Diesel Long Blocks

When a diesel engine is past rebuilding, a long block is often the fastest way back on the road. A long block includes the block, crankshaft, pistons, rods and cylinder head assembled as one unit. You move over your accessories and the truck or machine is ready to run.

Long Blocks We Carry

This collection includes long blocks for the Caterpillar C7, C9, C10, C12, C13, C15 and 3406E. It also includes the Cummins ISX, N14, 5.9L and 8.3L, and the Detroit Diesel Series 60 12.7L and 14L. Stock changes often, so call us if you do not see your engine listed.

Before You Order

Confirm your engine model, serial number and arrangement number. Long blocks are heavy freight items, so ask us about shipping time and any core return. If you only need a partial rebuild, see 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

What is the difference between a long block and a short block?
A short block is the block, crank, pistons and rods. A long block adds the cylinder head and valve train, so it is closer to a complete engine.

Do long blocks need a core return?
Many do. The core terms are shown on each product page, or you can ask our team before ordering.