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Inside Sealing

GM 6.6L DURAMAX DIESEL EDITION

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SIMPLIFYING HEAD GASKET SELECTION

APPLICATIONS:

Chevrolet/GMC ¾- and 1-Ton Trucks & Vans 6.6L 402 OHV V8 Turbo-Diesel 103mm Bore

PROBLEM: COMPLAINTS RELATED TO REPLACEMENT HEAD GASKETS

Developed in partnership by General Motors and Isuzu, the GM 6 .6L Duramax turbo diesel is one of the most popular, powerful and reliable engines for a broad range of medium-duty applications . It can also be a time-consuming and somewhat risky challenge for engine repair professionals, who face a confusing array of engine variations and production head gasket designs.

Multi-layer-steel construction is the one common characteristic of all five OE head gasket versions . Beyond the proven benefits of MLS technology, however, things get a lot more complex. GM and Isuzu have used two different MLS designs over the years: the first, from 2001-04 model years; then another for 2005 and newer engines. Within each of these base designs are three additional gasket grades or thicknesses. To further complicate matters, engine professionals also must choose from two separate gasket thicknesses for engines that have either been overbored or overbored and deck milled.

To help the engine professional identify these gasket variations, the OEM uses a "hole and slot" system. (See fig .1)

Fig1. - Gasket Variations

SOLUTION: FEL-PRO® PERMATORQUE® MLS REPLACEMENT HEAD GASKETS- 2 THICKNESSES COVERING ALL REPAIR NEEDS

Federal-Mogul Motorparts' Fel-Pro brand has introduced a highly streamlined portfolio of PermaTorqueMLS head gaskets for these applications. This new lineup not only helps the engine professional save time and prevent confusion, but also incorporates exclusive features that address the unique requirements of the aftermarket repair environment.

Federal-Mogul Motorparts now offers two designs of Fel-Pro PermaTorque MLS gaskets that cover all grades for all repair needs for 6.6L Duramax turbo diesel engines.


26401PT
FEL-PRO #26401PT (LH) AND 26402PT (RH)

Accommodate all model years as well as OE grades "A," "B" and "C" and overbored blocks

26405PT
FEL-PRO #26405PT (LH) AND 26406PT (RH)

.010-inch thicker gaskets accommodate blocks that have been overbored and deck milled (all grades & model years)


THE AFTERMARKET-ENHANCED FEL-PRO PERMATORQUE MLS DESIGN

These Fel-Pro PermaTorque MLS replacement head gaskets feature several design and material enhancements that are unavailable through OE or other aftermarket replacement gaskets:

  • Exclusive blue aftermarket MLS coating
    Accommodates 60 RA and higher surface finishes for superior sealability
  • Laser-welded "stopper" layer
    Seals the peak cylinder pressures often encountered in these engines
  • Dyna-proven design
    Each Fel-Pro PermaTorque MLS gasket must pass exhaustive dynamic testing before release to the repair market
gm-66l-duramax-diese-torque
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