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06-05-2015, 01:28 PM
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#1 |
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Registered User
Join Date: Jul 2004
Location: Lomita, Ca
Posts: 1,225
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just milled my 292 cylinder head
Hey everyone just thought I would share. I brought my 292 straight 6 head into work today to just put in the parts washer. Well, as a machinist with my own shop I couldn't resist. I first checked the head for squareness and found it was about .004 out. So, I decided to mill the head down until it cleaned up which was about .005 depth and then I couldn't resist and took it down another .025 for a total of .030. Should give me a small bump in compression and give me a nice flat surface for my previously leaking head gasket. For anyone interested this was done with a 12 flute face mill. Cat 40 taper. On a sharp bed mill with power feed. 390 rpm and about 7 inches per min feed. .005 finish pass. Ill find out how it works in a few weeks...
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06-05-2015, 01:32 PM
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#2 |
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Registered User
Join Date: Jul 2004
Location: Lomita, Ca
Posts: 1,225
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Re: just milled my 292 cylinder head
Couple pics
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06-05-2015, 01:47 PM
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#3 |
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Six in a row makes it go...
 
Join Date: Mar 2009
Location: Vacationland: Maine
Posts: 1,346
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Re: just milled my 292 cylinder head
Yeah - those inline heads like to warp a wee bit. I keep looking at those LPG pistons to bump the compression up a little too.
__________________
67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce |
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06-05-2015, 04:06 PM
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#4 |
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Registered User
Join Date: Mar 2013
Location: Story, Wyoming
Posts: 641
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Re: just milled my 292 cylinder head
You think with 2 passes she's guna stay flat? The shop I work in we face one of our products we make with an 8 flute facing bit and always end with a small step where the two a passes meet.
__________________
Well that didn't go as planned. 1965 k20 buikd thread: http://67-72chevytrucks.com/vboard/s...=628346&page=6 |
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06-05-2015, 04:59 PM
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#5 |
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Registered User
Join Date: Jul 2004
Location: Lomita, Ca
Posts: 1,225
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Re: just milled my 292 cylinder head
No one said I did two passes. For your information I did 5 total passes. Last one was .005
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06-05-2015, 05:01 PM
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#6 |
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Registered User
Join Date: Jul 2004
Location: Lomita, Ca
Posts: 1,225
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Re: just milled my 292 cylinder head
And afterwards I indicated the head from end to end, stylus did not move. Put on the granite square and also used a straight edge and its dead nuts now
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06-05-2015, 05:33 PM
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#7 |
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Six in a row makes it go...
Join Date: Mar 2009
Location: Vacationland: Maine
Posts: 1,346
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Re: just milled my 292 cylinder head
Gonna touch the manifold faces too?
__________________
67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce |
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06-05-2015, 05:53 PM
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#8 |
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Registered User
Join Date: Jul 2004
Location: Lomita, Ca
Posts: 1,225
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Re: just milled my 292 cylinder head
Shaky I did a cleanup on manifold face as well. Also put on a fresh coat of paint. Ready to get this thing installed and see how it runs
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06-05-2015, 05:54 PM
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#9 |
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Registered User
Join Date: Mar 2013
Location: Story, Wyoming
Posts: 641
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Re: just milled my 292 cylinder head
Very nice! I didn't meen to soy d like I was being judgmental man. Sorry if it came across that way. Nice work again.
__________________
Well that didn't go as planned. 1965 k20 buikd thread: http://67-72chevytrucks.com/vboard/s...=628346&page=6 |
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06-05-2015, 06:16 PM
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#10 |
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Registered User
Join Date: Jul 2004
Location: Lomita, Ca
Posts: 1,225
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Re: just milled my 292 cylinder head
No worries mattbert. Thanks for the comments
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06-05-2015, 09:14 PM
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#11 |
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Registered User
Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,384
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Re: just milled my 292 cylinder head
Looks nice! Outta seal up well now. With the head shaved that much you should see about 8.5.1....maybe a little less. But you should feel a wee bit a difference anyhow. lol Have fun with it man. Heck since your a machinist you should put in bigger valves and lump ports.
__________________
1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643 1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056 My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw |
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06-05-2015, 11:16 PM
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#12 |
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Registered User
Join Date: Jul 2010
Location: MD
Posts: 1,937
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Re: just milled my 292 cylinder head
 Looks good. Don't forget new freeze plugs while you are at it. If I had a dollar for every one of these I have milled. Use to hate when customers brought in the integral heads. Don't see them much anymore which is fine by me.
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