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coolant degas bottle overflow

3K views 7 replies 5 participants last post by  amdriven2liv 
#1 ·
noticed some dry white residue on coolant overflow bottle. any ideas on what this could be? flushing radiator this weekend.
 
#2 ·
There are a few things. EGR cooler is ruptured or the head gaskets.

Any other signs or symptoms? Do you tow heavy/frequently?

Look for white smoke out the exhaust on startup or during acceleration/driving.
 
#4 ·
Clean the residue off and see if it happens again. Sometimes the pressure will cause coolant to blow out the cap (15 psi I think) if coolant blows out frequently could be egr issue could be head gaskets.
 
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