GM Remanufactured Heads For 2004.5-2005 LLY 6.6L Duramax Industrial Injection

$1,985.46 CAD

Ships within 24-48 hours. Pickup available upon request.
SKU: PDM-LLYSH-GHJV Categories: ,

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.

Additional information

Weight 80.00 lbs
Dimensions 22.00 x 12.00 x 8.00 in
Country of Origin

USA

Sold As

Each

Availability

Available

Universal

No

Warranty 1 Year Warranty
Make From Year To Year Model Sub
Chevrolet 2004 2005 Silverado 2500 HD -
GMC 2004 2005 Sierra 3500 -
Chevrolet 2004 2005 Silverado 3500 -
GMC 2004 2005 Sierra 2500 HD -
Chevrolet 2004 2005 Silverado 3500 LS
Chevrolet 2004 2005 Silverado 3500 LT
GMC 2004 2005 Sierra 3500 SLE
GMC 2004 2005 Sierra 2500 HD SLE
GMC 2004 2005 Sierra 2500 HD SLT
GMC 2004 2005 Sierra 3500 SLT
GMC 2004 2005 Sierra 2500 HD WT
GMC 2004 2005 Sierra 3500 WT
Chevrolet 2004 2004 Silverado 3500 WT
Chevrolet 2005 2005 Silverado 2500 HD LS
Chevrolet 2005 2005 Silverado 2500 HD LT

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