I HAVE A 2008 F250 6.4. IT IS BUILDING EXCESSIVE PRESSURE IN DEGAS BOTTLE AND ANTIFREEZE IS COMING OUT FROM UNDER CAP. ANY IDEAS?

 

Replace your cap for 13 bucks and check in.

Denny

 

get a 15 dollar hydrometer and check the viscosity of the coolant.

 

There have been updates to the Degass bottle, if you take a picture from the front we can tell you if they have been done. Coolant lvl is very important ,make sure the coolant is at the proper lvl cold. The pressure caps should be replaced every other year max, there cheap insurance to make sure the cap is within specs. I would start hear, also if you can provide any other information, does it do under normal driving, towing, and additional information helps.