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Old Jan 25, 2008 | 08:22 PM
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Default vacuum diagram

Does anyone have a vacuum diagram for an 04 civic si..I believe i have a vacuum leak somewhere and am trying to locate it..thanks in advance
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Old Jan 25, 2008 | 09:45 PM
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Default Re: vacuum diagram (lowered94accord)

http://www.slhondaparts.com
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Old Jan 26, 2008 | 12:56 PM
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Default Re: vacuum diagram (Hawkze_2.3)

I didnt see a vacuum diagram on there at all man
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Old Jan 26, 2008 | 03:01 PM
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Default Re: vacuum diagram (lowered94accord)

Well, it looks like they're spread out a little based on what that particular hose is for...





etc... What do you need it for specifically?
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Old Jan 26, 2008 | 06:44 PM
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Default Re: vacuum diagram (Hawkze_2.3)

There is a little thing on the head where the upper radiator hose runs to i believe its some kind of thermal valve or something..anyways it has one small coolant line running to it and a little port for a vacuum and there is nothing going to it..i know its a vacuum line cuz i can feel it sucking..but i just cant figure out where it needs to be ran to...reason im asking is because im having bad idle problems and i thought this might be causing it
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Old Jan 26, 2008 | 08:25 PM
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Default Re: vacuum diagram (lowered94accord)

Any of these help?





I am no K20 expert, but it would be kinda odd to have a vacuum line going to the head....maybe someone else who knows what it is exactly will chime in.
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Old Jan 27, 2008 | 08:40 AM
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Default Re: vacuum diagram (Hawkze_2.3)

yes that bottom one is it...see where it runs into that little piece number 26 and then runs into the vacuum line number 16 thats what i need..and i need to know where it goes..at the end of that line it says B 1-5 what does that mean?
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Old Jan 28, 2008 | 07:24 PM
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Default Re: vacuum diagram (lowered94accord)

ok well i found out it runs to the stock intake..which i dont have..im turboed so do you think it would be necessary to drill and tap a whole into my piping and run the vacuum line or not?..i dont think it should matter but im not sure
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Old Jan 28, 2008 | 09:05 PM
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Default Re: vacuum diagram (lowered94accord)

Does it go to the valve cover (again I'm no K20 expert )? Generally there is a line from the intake to the head/VC to provide fresh filtered ait to the crankcase for the PCV system. If you connect that to your charge piping you're going to send boost into the crankcase...that would be bad.

Could you post a pic of the nipple you're talking about? If it's what I think it is it just needs filtered air, so you could just get a little breather filter and put it on there.
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Old Jan 29, 2008 | 06:11 PM
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Default Re: vacuum diagram (Hawkze_2.3)

yea thats exactly what im talking about and no boost wouldnt be good there lol..ill just put a little breather on there..and yes ill post a pic later tonight or tomorrow if i get a chance thanks man
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