HKS SSQV Leaking under boost?

[tsunari]

Anyone ever done a boost/leak test and found their SSQV leaking? Mine seems to not be sealing correctly between the small inner purple plunger and the bigger black outer valve (the one that has 'sequential blow off valve' written on it). Any ideas how to fix this or is it just the nature of the beast?

I was under the impression that these things weren't supposed to leak

 

[tsunari]

So perhaps mine is defective??

 

[exzercist]

back the nut all the way back the furthest until it almost falls out.

 

[tsunari]

back the nut all the way back the furthest until it almost falls out.

What'll that do?

 

[1LE]

That nut is used to adjust the BOV "opening point" for lack of better term.

 

[tsunari]

That nut is used to adjust the BOV "opening point" for lack of better term.

So loosening the nut is going to let the BOV "open" sooner? But the problem now is it's leaking slightly . . .

 

[Dieselboy]

What gives you the impression its not sealing correctly? If you hear or feel air rushing out of the opening at idle, try tightening it up a bit then do a leak test. You want to tighten it if your leaking air (turn the screw clockwise to tighten). Gradually tighten it, maybe a quarter of a turn at each time (make sure you tighten the lock nut on it as well to prevent the screw from backing itself out). If you dont have access to an air compressor for a leak test, then adjust the valve screw as I meantioned and take the car for a few test drives between adjustments. If it surges/stutters under a WOT shift, then it's too tight.

Also make sure you installed the red O-ring in the flange. If its not in there, you'll be leaking quite a bit of air through the flange groove.

 

[tsunari]

What gives you the impression its not sealing correctly? . . .

Did a leak-test a while back and the only place that I could hear air leaking out was through my BOV. So I took the recirculation tube off and found out that it was leaking between the small inner plunger and the bigger outter seal. I could take my finger and apply a slight downward pressure (perpendicular to the face of the seal) and that would seal it. Let the pressure off and I could hear it again. (Hope something's not screwed up).

Also make sure you installed the red O-ring in the flange. If its not in there, you'll be leaking quite a bit of air through the flange groove.

Yup- the O-ring is there


On a side question . . . when doing a pressure test:

+Have the cams set @ TDC (all valves should be closed right?)
+Pressurize the intake

with no leaks, the boost reading should stay perfectly steady right?? Or will there be slight leaks out the mbc, etc . . .?

 

[Dieselboy]

If you have a bleeder on the MBC, it will gush air slightly. Im sure you know this, but when you do a leak test, there will be a hissing or whining sound from the source. Just listen around the BOV area to see if the valve leaks under any pressure. If it is, try tightening up that valve a little bit like I told you to in my previous post and try again.

 

[exzercist]

well you can take it apart and take the washer out it will let you get another turn out wards. and counter clock wise is to let the bov hold more pressure and takes more air to open it it does let it open sooner.

 

[tsunari]

On a side question . . . when doing a pressure test:

+Have the cams set @ TDC (all valves should be closed right?)
+Pressurize the intake

with no leaks, the boost reading should stay perfectly steady right?? Or will there be slight leaks out the mbc, etc . . .?

So am I correct about the intake leak test?

 

[exzercist]

if there is a bleeder on the blowoff then yes there will be a slight leak.

 

[My96AWD]

well you can take it apart and take the washer out it will let you get another turn out wards. and counter clock wise is to let the bov hold more pressure and takes more air to open it it does let it open sooner.

its a hks ssq bov. its different the the push type bovs. tighter = clockwise. and there is no washers so dont even bother taking it apart to take them out. but what i have noticed on a ssq bov is that there is a rubber seal between the two valves and it wears out over time. the only way to get a good look at it is to either get a vacumm tester and hook it up the nipple and pump it up so the valve opens or taking it all apart to release the tension on the spring ( major pain in the ass)

 

[Blue92]

This is weird, my SSQV leaks under boost from about 4-5k, but then seals up for the rest of the powerband. It is completely boggling me right now.

 

[tsunari]

This is weird, my SSQV leaks under boost from about 4-5k, but then seals up for the rest of the powerband. It is completely boggling me right now.

any idea if there's a "rebuild kit" or something like that? I'd hate to have to just throw this one away or buy a different BOV

 

[FwDdSm]

I was wondering if you ever found a solution to your problem because I did a blt recently and discovered my ssqv is leaking under boost as well. Thanks