resurfacing heads
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Junior User
Joined: Sep 2006
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From: Las Vegas, Nevada
resurfacing heads
Another newbie diesel question.
On gassers, common practice to check heads for flatness on mating surface, and to mill or deck heads to flat. Sounds like this could be a major issue with clearance being so close on these 6.9l diesels. Is this not a common occurance on these engines? If, in the process of having heads cleaned and valves, stems, seals replaced, head needs to be resurfaced, can you shim the heads in some way? What would be smartest way to correct this condition? Am I worrying about something inconsequential, or is there a common way to correct this condition? Appreciate your experience, Thanks all.
On gassers, common practice to check heads for flatness on mating surface, and to mill or deck heads to flat. Sounds like this could be a major issue with clearance being so close on these 6.9l diesels. Is this not a common occurance on these engines? If, in the process of having heads cleaned and valves, stems, seals replaced, head needs to be resurfaced, can you shim the heads in some way? What would be smartest way to correct this condition? Am I worrying about something inconsequential, or is there a common way to correct this condition? Appreciate your experience, Thanks all.
Posting Guru
Joined: Mar 2005
Posts: 1,701
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From: KY
I don't have heads resurfaced as a common practice. Warped heads, out of spec, isn't very common. Some people have heads surfaced because they don't look pretty and smooth. The important areas are at the fire dam and the coolant and oil passages which can have some bad spots. Gaskets will still seal.
Some motors have oversized head gaskets available and some don't.
It by no means is somethng you have to do and you are better off if you don't just because it look nice.
Remember this when you mill down a head or deck a block you retard the fuel timing.
Some motors have oversized head gaskets available and some don't.
It by no means is somethng you have to do and you are better off if you don't just because it look nice.
Remember this when you mill down a head or deck a block you retard the fuel timing.
Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
Check the AERA specs for head repairs.........these are on 7.3 check for 6.9 specs f needed.
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"
Please put a signature up with truck info.
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"
Please put a signature up with truck info.
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