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1. 

   Why do Aftermarket HG's Blow?

   The oem copper washers have a thermal expansion coefficient of 17e-6 ratio/degC and the steel is like 12e-6. That means the copper expands 33% more than the steel for a given temperature increase. The little rubber rings on my after-market gasket just don't work like the oem copper rings and...

   • Words: 62
   • wengejor
   • Post #12
   • Apr 8, 2008
   • Forum: 60-Series Wagons
2. 

   Why do Aftermarket HG's Blow?

   https://forum.ih8mud.com/60-series-wagons/209119-headgasket-ccot-vs-toy.html this was my experience, so far so good with the oem gasket.

   • Words: 26
   • wengejor
   • Post #6
   • Apr 4, 2008
   • Forum: 60-Series Wagons