4720 Coolant Leak

   / 4720 Coolant Leak #21  
As I understand it the FEC had a as cast surface originally for the water pump mounting. Later version have a machined surface. The original cast FEC used a sealant but now there is a gasket available. There is no need to use sealant on the gasket but if you want to you can. The original sealant was a Hylomar product, with a yellow tint.
 
   / 4720 Coolant Leak #22  
Thanks for the replies. Got it back together and running. Hoping they’ve improved these water pumps so they will last better than 1300 hrs.
 

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