Better Heads?
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Freshman User
Joined: Sep 2006
Posts: 43
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Better Heads?
Currently I have 92 used motor in my 94 stock turbo truck. Head gaskets are leaking oil from every angle. The original motor dropped a rod but didnt touch the head. When I change the head gaskets which set of heads should I use. It would be nice to use the 94 heads so I could surface the head and grind the valves before the job even starts. Also I will likely port the heads I use.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
To answer that question correctly you will have to examine the heads very closely, look for cracks between the valves and around the precup. If you see none I would still have them magnafluxed before I spent money rebuilding them.
Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
If you plan on having the heads done over ensure the shop does them to ........ AERA/Navistar specs or they will be useless. Don't ask me how I know ok.......
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"
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"
