Shaved head problems 7.3
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New User
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Shaved head problems 7.3
Hey Ya'll,
Need advice, quick. Would shaved heads for a 7.3 idi non powerstroke cause the intake manifold bolts to not line up with the heads? Is there any fix for this situation? Not sure how much surface was milled off the heads. Thanks for the help.
Need advice, quick. Would shaved heads for a 7.3 idi non powerstroke cause the intake manifold bolts to not line up with the heads? Is there any fix for this situation? Not sure how much surface was milled off the heads. Thanks for the help.
Post Fiend
Joined: Nov 2003
Posts: 21,285
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From: Nutter Fort, WV
Are you sure the valley pan is in the correct location for the bolts to line up?
Since there are reliefs in the pistons for valve clearance, if the heads were shaved enough for the manifold bolts to not line up, I would be concerned about the valves clearing the pistons.
If that is not a issue, you can have the intake to head surface milled on the intake to get the holes back in line.
The intake holes have some room for alignment, if it will not go they must have taken a bunch off the heads.
Since there are reliefs in the pistons for valve clearance, if the heads were shaved enough for the manifold bolts to not line up, I would be concerned about the valves clearing the pistons.
If that is not a issue, you can have the intake to head surface milled on the intake to get the holes back in line.
The intake holes have some room for alignment, if it will not go they must have taken a bunch off the heads.
Post Fiend
Joined: Nov 2004
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From: Manitoba
I sure hope the shop was an AERA affiliate or you may have got more then you bargained for....
Per AERA specs:
Stem to guide clearance (intake & exhaust): .0013" - .0055"
Valve height (measured from top of valve to "deck" height)
Intake: .042" - .054" Exhaust: .051" - .063"
Minimum head thickness (from "deck" to valve cover surface): 4.7950"
The head thickness is a MAJOR concern, if they shave too much off.
Try lifting the intake a bit then threading the bolts in.........
Per AERA specs:
Stem to guide clearance (intake & exhaust): .0013" - .0055"
Valve height (measured from top of valve to "deck" height)
Intake: .042" - .054" Exhaust: .051" - .063"
Minimum head thickness (from "deck" to valve cover surface): 4.7950"
The head thickness is a MAJOR concern, if they shave too much off.
Try lifting the intake a bit then threading the bolts in.........
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Originally Posted by PLC7.3
I sure hope the shop was an AERA affiliate or you may have got more then you bargained for....
Per AERA specs:
Stem to guide clearance (intake & exhaust): .0013" - .0055"
Valve height (measured from top of valve to "deck" height)
Intake: .042" - .054" Exhaust: .051" - .063"
Minimum head thickness (from "deck" to valve cover surface): 4.7950"
The head thickness is a MAJOR concern, if they shave too much off.
Try lifting the intake a bit then threading the bolts in.........
Per AERA specs:
Stem to guide clearance (intake & exhaust): .0013" - .0055"
Valve height (measured from top of valve to "deck" height)
Intake: .042" - .054" Exhaust: .051" - .063"
Minimum head thickness (from "deck" to valve cover surface): 4.7950"
The head thickness is a MAJOR concern, if they shave too much off.
Try lifting the intake a bit then threading the bolts in.........
Senior User
Joined: Nov 2004
Posts: 315
Likes: 0
It sounds like the heads are to thin. Before you go any further check out the head thickness (previous post gives the specs). If the head has been 'shaved' to much you will bend valves, damage pistons etc. Are the heads torqed down, with the vave train installed? if so turn engine over by hand and see if you have any valve clearance problems.
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