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Oil Cooler Seal and Gasket Kit, Duramax | 2001-2010

Merchant Automotive

$97.72
SKU:
10507
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The Merchant Automotive Oil Cooler Seal and Gasket Kit has the seals and gaskets needed to reseal and reinstall the engine oil cooler on 2001-2010 Chevy Silverado and GMC Sierra 2500HD and 3500HD trucks with the LB7, LLY, LBZ and LMM 6.6L Duramax diesel. Over time, the oil cooler seals and gaskets can start to leak, which can lead to failure of the oil cooler or other engine components. This kit includes the inlet and outlet gaskets, the oil cooler seals, and the water pump and coolant pipe seals that are disturbed when the cooler comes off.

Note: The oil cooler is not included. This kit is for resealing a cooler that has already been removed.

Features

  • Direct replacement seals and gaskets with OEM-like fitment
  • All-in-one kit with 10 seals and gaskets for the oil cooler job
  • Helps repair oil and coolant leaks at the oil cooler
  • Fits 2001-2010 LB7, LLY, LBZ and LMM Duramax

What's Included

Before You Order

  • 2001-2004 original coolers: these used a flat metal gasket where the cooler separates. This kit does not replace that gasket, so the cooler should be replaced.
  • Newer style oil cooler: if your truck has the newer style cooler, you may also need the Oil Cooler To Block Seal.
  • Heater outlet pipe seal: this seal fits 2007.5-2010 LMM trucks. Earlier trucks will not use it.

Symptoms of a Bad or Failing Duramax Oil Cooler

The oil cooler is a vital part of your Duramax oil system, and a failure can cause serious engine damage. Watch for these symptoms:

  • Oil leaking from the cooler area
  • Coolant leaking from the cooler area
  • Oil leaking into the cooling system
  • Coolant leaking into the oil system

These symptoms can point to other problems, so it is always a good idea to test the cooler and inspect the oil system for any signs of metal or coolant.

Installation Tips

  • Clean all sealing surfaces on the cooler, block and rear cover before installing the new gaskets.
  • Replace every seal and gasket that is disturbed during the job.
  • Refill the cooling system and check the oil and coolant for cross-contamination after installation.

Related Parts

Frequently Asked Questions

Is the oil cooler included?
No. This kit has the seals and gaskets to reseal and reinstall your cooler. For a new cooler, see the Engine Oil Cooler Assembly.

Can I reseal my 2001-2004 original oil cooler with this kit?
No. Original 2001-2004 coolers use a flat metal gasket where the cooler separates, and this kit does not replace it. The cooler should be replaced.

Do I need the Oil Cooler To Block Seal?
If your truck has the newer style oil cooler, you may also need the Oil Cooler To Block Seal.

Will this kit fit my 2011-2016 LML?
No. For 2011-2016 trucks, see the 2011-2016 Oil Cooler Seal and Gasket Kit.

For warranty information or to submit a claim, see our Warranty Form.

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