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  #1  
Old 01-21-2014, 01:25 PM
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Another Head Gasket/Degas Cap Leak Thread...

I didn't want to high jack anyone's thread so I am starting one for my truck.

156K Miles. Bullet Proof all but studs and HGs...

Been running Xtreme Street tune by I.D.

I noticed my degas cap spewing a few weeks back, topped off the coolant and replaced the cap with a Stant brand cap. I noted yesterday my EOT was getting higher than normal and I thought it may have to do with 4" TB exhaust I had just done the day or two before, but there was the coolant all over the degas again...

With the old cap I also had a whine at deceleration, the new cap seemed to fix that... But apparently I am still getting over pressure and spewing coolant from the cap...

So, after a few hours of reading stickies and searching under the hood, I think I have found the issue... Passenter side head looks to have been leaking for some time. There is yellowish gunk, but not real wet to touch.

I also have a failing IC pipe boot or something else is leaking oil on top of the motor. I noted the oil under the pan but chalked it to the glow plugs...

Here are the pics. Does this seem like I am headed in the right direction? HG's and studs are in the future for me...

In the mean time, truck is back to stock tune and will be monitoring like crazy...
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Old 01-21-2014, 01:27 PM
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Pics of passenger side head
Another Head Gasket/Degas Cap Leak Thread...-imageuploadedbyag-free1390339613.503795.jpgAnother Head Gasket/Degas Cap Leak Thread...-imageuploadedbyag-free1390339624.623520.jpg

Pics if oil under IC tube boot
Another Head Gasket/Degas Cap Leak Thread...-imageuploadedbyag-free1390339658.157074.jpg

Thanks for any help!



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  #3  
Old 01-21-2014, 01:31 PM
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It's hard to make out in the pic but head gaskets generally don't leak externally on these trucks.
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Old 01-21-2014, 01:43 PM
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Quote:
Originally Posted by dhanna6powerstroke View Post
It's hard to make out in the pic but head gaskets generally don't leak externally on these trucks.
Good to know. I don't see puddling under the truck. I don't have odd color in exhaust...

I guess next step is research getting a psi gauge on the system.
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Old 01-21-2014, 01:46 PM
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Is it possibly leaking out of the heater hose where that valve is at and falling on top of the head and then running down?
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Old 01-21-2014, 01:55 PM
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What is the plug in the spot light in the first pic? That one has the same yellow crud around it. It that the heater hose?
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Old 01-21-2014, 01:57 PM
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Yeah, that's the valve and heater hose. It's actually there to block coolant flow to the heater core when A/C is on max so coolant flows to or through that valve all the time.
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Old 01-21-2014, 02:14 PM
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Oh gotcha. Maybe pull and inspect/replace these guys? Flush the system? It was flushed about 30k miles ago, not sure what coolant is in it now.


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Old 01-21-2014, 06:08 PM
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I'd get a pressure tester and pressurize the system and watch for it to leak.
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Old 01-21-2014, 06:45 PM
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I will see if a local parts store loans these testers out and go from there. Thanks!


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