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Old 09-05-2009, 09:57 PM   #1
motoryder
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Default Valve stem seal color?

Quick question, which color valve stem seals(oem) go on which side? Black on exhaust side green on intake? Most recent build I just did a buddy of mine gave me some special viton seals to use and they are absolutely horrible, oil puking from almost every exhaust valve stem. I'm going to put some stock seals on and need to know which color for which valve.


Thanks,
-Mike
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Old 09-05-2009, 11:13 PM   #2
john 1badSTI
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green for intake black for exhaust
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Old 09-05-2009, 11:18 PM   #3
Burnout
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If you forget just look very closesly at the seal and it they will be marked, EX and IN.
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Old 09-06-2009, 06:08 AM   #4
motoryder
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Quote:
Originally Posted by john 1badSTI View Post
green for intake black for exhaust
That's what I thought as well.

But..........

Quote:
Originally Posted by Burnout View Post
If you forget just look very closesly at the seal and it they will be marked, EX and IN.
I'll be damned, you're right, thanks for clearing that up.

Last edited by motoryder; 09-08-2009 at 09:14 PM.
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Old 09-07-2009, 12:30 AM   #5
06rexwagon
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Quote:
Originally Posted by john 1badSTI View Post
green for intake black for exhaust
wrong. Factory service manual says gray for intake and green for exhaust

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Old 09-07-2009, 01:58 AM   #6
Storm
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He's not "wrong"...... Different years use different colors. My '00 EJ25/EJ22 FSM says black for intake and brown for exhaust.......

Jay
Quote:
Originally Posted by 06rexwagon View Post
wrong. Factory service manual says gray for intake and green for exhaust

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Old 09-07-2009, 09:15 AM   #7
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Quote:
Originally Posted by 06rexwagon View Post
wrong. Factory service manual says gray for intake and green for exhaust

+1
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Old 09-07-2009, 06:14 PM   #8
06rexwagon
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Quote:
Originally Posted by Storm View Post
He's not "wrong"...... Different years use different colors. My '00 EJ25/EJ22 FSM says black for intake and brown for exhaust.......

Jay
I didn't know that. Since he didn't say what car he has either of could be right.
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Old 09-07-2009, 06:18 PM   #9
kevinh211
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why does it matter which ones are used on the intake or exhaust valves?
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Old 09-07-2009, 10:34 PM   #10
06rexwagon
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why does it matter which ones are used on the intake or exhaust valves?
The exhaust one is designed to withstand more heat.
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Old 09-08-2009, 11:40 AM   #11
the suicidal eggroll
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Quote:
Originally Posted by 06rexwagon View Post
wrong. Factory service manual says gray for intake and green for exhaust

Same on my 05 STi, gray for intake and green for exhaust
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Old 09-08-2009, 01:38 PM   #12
Mechie3
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My 06 did green exh, gray intake. I didn't see the note at first in the FSM and put them on backwards. I though black..hmm..exhaust is black....ok. Had to take them all off and redo them.
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Old 09-09-2009, 12:16 AM   #13
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On most makes, the black goes on intake and the odd color on the exhaust.
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Old 02-09-2011, 11:04 PM   #14
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Just did some research on this myself, because using aftermarket parts for a budget HG job for a friend.

Most of the aftermarket kits come with Viton seals and don't seem to have different valve stem seals for intake and exhaust. Viton is typically more expensive and is unnecessary on the intake side. For an aftermarket parts vendor, I would imagine this small difference in the price is just passed on to the customer. For a bean counter at a major auto manufacturer, saving a tiny amount of money for an intake valve stem seal that's made out of nitrile (or something cheaper than Viton) can save hundreds of thousands, if not millions of dollars.

I suspect the only real difference in Subaru factory valve stem seals are the material. Intake does not need the heat resistance, hence does not need to be Viton. These links show that they are physically the same dimensions (although they have two different P/Ns - going to find out if the only diff is color):

http://keithtwitchel.net/part.php?pid=122-1180 (13207AA120 - intake)
http://keithtwitchel.net/part.php?pid=122-1181 (13211AA110 - exhaust)

Any thoughts?
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Old 04-30-2011, 03:04 AM   #15
benjileo
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Ok I bought an aftermarket engine gasket set and viton seals for my 97 jdm ej25d rebuild, with no mention of exhaust or intake on any seal. I see black springs on a brown or greenish base, and silver springs on a grey or silver base. I just don't want to find later that I put them on wrong. any input would be great.
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Old 07-31-2011, 11:35 AM   #16
HappyEeyore
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@benjileo - did you ever get feedback on this or figure this out ... I'm having the same problem ...
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Old 07-31-2011, 12:30 PM   #17
wrxsubiemod
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When I got my seals in they had in. On one color and ex. On another. Very small letters on top of the seals. These were oem replacements tho.
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Old 03-22-2012, 05:48 PM   #18
SubiSam
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There must be different size seals for different models. I grabbed some seals from the dealer that were lying around. Turns out the ones i used are bigger than the ones im putting in now. This was a costly mistake. Check those part numbers.
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