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Remanufactured Engine Blocks and Cylinder Blocks

Warranty ProgramThe remanufactured engine block department  is reliable, accurate and dependable. Machining an engine block is a complex and meticulous process. We continually strive for quality and attention to detail. We go through a detailed 18 step process when machining our remanufactured engine blocks. CBN technology gives us the ability to machine an engine block to exact roughness (Ra) specifications. All reman engine blocks must meet OEM hardness specifications and come with a 1 Year Unlimited Miles WarrantyDiesel Engine Block

Remanufactured Engine Blocks Machining Process

We have a 18 point process for our rebuilt engine blocks.

1. Reman Engine Block Cleaning

The first step we take for our remanufactured engine blocks is to clean the entire engine block ensuring Vat Block. We also steam clean the wire wheel surfaces. It is important to clean the used engine block thoroughly as we need to accurately inspect the cylinder block for cracks. Many used engine blocks come to us with oil, grease and corrosion on them. Oftentimes, used engine blocks have electrolysis corrosion damage that needs to be cleaned. We use industrial solvents along with wire brushes to restore the used engine block to its original condition.

2. Magnaflux Reman Engine Block

The second step in the engine block remanufacturing process is to magnaflux the entire remanufactured engine block. We magnaflux with Androx 9704 and check under a blacklight for cracks and structural imperfections. If the used engine block has significant cracks that can’t be welded it is deemed unfit to be a remanufactured engine block.

3. Inspect Piston Bores

We inspect the piston bores as needed. We mic the bores to determine if they can be saved. We also determine if the piston bores are oversized or sleeved. We then remove the cam bearings from the remanufactured engine block.

4. Check Remanufacured Engine Block Line Bore

Block with ValvesWe check the line bore in our reman engine blocks. We check the torque caps and check the line bore for straightness. We then edge and mic bores for out of roundness. It is standard practice at Capital Reman to not cut the saddle. Some in the industry will cut the saddle in their remanufactured engine blocks but we find that cutting the saddle can throw off the dimensions.

5. Check Surface and Deck Height

Then we check the surface and deck height. We visually inspect the water ports and compression seals for wear.  We check the straight edge warpage. We also measure the deck height within all of our rebuilt engine blocks.

6. Check Upper Sleeves

The sixth step in the cylinder block remanufacturing process is to check the upper sleeves as need. We mic counter bores for wear. We also visually inspect for corrosion. It is important to check for corrosion, if corrosion is present within the used engine block we address the issue immediately.

7. Check Lower Sleeves

The seventh step in the remanufactured engine block process is to check the lower sleeves as needed. We mic counter bores for wear. Then we check for corrosion again as we do with the upper sleeves. It is very important that all rust issues are resolved before any further rebuilding can occur with the remanufactured engine blocks.

8. Determine Parts for Rebuilt Engine Block

The eight step in the engine block remanufacturing process is to determine what reman parts are needed for the reman engine block. We fill out a materials requisition form and turn it in to our parts department. No matter the shape of our used engine blocks we always order the block base, cam bearings and oil gallery plugs. The oil gallery plugs are one of the most important parts in the entire rebuilt engine block as they deliver a constant flow of oil to the running engine.

9. Bore the Reman Engine Block

The ninth step in the engine block remanufacturing process is to determine positioning in the boring machine. We set the cylinder block in the boring machine at the right angle and position for machining. We then cut our rebuilt engine blocks to the necessary OEM specifications. Standard cuts, while machining an engine block, are within three thousandths of an inch.

10. Honing an Engine Block to OEM Specs

The tenth step for rebuilt engine blocks is further honing the bore with our Sunnen Honing Machine. Machining an engine block with the Sunnen Honing Machine helps us further refine the surface. We continue to hone the bore further if needed to make sure the entire remanufactured engine block meets OEM specifications. Sometimes we only need to bore very little to simply keep the cylinder block at standard specifications; other times we need to hone more to completely remanufacture the cylinder block. Honing engine block work is precise and tedious.

