Head Machining Question - Ford Powerstroke Diesel Forum
 
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post #1 of 7 Old 12-15-2011, 10:27 PM Thread Starter
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Head Machining Question

I recently went to a Cylinder head machining shop in town which apperently is a reputable place. I asked them what specs they machine the heads to?
(because from reading on here they are NOT supposed to take off more than .008")

Well their answer to me was, "IT Doesn't matter because we re-seat the valves after milling."
Im no genius, but I think that something is wrong...
Could the techs please chime in and help me understand this?
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post #2 of 7 Old 12-16-2011, 05:05 AM
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How to Machine the 6.0

Thie should help.
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post #3 of 7 Old 12-20-2011, 02:20 PM Thread Starter
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Thank you,
That is an awsome write up, but I couldn't understand what is the max that can be milled off before the heads are not useable anymore?
Sorry, I am still a newbie at this!
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post #4 of 7 Old 12-20-2011, 02:28 PM
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Minimum head thickness spec is 95mm (3.74 inches).

I attached a pdf file that has all the specs you will need for the heads. Head specs start at the bottom of page 2.
Attached Files
File Type: pdf SPECS.pdf (164.9 KB, 361 views)
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post #5 of 7 Old 12-20-2011, 02:42 PM
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Cutting the valve seats deeper will only make the problem worse. Find a better shop to do the work-one that understands and works on the powerstroke, and knows what type of finish is required for MLS gaskets!



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post #6 of 7 Old 12-20-2011, 09:29 PM
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Recessing the valves can save an otherwise dead head but there is still a limit to what is reasonable. Taking .0012 off and recessing the valves .006 isn't too radical. Taking .020 or more is a different thing altogether.
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post #7 of 7 Old 12-21-2011, 07:04 AM Thread Starter
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Quote:
Originally Posted by PGreenSVT View Post
Recessing the valves can save an otherwise dead head but there is still a limit to what is reasonable. Taking .0012 off and recessing the valves .006 isn't too radical. Taking .020 or more is a different thing altogether.
Thank you very much!
That all makes sense now.
These guys apparently are doing most of the head work in town and they said that they have had no problems with their work.

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