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Old 06-15-2011, 03:34 PM   #1 (permalink)
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Default Differentiate between intake and exhaust valve springs?

I just recently purchased a disassembled y8 head and all the valve springs were tossed into one bag.

Now is there a way for me to figure out which one is the intake springs and which is the exhaust?

of course these are OEM springs, just in case anyone was wondering.

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Old 06-15-2011, 08:20 PM   #2 (permalink)
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Okay, I was able to notice a stupid light shade of red on 8 of the valve springs and from what finding out is that they are color coded for either intake or exhaust.

Ive tried searching about color coding for valve springs but came up with others asking the same thing but with no results. LOL.
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Old 06-15-2011, 08:21 PM   #3 (permalink)
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IIRC (could be wrong) red is exhaust
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Old 06-15-2011, 09:51 PM   #4 (permalink)
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Service manual has the info, even which end of the spring goes towards the head.

It's been a "long exhaust"ing day.
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Old 06-15-2011, 09:53 PM   #5 (permalink)
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iirc
red = exhaust
green = intake
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Old 06-15-2011, 09:59 PM   #6 (permalink)
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Quote:
Originally Posted by xylocramer View Post
IIRC (could be wrong) red is exhaust
Thanks

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Originally Posted by transzex View Post
Service manual has the info, even which end of the spring goes towards the head.

It's been a "long exhaust"ing day.
Ha! I didnt even realize to even look there. Thanks Bones.

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Originally Posted by cmgogo View Post
iirc
red = exhaust
green = intake

There is actually no green markings on the other valve springs hahaha. I only barely noticed the redish mark from me getting pissed off and almost throwing one then I noticed the blemish. LOL.
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Old 06-16-2011, 01:46 PM   #7 (permalink)
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And here I was thinking they were all the same. Shows you what I know.
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Old 06-16-2011, 02:35 PM   #8 (permalink)
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Does it matter? and what if the color is gone how would you tell? Size? Spring rate? etc..?
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Old 06-16-2011, 02:44 PM   #9 (permalink)
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Good luck Sammo!
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Old 06-16-2011, 02:54 PM   #10 (permalink)
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And here I was thinking they were all the same. Shows you what I know.
From my search of my answer yesterday, SOME aftermarket Valve springs are have the same rate. So your right on certain aspects

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Originally Posted by xile6 View Post
Does it matter? and what if the color is gone how would you tell? Size? Spring rate? etc..?
From an OEM stand point yes. It matters. As the Y8 intake valve springs are stiffer then those from the exhaust. How much stiffer? That is another question for another day =P

Oh and if the color markings are completely gone then id say...your SOL. LMAO.

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Good luck Sammo!
Thanks G! I seriously hope I get a decent amount of gains from this Frankenstein head work. Id be happy with a 10hp gain. LOL.
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Old 06-16-2011, 02:57 PM   #11 (permalink)
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blue is intake pretty sure
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Old 06-16-2011, 03:02 PM   #12 (permalink)
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I took a way closer look today in the sun and the colors are Green and Red, I'll look in the honda manual later on today to see which to face them and which one is which.
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Old 06-16-2011, 03:19 PM   #13 (permalink)
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thinking he gave ya different springs
im seeing blue , and brown for y8

green from the y7
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Old 06-16-2011, 04:07 PM   #14 (permalink)
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Grab a set your sure of from the jy? Or pop a vc off and see what colors they have
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Old 06-16-2011, 06:43 PM   #15 (permalink)
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thinking he gave ya different springs
im seeing blue , and brown for y8

green from the y7

HRMMM!. I do have a set of Y7 valve springs and also a set of JDM D15B valve springs. I shall go and inspect them...LOL. *need to spread some rep before whoring them to Ryan. LMAO*

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Grab a set your sure of from the jy? Or pop a vc off and see what colors they have
Well the color markings arent just on the side of the valve spring, they are actually on the underside of the spring so basically the under bedding of the valve spring. LOL ><
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Old 06-16-2011, 06:47 PM   #16 (permalink)
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Well the color markings arent just on the side of the valve spring, they are actually on the underside of the spring so basically the under bedding of the valve spring. LOL ><
Let's see... I think I remember some Z6 springs I have laying around having some markings on them.
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Old 06-16-2011, 07:28 PM   #17 (permalink)
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Just finished looking thru the Honda Service Manual for the 96-98 Civic. There are NO information about valve spring color coding or anything with color mentioned with the valve spring BUT it does state how to place them. The end with the closest wound coil faces the cylinder head =P


Also currently at the moment uploading the pictures that I took of all the valves spring that are to my disposal. Which are a set of Y7 valve springs and JDM D15B valve springs and of course these "Y8" valve springs *yet to be proven*


JDM D15B Intake Valve Spring


JDM D15B Exhaust Valve Spring


Y7 Intake Valve Spring


Y7 Exhaust Valve Spring



Mysterious "Y8" Valve Spring
Red:

Green:




So, anyone out there that can confirm what valve springs these are?

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Old 06-16-2011, 09:16 PM   #18 (permalink)
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the manual does state how to tell which springs are which.

Free, yet lengthy.
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Old 06-16-2011, 09:56 PM   #19 (permalink)
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You super sure bones?! Either my reading comprehension is down the shiter or it just isnt there. LOL. i'll eyeball it again at work.


Feels like your leading me on Bones. LMAO.
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Old 06-16-2011, 11:20 PM   #20 (permalink)
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Intake ones are stiffer
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