7.3 head
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3rd Gear
Joined: Apr 2023
Posts: 3
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7.3 head
I replace my head with a junkyard head. After setting the valves and getting it worked on by the machine shop I noticed what appears to be a hairline crack. I'm not 💯 sure that it's a crack or casting mark. I think that whatever it is it shouldn't be a problem.
Laughing Gas
Joined: May 2024
Posts: 908
Likes: 290
From: E TN
Not sure what machine work has been done. Did the machine shop pressure check the heads? Did they install the cups? What did they recommend?
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Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
Isn't the deck directly opposite of what we're looking at? If the head isn't installed flip it over look at the other side. If there's no hint of even a shadow of what we're seeing on this side on the other side, it may not be conclusive but, it'd go a long ways toward easing my nerves
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Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
I thought he said the cups are already in place. If so the cup would have to come out to access the questionable area. Of course that is easy enough if the head is on the bench and the price of 1 new cup is nothing compared to what you'd be looking at if it's bad and goes into service.
Lead Driver
Joined: Jun 2013
Posts: 5,647
Likes: 891
From: north of Minneapolis, MN
I thought he said the cups are already in place. If so the cup would have to come out to access the questionable area. Of course that is easy enough if the head is on the bench and the price of 1 new cup is nothing compared to what you'd be looking at if it's bad and goes into service.
Personally, I'm not going through the effort it takes to install it without Magnafluxing it.
Hotshot
Joined: Dec 2012
Posts: 11,271
Likes: 1,654
From: Las Cruces New Mexico
I learned the hard way on my rebuild there was a crack up in the glow plug hole, that wasn't visible and caused my engine to overheat and dump coolant into one of my cylinders.
I would give it a hard pass on that head and find another one, or you'll find yourself tearing into your engine again like I did.
I would give it a hard pass on that head and find another one, or you'll find yourself tearing into your engine again like I did.
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