all necessary gaskets and seals to prevent oil and coolant leaks. Essential for engine overhaul, head gasket replacement, or complete engine reseal.
Installation Note:


Professional installation highly recommended for engine rebuild. Follow Cummins factory service manual for proper torque specifications, gasket installation procedures, and sealant requirements. Inspect all mating surfaces for damage before installing new gaskets. Replace head bolts - never reuse torque-to-yield bolts.
Fitment Verification:


Confirm your engine is 12-valve (12V) - NOT 24-valve or common rail. Compare product photos to verify exact contents match your needs.


Ships fast from our USA warehouse with same-day processing on orders placed before 3 PM PST.

Not sure it fits? Call (818) 261-3896

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COMPATIBILITY

Fits These Cummins 12-Valve Engines

✓ Cummins 5.9L 12-Valve Diesel (6B/6BT/6BTA)
✓ Dodge Ram 2500 (1989-1998)
✓ Dodge Ram 3500 (1989-1998)
✓ 12V Cummins Applications (NOT 24V)
⚠️ IMPORTANT: 12-Valve ONLY
This gasket set is for 12-valve Cummins engines ONLY. Does NOT fit 24-valve or common rail Cummins engines. Verify your engine is 12V before ordering.

WHAT'S INCLUDED

Full Gasket Set (Upper + Lower)

⬆️
Upper/Head Gasket Set
⬇️
Lower/Bottom-End Set
🔩
All Engine Gaskets
🔒
Engine Seals Included
📐
Part #3804897 / 4089649
✅
Complete Rebuild Kit

Note: Head bolts NOT included unless shown in photos. Compare photos to confirm exact contents before purchase.

WHEN TO REPLACE

When to Use This Gasket Set

Replace gaskets during engine rebuild or if you notice:

⚠️ Complete engine rebuild
⚠️ Head gasket failure
⚠️ Oil leaks from engine
⚠️ Coolant/oil mixing
⚠️ Engine overhaul/reseal
⚠️ Multiple seal failures

CUSTOMER REVIEWS

Trusted by Tractor Owners Nationwide

★★★★★ 4.63 out of 5 stars (927 reviews)
★★★★★
Perfect Fit
VERIFIED REVIEW

"Exact replacement for my Ford 4600. Installed in 20 minutes and tractor fired right up. Quality part at a great price. Will order from Arko again."

Mike T. • Verified Buyer • March 2026
★★★★★
Fast Shipping & Great Support
VERIFIED REVIEW

"Ordered Monday morning, received Wednesday. Called with a fitment question and spoke to someone who actually knew tractors. Part works perfectly on my Kubota."

James R. • Verified Buyer • March 2026
★★★★★
Better Than OEM
VERIFIED REVIEW

"This gasket kit saved me hundreds compared to dealer pricing. Quality is excellent, everything fit perfectly. No leaks after 50+ hours of operation."

David L. • Verified Buyer • February 2026

FAQ

Common Questions

Is this a full engine gasket set?

Yes, this is a full gasket set (upper + lower) combining the top-end (head) gasket set and the lower/bottom-end gasket set for complete engine reseal/rebuild preparation. Includes all gaskets and seals as shown in photos.

Does it fit 24-valve or common rail Cummins?

No. This listing is for 5.9L 12-valve (12V) 6B/6BT/6BTA engines ONLY. It does NOT fit 24-valve (24V) or common rail Cummins engines. Verify your engine is 12-valve before ordering.

Are head bolts included?

No, head bolts are not included unless shown in the photos. Head bolts are typically sold separately and should be replaced during engine rebuild. Torque-to-yield bolts should never be reused.

How often should I replace my Bobcat’s timing belt?

Bobcat/Deutz recommend timing belt replacement every 2,000-3,000 engine hours or 3-5 years, whichever comes first. Always inspect the belt during routine maintenance for signs of wear, cracking, or contamination. If in doubt, replace it—timing belt failure can destroy the engine and cost thousands in repairs.

What's your return policy

We offer free returns within 30 days if the part doesn't fit or you're not satisfied. Parts must be unused and in original packaging.

Do you offer technical support?

Yes. Call (818) 261-3896 and we'll help you confirm fitment, answer installation questions, or troubleshoot issues.

How long does shipping take?

Orders ship same-day if placed before 3 PM EST. Standard delivery is 3-5 business days.

Complete Your Cummins 12V Rebuild

Full gasket set (upper + lower) for Cummins 5.9L 12-valve engines. Dodge Ram 1989-1998. Complete engine rebuild kit.

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📞 Questions? (818) 261-3896