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Old 12-25-2008, 07:19 PM   #1
Scooby Newbie
Member#: 112422
Join Date: Apr 2006
Location: niles illinois
Default hks bov leak?

i just noticed that my hks bov have air coming out of it...is this normal or is it a leak from the bov...this probably a dum quiestion too..which can explain why my car running rich most of the time in my 2004 rsti?
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Old 12-25-2008, 07:54 PM   #2
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Join Date: Dec 2008
Location: Coppell, TX
2002 WRX


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Old 12-25-2008, 08:16 PM   #3
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Join Date: Nov 2006
Chapter/Region: MAIC
Location: Delaware
2004 boosted saleen


yes you have a leak in it mine doesnt do that and it shouldnt.
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Old 12-26-2008, 01:17 AM   #4
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Location: niles illinois

yes ssqv...and i think then i found my intake or leak...thanx..will check it out or get another one..
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Old 12-26-2008, 03:53 AM   #5
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Join Date: Jan 2006
Chapter/Region: MAIC
Location: Fairmont WV
02 WRX STied PSM
03 L, 05 GT Legacy Wagons


Is it leaking at idle? If it is leaking at idle it needs adjusted. There is a screw and a lock nut on the end of it. It is used to adjust the preload on the spring inside the valve. All aftermarket valves need to be adjusted to the proper vacuum of the motor they are used on. Click on this link, scroll down about half way to where it says "Adjusting the spring preload"


They give a decent description on how to adjust BOVs.

That being said. HKS SSQV BOVs use a very strange design. They are not like most of the other BOVs on the market. They tend to be hard to adjust properly. Even if you get them closed at idle they tend to flutter and surge. They do not have a good design in my opinion.

If you have one, I would just put the stock one back on. Unless you are running enough boost to make the stock one leak, there is no real reason to have an aftermarket valve. Aftermarket bovs especially atmospheric ones are nothing but trouble on Subarus.
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