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Elring 778.190 Engine Coolant Pipe SealOE Quality 60-Day Returns
Part #: 778.190

Elring 778.190 Engine Coolant Pipe Seal

112 vehicles fit this part
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Fitment: Chevrolet and GMC, Express 2500, Express 3500, Savana 2500, Savana 3500, Sierra 2500 HD, Sierra 2500 HD Classic, Sierra 3500, Sierra 3500 Classic, Sierra 3500 HD, Silverado 2500 HD, Silverado 2500 HD Classic, Silverado 3500, Silverado 3500 Classic, and Silverado 3500 HD
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Not what you need? See all Engine Coolant Pipe Seal options

Engine Coolant Pipe Seal for Thermostat Housing

Elring 778.190 is an engine coolant pipe seal built as an O-ring for the thermostat area. With a 24.6 mm inner diameter and 2.4 mm thickness, it provides a precise sealing profile for upper thermostat coolant connections on select Chevrolet and GMC trucks and vans.

Use this seal when servicing the thermostat housing or upper coolant pipe on applications such as Chevrolet Silverado 2500 HD, GMC Sierra 3500, and Chevrolet Express 3500. Elring 778.190 is made for direct-fit sealing performance where coolant leaks can affect engine temperature control.

Key Features

  • Brand: Elring
  • Part number: 778.190
  • Engine coolant pipe seal for thermostat applications
  • O-ring shape for a secure sealing surface
  • Inner diameter: 24.6 mm
  • Thickness: 2.4 mm
  • Fitting position: Upper, Thermostat
  • Cross-reference: MAHLE B33276

Detailed Description

This Elring coolant seal is specified for upper thermostat sealing points and is used in cooling system service where a worn or flattened O-ring can allow seepage at the pipe-to-housing interface. The part number 778.190 is listed for a wide range of Chevrolet Express 2500, Chevrolet Express 3500, Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Savana 2500, GMC Savana 3500, GMC Sierra 2500 HD, and GMC Sierra 3500 HD applications. It also covers 2007 Silverado and Sierra Classic variants, making it a practical replacement for thermostat-related coolant sealing service on GM heavy-duty platforms.

This part cross-references MAHLE B33276 for the same application.

What It Helps Address

  • Coolant seepage at the thermostat housing or upper pipe connection
  • Loss of seal integrity from heat cycling and age
  • Drips or residue around the upper cooling system joint
  • Service issues during thermostat or coolant pipe replacement
  • Pressure loss at the sealing interface in the cooling system

Installation Notes and Tips

Inspect the sealing groove and mating surfaces before installation. Clean away old coolant residue, scale, and debris so the O-ring seats evenly. Verify the thermostat-side and upper-position application before assembly, and confirm the seal dimensions match the original part number 778.190 specification.

Quality Assurance

Elring is known for sealing-system components used in engine service, and this coolant pipe seal is built to support reliable fitment in thermostat applications. Confirm vehicle coverage against the listed fitment before ordering.

BrandElring
Part Number778.190
Fitting PositionThermostat
Fitting PositionUpper
Fitting PositionUpper,thermostat
Goods tariff number4016935010
Inner Diameter [Mm]24,6
ShapeO-ring
Thickness [Mm]2,4

This part fits 112 vehicles. Search below:

