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6.7L Power Stroke Diesel 2011-current Ford Powerstroke 6.7 L turbo diesel engine

Loose head bolt

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Old Dec 28, 2023 | 04:00 PM
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Loose head bolt

I was tearing into my 2014 6.7 to locate a coolant leak that I thought was from the crossover gasket when I saw that this head bolt directly behind the driver side crossover mount was loose, wasn't even finger tight. There was a good amount of build up around it and the leak looks like it is coming from the bolt and possibly the head in that area. Does anyone know if this is safe to just thread back in and if so what the torque requirement is?
 
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Old Dec 28, 2023 | 06:10 PM
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I would be dumb enough to try. What are you going to loose? If it works you are back running,if it still leaks you will be doing a tear down and head job and gasket anyway.
 
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Old Dec 29, 2023 | 02:07 AM
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Originally Posted by Just Chilling
I would be dumb enough to try. What are you going to loose? If it works you are back running,if it still leaks you will be doing a tear down and head job and gasket anyway.
And check the other bolts at the same time.
 
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Old Dec 29, 2023 | 02:18 AM
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those are torque to yield bolts do not reuse or retorque,
 
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Old Dec 29, 2023 | 07:38 AM
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Originally Posted by charlie g
those are torque to yield bolts do not reuse or retorque,
I was trying to research that but obviously didn't do that good of a job...

Does that mean those bolts actually are designed to stretch when the final torque is applied? Not knowledgeable on this topic.
 
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Old Dec 29, 2023 | 09:51 AM
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Yes, they stretch. Generally you torque them to 35lb then maybe say 60 or so then rotate them 90degrees with out stopping or jerking. then another 45degrees. Also I believe you are supposed to lubrcate it with clean oil. Every manufacturer has their own range and procedures. Been a while since I have done it.

All I know is it makes a man out of you on a big Diesel engine.
 
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Old Dec 30, 2023 | 03:35 AM
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just never reuse they tend to break,
 
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Old Dec 30, 2023 | 08:02 AM
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I would buy a new one but I bet you are buying a complete set. Might as well because I would say 75% chance you are doing a head gasket on that side.
 
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Old Dec 31, 2023 | 06:23 PM
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doesnt look like the one on the left has any threads in it....check that out...might need a heli-coil...or tap to go to the next size.
 
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