INDUSTRIAL INJECTION PDM-LMLSH GM REMANUFACTURED STOCK HEADS FOR 11-16 LML 6.6L DURAMAX

The Industrial Injection LML Duramax Stock Remanufactured Heads are designed to be a factory replacement. Complete ready to bolt on.Heads are first jet washed in a high pressure spray cabinet to remove oil and dirt, then glass beaded to remove carbon.

Next they are checked by magnafluxing, (cast iron only) or pressure testing. They are visually inspected for defects that would make them unusable. New High Strength Alloy, Heat Treated iron based valve guides are installed.

These guides are heat treated to Rockwell 22 Scale, which produces the ultimate in wear resistance. This is far superior to original guide material, including Bronze. The guide incorporates a spiral grove inside the guide to hold oil and aid the lubrication of the valve during engine operation.

Guides are then honed (not reamed) to exact size using a diamond honing mandrel. Diamond abrasives allow for consistency of size, surface finish, and bore geometry with no variation from guide to guide.

The guide size is then verified using a valve guide bore gauge. As needed the head receives new Premium valve seat inserts made from a true Nickel Based Non-Magnetic material that was developed for extreme operating conditions.

Next the head is treated to a multi angle valve job to help maximize the flow of air in and out of the head. This is accomplished using a Serdi 100 guide and seat machine. Serdi uses a solid carbide straight shank pilot.

When inserted into the valve guide, it simulates the real valve stem during the centering process. This guarantees the valve seat is finished for a perfect valve to seat match. Using CBN or Diamond tooling the head is given a new surface.

With our berco milling machine we can control the surface finish to accommodate different head gasket types. For example MLS head gaskets require a very smooth surface finish.Finally the head is jet washed dried and assembled with new valve seals and new valve springs.

Features: 

• Direct Replacement
• Diamond Honed Guides
• Unshrouded Valves
• High Strength Alloy, Heat Treated iron based valve guides
• Premium valve seat inserts made from a true Nickel Based Non-Magnetic material
• Multi angle valve job
• New valve springs
• Sold in a pair

Note: To receive full core credit we need a good, re-useable pair of cylinder heads. No cracks, warping, or excessive wear.

The Industrial Injection PDM-LMLSH GM Remanufactured Stock Heads are the perfect solution for those seeking a reliable replacement for their 2011-2016 LML 6.6L Duramax engines. These heads arrive complete and ready for a seamless bolt-on installation, ensuring minimal downtime for your vehicle. Crafted with meticulous attention to detail, each head undergoes a rigorous cleaning process, first being jet washed to eliminate oil and dirt, followed by glass bead treatment to eradicate carbon buildup.

Quality is paramount; hence, every head is subjected to magnafluxing or pressure testing to identify any unseen defects. The heads are equipped with new high-strength alloy valve guides, heat treated to Rockwell 22 for exceptional wear resistance. This surpasses standard guide materials, such as bronze, while incorporating a spiral groove design that enhances oil retention and valve lubrication during operation.

Precision continues as the guides are diamond honed to exact specifications, guaranteeing uniformity across all guides. New premium valve seat inserts made from nickel-based, non-magnetic materials further reinforce durability under extreme conditions. A meticulous multi-angle valve job is employed to optimize airflow, utilizing a Serdi 100 machine for unmatched accuracy in valve seating.

To accommodate different head gasket types, surface finishing is precisely controlled using a Berco milling machine, crucial for applications requiring smooth finishes like MLS head gaskets. The finishing touches include thorough jet washing, drying, and assembly with new valve seals and springs to ensure peak performance.

Sold in pairs, these remanufactured heads represent an investment in the longevity of your Duramax engine, offering a direct replacement with enhanced features that stand up to the challenges of demanding environments. Please note that to qualify for full core credit, a pair of reusable cylinder heads in good condition is required.