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.

why is one valve clean and the others burnt looking?

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Old 12-16-2006, 12:43 AM
  #21  
ZachW04Stang
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Default RE: why is one valve clean and the others burnt looking?

It looks like that cylinder was steam cleaned with some coolant. When you blow a head gasket thats how it looks.
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Old 12-16-2006, 12:46 AM
  #22  
grabbem88
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Default RE: why is one valve clean and the others burnt looking?

also the only way to know if coolant got by is to call C.S.I.
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Old 12-16-2006, 12:48 AM
  #23  
grabbem88
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Default RE: why is one valve clean and the others burnt looking?

shoot just realized that you are juicing that car...i bet money that the head raised enough for coolant to get by

and yes coolant from a blown hg will make a car sound/feel like it's missing
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Old 12-18-2006, 04:11 AM
  #24  
hot85fifty
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Default RE: why is one valve clean and the others burnt looking?

Im Putting the heads on my new motor tomorrow. Is there anything that i con do to help prevent this from happening again? whet if it is a craacked head? how could i tell and what could i do about it? are the heads junk if its cracked? what would happen if this problem happens on the new motor and i dont catch it?

My neighbor has a theory about what happened with that cylinder. He thinks that the one cylinder was not getting spark or wasn't getting spark all the time, so that every time the valves open it doesnt take in as much fuel and all the fuel that didnt get taken got distributed to the other cylinders making them run richer. is that possable? or does he not know what he is talking about? he is just guessing anyway.
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Old 12-18-2006, 06:19 AM
  #25  
w8less
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Default RE: why is one valve clean and the others burnt looking?

i think the nitrous could have been blowing out the spark.
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Old 12-18-2006, 06:37 AM
  #26  
MACDRIVE
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Default RE: why is one valve clean and the others burnt looking?

Judging by the looks of those black intake valves, I'd say you're running rich as hell. The cylinder you suspect of not firing is the way they should all look like.
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