YearMakeModelDrive TypeLitersCylindersFuel TypePositionNotes
2016ChevroletExpress 2500RWD6.6LV8DIESELN/A
2016ChevroletExpress 3500RWD6.6LV8DIESELN/A
2016ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2016ChevroletSilverado 3500 HD4WD6.6LV8DIESELN/A
2016GMCSavana 2500RWD6.6LV8DIESELN/A
2016GMCSavana 3500RWD6.6LV8DIESELN/A
2016GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2016GMCSierra 3500 HD4WD6.6LV8DIESELN/A
2015ChevroletExpress 2500RWD6.6LV8DIESELN/A
2015ChevroletExpress 3500RWD6.6LV8DIESELN/A
2015ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2015ChevroletSilverado 3500 HD4WD6.6LV8DIESELN/A
2015GMCSavana 2500RWD6.6LV8DIESELN/A
2015GMCSavana 3500RWD6.6LV8DIESELN/A
2015GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2015GMCSierra 3500 HD4WD6.6LV8DIESELN/A
2014ChevroletExpress 2500RWD6.6LV8DIESELN/A
2014ChevroletExpress 3500RWD6.6LV8DIESELN/A
2014ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2014ChevroletSilverado 3500 HD4WD6.6LV8DIESELN/A
2014GMCSavana 2500RWD6.6LV8DIESELN/A
2014GMCSavana 3500RWD6.6LV8DIESELN/A
2014GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2014GMCSierra 3500 HD4WD6.6LV8DIESELN/A
2013ChevroletExpress 2500RWD6.6LV8DIESELN/A
2013ChevroletExpress 3500RWD6.6LV8DIESELN/A
2013ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2013ChevroletSilverado 3500 HD4WD6.6LV8DIESELN/A
2013GMCSavana 2500RWD6.6LV8DIESELN/A
2013GMCSavana 3500RWD6.6LV8DIESELN/A
2013GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2013GMCSierra 3500 HD4WD6.6LV8DIESELN/A
2012ChevroletExpress 2500RWD6.6LV8DIESELN/A
2012ChevroletExpress 3500RWD6.6LV8DIESELN/A
2012ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2012ChevroletSilverado 3500 HD4WD6.6LV8DIESELN/A
2012GMCSavana 2500RWD6.6LV8DIESELN/A
2012GMCSavana 3500RWD6.6LV8DIESELN/A
2012GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2012GMCSierra 3500 HD4WD6.6LV8DIESELN/A
2011ChevroletExpress 2500RWD6.6LV8DIESELN/A
2011ChevroletExpress 3500RWD6.6LV8DIESELN/A
2011ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2011ChevroletSilverado 3500 HD4WD6.6LV8DIESELN/A
2011GMCSavana 2500RWD6.6LV8DIESELN/A
2011GMCSavana 3500RWD6.6LV8DIESELN/A
2011GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2011GMCSierra 3500 HD4WD6.6LV8DIESELN/A
2010ChevroletExpress 2500RWD6.6LV8DIESELN/A
2010ChevroletExpress 3500RWD6.6LV8DIESELN/A
2010ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2010ChevroletSilverado 3500 HD4WD6.6LV8DIESELN/A
2010GMCSavana 2500RWD6.6LV8DIESELN/A
2010GMCSavana 3500RWD6.6LV8DIESELN/A
2010GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2010GMCSierra 3500 HD4WD6.6LV8DIESELN/A
2009ChevroletExpress 2500RWD6.6LV8DIESELN/A
2009ChevroletExpress 3500RWD6.6LV8DIESELN/A
2009ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2009ChevroletSilverado 3500 HD4WD6.6LV8DIESELN/A
2009GMCSavana 2500RWD6.6LV8DIESELN/A
2009GMCSavana 3500RWD6.6LV8DIESELN/A
2009GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2009GMCSierra 3500 HD4WD6.6LV8DIESELN/A
2008ChevroletExpress 2500RWD6.6LV8DIESELN/A
2008ChevroletExpress 3500RWD6.6LV8DIESELN/A
2008ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2008ChevroletSilverado 3500 HD4WD6.6LV8DIESELN/A
2008GMCSavana 2500RWD6.6LV8DIESELN/A
2008GMCSavana 3500RWD6.6LV8DIESELN/A
2008GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2008GMCSierra 3500 HD4WD6.6LV8DIESELN/A
2007ChevroletExpress 2500RWD6.6LV8DIESELN/A
2007ChevroletExpress 3500RWD6.6LV8DIESELN/A
2007ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2007ChevroletSilverado 2500 HD Classic4WD6.6LV8DIESELN/A
2007ChevroletSilverado 3500 Classic4WD6.6LV8DIESELN/A
2007ChevroletSilverado 3500 HD4WD6.6LV8DIESELN/A
2007GMCSavana 2500RWD6.6LV8DIESELN/A
2007GMCSavana 3500RWD6.6LV8DIESELN/A
2007GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2007GMCSierra 2500 HD Classic4WD6.6LV8DIESELN/A
2007GMCSierra 3500 Classic4WD6.6LV8DIESELN/A
2007GMCSierra 3500 HD4WD6.6LV8DIESELN/A
2006ChevroletExpress 2500RWD6.6LV8DIESELN/A
2006ChevroletExpress 3500RWD6.6LV8DIESELN/A
2006ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2006ChevroletSilverado 35004WD6.6LV8DIESELN/A
2006GMCSavana 2500RWD6.6LV8DIESELN/A
2006GMCSavana 3500RWD6.6LV8DIESELN/A
2006GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2006GMCSierra 35004WD6.6LV8DIESELN/A
2005ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2005ChevroletSilverado 35004WD6.6LV8DIESELN/A
2005GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2005GMCSierra 35004WD6.6LV8DIESELN/A
2004ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2004ChevroletSilverado 35004WD6.6LV8DIESELN/A
2004GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2004GMCSierra 35004WD6.6LV8DIESELN/A
2003ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2003ChevroletSilverado 35004WD6.6LV8DIESELN/A
2003GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2003GMCSierra 35004WD6.6LV8DIESELN/A
2002ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2002ChevroletSilverado 35004WD6.6LV8DIESELN/A
2002GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2002GMCSierra 35004WD6.6LV8DIESELN/A
2001ChevroletSilverado 2500 HD4WD6.6LV8DIESELN/A
2001ChevroletSilverado 35004WD6.6LV8DIESELN/A
2001GMCSierra 2500 HD4WD6.6LV8DIESELN/A
2001GMCSierra 35004WD6.6LV8DIESELN/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1608980094011602B33276

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.