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Message: [QUOTE="08Stroke, post: 881344, member: 12759"] I've searched around and found where many people have problems with leaking hoses and radiators, but I haven't seen much about degas bottle leaks other than in the case of a head gasket failure. I have done many tests to ensure that this is not a head gasket failure (no coolant in oil, no loss of coolant other than what has leaked down the side of the degas bottle, no excessive amounts of pressure under cap, etc etc). Back ground info of the truck and the problem. Purchased the truck in October 2013 with 77k on it. The truck had an AFe 4" straight pipe DPF delete and some cheap DPF 4.0 "chip" that told the computer there was no DPF filter. I added an S&B cold air and H&S tuner around 79k. At 80k did all routine 5k and 10k maintenance and also did EGR delete. I then flushed the coolant system about 5-6 times and went back with Zerex Red ELC coolant in about a 60-40 mix. I'm not sure if this is where I went wrong by not just sticking with Ford coolant, but shortly after deleting the egr and replacing coolant my degas bottle began to burp coolant. It happens so irregularly that I can't pinpoint what causes it. I can drive it hard, easy, towing or not and sometimes it will burp coolant and sometimes it won't. I replaced the cap with a Stant cap from advanced auto. It didn't help. It still leaks down the bottle from around the cap. Coolant temps stay around 190-192 cruising and rarely get to 200* even when towing or passing/getting on it. I'm stuck and have no clue what to do next. I've got a good bit of money tied up in this Zerex coolant (thinking it was better than OEM) but I'm about to go to ford and have them flush the system and replace with Ford coolant to see if that may be an issue. Do I need a new Degas bottle? Has anyone else had this problem? I apologize for the long post, but any help is greatly appreciated! [/QUOTE]