INDUSTRIAL INJECTION PDM-LLYSH GM REMANUFACTURED HEADS FOR 2004.5-2005 LLY 6.6L DURAMAX

The Industrial Injection LLY 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: These heads are converted from LBZ/LMM heads because of the lack of quality LLY head cores. You will need to use LBZ/LMM Glow plugs.

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-LLYSH GM Remanufactured Heads are the pinnacle of performance and reliability for 2004.5-2005 LLY 6.6L Duramax engines, designed as a direct factory replacement that ensures seamless installation. With a commitment to quality, each head undergoes a meticulous remanufacturing process that begins with high-pressure jet washing to eliminate contaminants and dirt.

Following this, the heads are glass beaded to remove carbon buildup and are rigorously tested for defects through magnafluxing or pressure testing. Enhanced with new high-strength alloy, heat-treated iron-based valve guides, these components boast exceptional wear resistance that surpasses original materials. Each guide features a specialized spiral groove designed to optimize lubrication, enhancing performance during engine operation.

Precision is key in the remanufacturing process, as guides are diamond honed to exact specifications, ensuring consistency across each component. The addition of new premium valve seat inserts made from a true nickel-based non-magnetic material ensures durability in extreme conditions. A multi-angle valve job is performed to maximize airflow efficiency, utilizing advanced Serdi 100 technology for superior valve seating.

The surface of the heads is finely machined using CBN or diamond tooling, tailored to meet different head gasket specifications, particularly the requirements of MLS gaskets. Once the refurbishment is completed, heads are thoroughly jet washed and assembled with new valve seals and springs, ensuring impeccable quality.

Sold in pairs, these remanufactured heads are converted from LBZ/LMM cores while requiring LBZ/LMM glow plugs for optimal functionality. To qualify for full core credit, returned heads must be in reusable condition, free from cracks or excessive wear. Experience unmatched power and reliability with the Industrial Injection PDM-LLYSH remanufactured heads, engineered for longevity and peak performance.