Uh-oh

[Dogman]

My degas cap went bad on mine over the weekend. Something to look at.

 

[shhorn68]

How did you determine the cap was bad? Mine seems to fit correctly but that may be because I do not know how it is supposed fit.

 

[Dogman]

10 buck and ez place to start first. I have found out that if the cap turns real ez and click real ez it my be going out. My new one is stiff and did not click real ez as the old one did. This is my observation on my truck.

 

[blood]

the new cap is great for a little while until it blows past 16 psi again.
the cap cant handle the heat after that to many times. a new cap is just masking the problem of a flash boil in the cooler or heads lifting.

 

[shhorn68]

Update

Got the flush done. I started by draining the radiator. It actually was clean and clear. I then added the VC9 and added distilled water and took it for a drive. When I got back I drained the radiator and this time it came out very dark. There was not in evidence of oil in it so I repeated the distilled water process three more times and it finally started coming out clean. Filled it back up with Motorcraft Gold but have not had a chance to drive it after the antifreeze fill up.

I have not had the chance to pull and clean the EGR valve so I am not sure how bad it is. I will try to take pics and post them when I do.

 

[shhorn68]

Another Update

Got around to pulling the EGR valve and cleaning it. The valve was dirty but not too bad and the build-up was dry. There was also no evidence of wetness, that I could see, in the intake. Having said all that, prior to pulling the EGR valve the coolant was puking out the degas bottle worse than ever. I hope it is just getting air out of the system but I am beginning to think I may have an oil cooler problem.

Time will tell. I hate to start messing with things if I do not know the problem becasue the truck runs GREAT! No smoke, even when cold, and no other evidence of a problem...at least to my eye.

BTW I was pulling a stock trailer loaded with calves each time it did the puking prior to the EGR cleaning.