View Full Version : co2 in coolant

02-09-2012, 12:54 PM
This is a follow up to my previous post "195 deg operating temp is this normal"
2005 long tall. Finally took it to the local shop, ran a co2 test and it showed co2 in the coolant. planning on removing head next week to check head and head gasket. Also swapped
egr valve from old one, same results. My question would be, is there any other way that
co2 can show up in the coolant? thanks