5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

identifying heads

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Old 12-21-2007, 10:12 AM
  #1  
my77project
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Default identifying heads

Hey, the engine I got has this stamped on the heads under the vlave covers.

8D21

and on the outside of the heads it has an "S" stamped. Anyone know what heads they are? I'm at a loss.

Thanks
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Old 12-21-2007, 10:35 AM
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Joel5.0
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Default RE: identifying heads

8D21 is the date code = year 8 april 21...... if you have E7 heads, it would be April 21, '88..... need to know the casting number, 4th. and 5th. photos.
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Old 12-21-2007, 11:21 AM
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mjr46
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Default RE: identifying heads

ORIGINAL: my77project

Hey, the engine I got has this stamped on the heads under the vlave covers.

8D21

and on the outside of the heads it has an "S" stamped. Anyone know what heads they are? I'm at a loss.

Thanks
casting numbers if they are latemodel heads will be on the side the cumbustion chambers are on and be by an outer intake runner on the underside and start something like this e7.......
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Old 12-21-2007, 04:15 PM
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my77project
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Default RE: identifying heads

in other words...I can't see them unless I pull the heads off...which I'd rather not for the time being. oh well...
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Old 12-21-2007, 08:09 PM
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Joel5.0
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Default RE: identifying heads

ORIGINAL: my77project

in other words...I can't see them unless I pull the heads off...which I'd rather not for the time being. oh well...
Nope..... remove intake, use a small mirror, a rag, and a flashlight....... no need to remove the heads......
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