11. Inspect the Line Bore

CAT 3306 BlockThe eleventh step in the engine block remanufacturing process is to fix the line bore as needed. We set our rebuilt engine blocks and make sure it is square. We use a feeler gauge and a straight edge to check for indications of warped metal. Most used engine blocks come to us with warped metal that needs be refurbished. Our machine shop technicians then clip the caps on mill. After we clip the caps we cut and torque the caps and cut the line bore. Lastly we check for straightness while machining an engine block. If line bore in the reman engine block is not straight re-straighten until the precise measurement is acquired.

12. Surface the Cylinder Block

The twelfth step for remanufactured engine blocks is to create a smooth surface on the cylinder block. We set our rebuilt engine blocks in the surface machine and surface the entire cylinder block. All of our reman engine blocks are bored and surfaced as many times as needed to get the smoothest surface as possible.

13. Cut the Upper Sleeves

The thirteenth step in the engine block remanufacturing process is cutting the upper sleeves as needed.  Machining an engine block with the proper alignment is extremely important. Once properly aligned, we cut for the counterbore sleeve. Next, we knock the sleeve into place. Lastly, we cut to the finished size and polish the upper sleeves.

14. Steam Press Our Remanufactured Engine Blocks

The fourteenth step in the engine block remanufacturing process is a final cleaning of the reman engine block. We steam the entire engine block in extremely hot water using a steam press. After our rebuilt engine blocks are cleaned we then install the cam bearings and oil gallery plugs.

15. Quality Control Inspection

The fifteenth step in the engine block remanufacturing process is the quality control inspection. Our quality control department uses a completely different set of calibrated instruments to test and measure for imperfections within our remanufactured engine blocks. Any mistakes within the rebuilt engine block are immediately fixed. Machining an engine block for a second time is sometimes needed to get the most precise cut. Once the reman engine block passes quality control it is sent for painting.

16. Cast Blast or Paint the Rebuilt Engine Block

The sixteenth step in the engine block remanufacturing process is painting. We paint our rebuilt engine blocks the factory color or cast blast the entire engine block. Cast Blast is a professional grade iron paint that is used on cast iron parts. Cast Blast is heat resistant up to 250 degrees and protects against rust. We cast blast or paint every remanufactured engine block that leaves our facility.

17. Packaging

The seventeenth step in the engine block remanufacturing process is packaging. The entire rebuilt engine block is strapped down, wrapped in protective packaging and crated. All rebuilt engine blocks are packaged in a way to ensure there is no damage during shipping.

18. Final Shipping

The Final step in the engine block remanufacturing process is the final shipping. We check the work order, final invoice and warranty information. Once everything is verified we ship the OEM level certified remanufactured engine block to its final destination.

1 Year Warranty Program

Capital Reman Exchange, LLC warrants its remanufactured products to be free from defects in material or workmanship and provides a warranty that includes 12 months unlimited miles of which the first 6 months will include parts and labor. The second 6 months will include replacement parts or components either new or remanufactured to OEM specifications. Read the entire warranty program here.

Contact a Capital Reman sales representative today for more information about Engine Blocks!

Call Capital Reman Exchange Today at 1-844-239-8101 For Immediate Sales Service

customer testimonial
Capital Reman Exchange did an outstanding job completely rebuilding out old Cummins 855 engine. The office staff was professional, very responsive to our needs and the outcome was fantastic. I recommend them to everyone.
customer testimonial
Rick U., Phoenix, AZ
customer testimonial
Excellent service! Working Saturday to accommodate me while coming down from Canada. I couldn't have asked for any better. Thank you!!
customer testimonial
Barry De Pape, Winnipeg Manitoba
customer testimonial
I am very pleased with your help and product and look forward to working with you in the future. Thanks.
customer testimonial
Mike H., Minnesota


Parts & Labor

We offer an unlimited miles 1 year warranty on our diesel engines.

Contact us for more information on our warranty program.

Our Warranty

Modern Facilities &

Our modern facilities and equipment include our full machine shop and separate engine building departments.

These facilities help keep Capital Reman Exchange a cut above the competition.

Remanufactured Engines

Engine Builders

We believe our consultative approach to solving diesel engine problems helps to craft the perfect solution to fit your specific application.

Call us today, we would love to help you with all of your heavy duty engine needs!