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DmaxStore OE LLY Duramax Head Gasket Replacement Package
DmaxStore OE LLY Duramax Head Gasket Replacement Package DmaxStore OE LLY Duramax Head Gasket Replacement Package DmaxStore OE LLY Duramax Head Gasket Replacement Package DmaxStore OE LLY Duramax Head Gasket Replacement Package DmaxStore OE LLY Duramax Head Gasket Replacement Package

DmaxStore OE LLY Duramax Head Gasket Replacement Package

$614.95
Availability: In Stock

Available Options

* Add Head Bolts/Studs:



* Add 8 Glow Plugs:



* Add Thermostats:




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WARNING: Cancer and Reproductive Harm - p65warnings.ca.gov
Part#: OE-LLY-HG

DmaxStore OE LLY Head Gasket Replacement Package
Fits 2004.5-2005 Chevy/GMC 2500HD/3500HD

Part# OE-LLY-HG

This kit contains the necessary Genuine OE Manufacturer parts you will need to replace both head gaskets on your LLY Duramax.

Includes:

  • 1 x Genuine GM Head Gasket Install Kit Part# 98403365
  • 1 x Genuine OE Manufacturer Left Head Gasket Part# DMAX-7785 (C-Series)
  • 1 x Genuine OE Manufacturer Right Head Gasket Part# DMAX-7788 (C-Series) 
  • DmaxStore Exclusive: 8 x Genuine Bosch injector o-rings and copper washers
  • DmaxStore Exclusive: Bosch injector o-ring pn: F OOE 200099
  • DmaxStore Exclusive: Bosch copper washer pn: F OOR J01 086

​Optional:

  • Genuine GM Thermostats
  • Mishimoto Thermostats
  • MAHLE Head Bolts
  • ARP Pro Series Head Studs
    • ​Recommended over the MAHLE Head Bolts, these are a superior replacement for the head bolts and are rated at 220,000 psi tensile strength.

 

Tech tip: Installing head gaskets on your Duramax is very technical and labor intensive. You should have strong mechanical skills to complete this job, 30-35 hours should be allocated. It is highly recommended to add an ARP head stud kit. Other repairs such as water pump and injectors should be considered since you will have easy access at this time. We use and recommend Genuine OE Manufacturer C series gasket because it is the thickest of the 3 available. Valve adjustments are not always necessary but should be checked.

DmaxStore Note: This is also a good time to replace your glow plugs. The glow plugs may need replacement due to coolant contamination. If your glow plugs haven't been replaced recently, there is a slim chance they make break off in the cylinder head during removal. It is much easier to extract a broken glow plug with the cylinder heads off.

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