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3800 Head/Block Flatness Specs by NoMoreRicers
Started on: 08-15-2013 08:52 PM
Replies: 5 (105 views)
Last post by: Lou6t4gto on 08-17-2013 01:41 PM
NoMoreRicers
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Report this Post08-15-2013 08:52 PM Click Here to See the Profile for NoMoreRicersClick Here to Email NoMoreRicersSend a Private Message to NoMoreRicersEdit/Delete MessageReply w/QuoteDirect Link to This Post
I'm going to buy a machinist's straight edge and check them out with my feeler gauge. I can't find the specs for how flat the decks of the heads and block have to be. Anybody?
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darkhorizon
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Report this Post08-16-2013 05:41 AM Click Here to See the Profile for darkhorizonSend a Private Message to darkhorizonEdit/Delete MessageReply w/QuoteDirect Link to This Post
they wont be in spec.. do your best getting the heads right and bolt them on.
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NoMoreRicers
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Report this Post08-16-2013 05:45 AM Click Here to See the Profile for NoMoreRicersClick Here to Email NoMoreRicersSend a Private Message to NoMoreRicersEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by darkhorizon:

they wont be in spec.. do your best getting the heads right and bolt them on.


I'm going to get the heads flattened/resurfaced and use ARP studs. What do you think about the block, how flat does it need to be? What would you recommend for gaskets, just Felpro with copper spray?
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darkhorizon
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Report this Post08-17-2013 03:59 AM Click Here to See the Profile for darkhorizonSend a Private Message to darkhorizonEdit/Delete MessageReply w/QuoteDirect Link to This Post
they wont be in spec.. do your best getting the heads right and bolt them on.
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DimeMachine
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Report this Post08-17-2013 10:18 AM Click Here to See the Profile for DimeMachineSend a Private Message to DimeMachineEdit/Delete MessageReply w/QuoteDirect Link to This Post
I would check it to make sure it is not real bad.

From Engine Builder. Flatness specifications vary depending on the application, but on most pushrod engines with cast iron heads, up to .003" (0.076 mm) out-of-flat lengthwise in V6 heads.

[This message has been edited by DimeMachine (edited 08-17-2013).]

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Lou6t4gto
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Report this Post08-17-2013 01:41 PM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
Really ? I checked mine out and they were "Dead on".
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