1 1

Cummins 4BT 3.9 Engine Rebuild Kit

Cummins 4BT 3.9 Engine Rebuild Kit

2409-2410-1216

  • 52,000 Happy Customers
  • Free Shipping
  • 30-Day Free Returns
$379.99
$379.99
Sale Sold out
Shipping calculated at checkout.

Complete upper engine rebuild kit for Cummins 4BT 3.9 liter diesel engines.

This comprehensive kit includes complete gasket set, seals, and 8-valve cylinder head components for 102mm standard bore engines. Precision-manufactured parts meet or exceed OEM specifications.

Perfect for engines needing valve train refresh, head gasket replacement, or upper-end overhaul. Includes all gaskets, seals, and components needed for professional cylinder head service. 

Ideal for industrial equipment, marine applications, and automotive conversions.

Professional-grade quality for reliable Cummins performance.

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

Join 52,000+ satisfied customers

View full details

COMPATIBILITY

Fits These Cummins 4BT 3.9L Engines

✓ Cummins 4BT 3.9L Diesel Engine
✓ Cummins 4BTA 3.9L Turbo
✓ 102mm Standard Bore Engines
✓ 8-Valve Cylinder Head
✓ Industrial & Marine Applications
✓ Agricultural Equipment
✓ Automotive Conversions
✓ Generator & Pump Sets

WHAT'S INCLUDED

Complete Upper Engine Rebuild Kit

📋
Complete Gasket Set
💧
Seals & O-Rings
💨
Valve Cover Gasket
🔧
Cylinder Head Gasket
✅
102mm STD Bore
🚚
Same-Day Shipping

WHEN TO REPLACE

Warning Signs You Need This Kit

Use this upper rebuild kit if you notice:

⚠️ Blown head gasket
⚠️ Coolant in oil or oil in coolant
⚠️ White smoke from exhaust
⚠️ Valve train noise or ticking
⚠️ Oil leaks from valve cover
⚠️ Cylinder head service needed

CUSTOMER REVIEWS

Trusted by Tractor Owners Nationwide

★★★★★ 4.6 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 complete engine rebuild kit or just upper?

This is an UPPER rebuild kit. It includes gaskets and seals for cylinder head service. For a complete rebuild, you'll also need pistons, rings, bearings, and lower-end components.

Does this include pistons and rings?

No, this upper kit includes gaskets and seals only. Pistons, rings, and bearings are sold separately as a lower rebuild kit.

What does "102mm STD" mean?

102mm is the standard bore diameter. STD means standard size (not oversized). This kit fits engines with standard bore dimensions that haven't been machined oversize.

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.

Restore Your Cummins 4BT to Peak Performance

Complete upper rebuild kit for Cummins 4BT 3.9L diesel. Includes gaskets, seals, and head components. 102mm STD bore. Ships same-day.

ADD TO CART — $379.99
📞 Questions? (818) 261-3896