Welcome To Merchant Automotive—The Duramax Diesel Engine & Allison Transmission Performance Specialists You Can Count On!

Merchant Automotive Head Gasket Kit - LB7, Duramax | 2001 - 2004

$299.00 - $1,209.00

Valve Seal: Required

Head Bolts: Required

Head Gaskets: Required

Due to daily fluctuating stock levels, please call (616) 772-9551 for time sensitive orders.

Our Guarantees

Truck Expert a call away The fastest shipping lifetime customer support

Product Information

LB7  Duramax Head Gasket Kit

If you are replacing blown head gaskets or rebuilding an LB7 Duramax diesel engine, you are going to need quite a few parts to get the job done. A Duramax head gasket job is not a task for the average driver, so you will want to ensure you have all of the right components for your mechanic. Merchant Automotive has put together a complete LB7 Duramax Diesel engine head gasket kit to include everything you need to get the job done. Featuring OEM and performance parts, this kit will ensure that your LB7s head gaskets perform better than your factory gaskets did. This all-in-one kit will feature everything you need to replace the head gaskets in an LB7 Duramax diesel engine.


  • All In One Kit
  • Restores & Upgrades
  • OEM & Performance Parts Included


  • OEM/GM Gaskets
  • Thoroughly Researched Kit
  • Threadlocker Included

Symptoms Of A Blown Duramax Head Gasket

A blown head gasket can easily total out any vehicle, including a Duramax diesel engine equipped truck. However, an engine can be repaired with the correct parts and tools by someone who is any experienced mechanic. Some of the most common symptoms of a blown head gasket will include:

  • White Smoke Coming From Tailpipe
  • Unexplained Coolant Loss With No Leaks
  • Milky White Coloration Of The Oil
  • Engine Overheating
  • Coolant Bubbling In Radiator & Coolant Reservoir
  • Coolant Streaks Near Gaskets

What Is Included In The Kit?

  • (1) - Injector Cup O-ring Kit, LB7, 2001-2004 Duramax 16 Pack of GM 94051259
  • (1) - Fuel Line Banjo Seal at FICM, Duramax, 2 per package
  • (1) - Small LB7 Injector Return Line Seal, Duramax Pack of 3
  • (2) - LB7 Injector Seal Kit 2001-2004
  • (2) - Red Threadlocker
  • (1) - Upper Bypass Pipe Seal at Thermostat Housing, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
  • (1) - Bypass Pipe Seal, LB7 LLY LBZ LMM LML, 2001-2016 Duramax
  • (2) - Gasket - Exhaust Manifold To Up Pipe, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
  • (2) - Lower Valve Cover Gasket, LB7, 2001-2004 Duramax
  • (1) - RTV Sealant, High Temp, Aluminum, 2.8oz LB7 LLY LBZ LMM LML, L5P 2001-2019 Duramax
  • (2) - Injector Return Line Kit, LB7, 2001-2004 Duramax 1x 98065992 and 4x 97228933
  • (1) - Upper Radiator Pipe Seal, LB7 LLY LBZ LMM, 2001-2010 Duramax
  • (2) - Thermostat Housing Crossover At Head Gasket, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
  • (2) - Intake Pipe Seal, LB7 LLY, 2001-2005 Duramax
  • (1) - Turbo Inlet Gasket, LB7, 2001-2004 Duramax
  • (1) - Oil Fill Tube Seal, LB7 LLY LBZ LMM LML, 2001-2016 Duramax
  • (2) - Exhaust Manifold Gasket, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
  • (1) - Heater Pipe Seal, LB7 LLY LBZ, 2001-2007 Duramax

Reviews & Questions