 BOV gone bad? |
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 Oct 8 2006, 07:17 PM
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#1
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 Eats and sleeps DSM jargin.  Group: Members Posts: 1,995 Joined: 27-November 04 From: Yates City IL Member No.: 389  |
I was out messing with the car today. I happened to put my hand over the bov and was blipping the throttle. It seemed to be sucking a small amount of air in through the vented 1g BOV. I covered it with my hand to feel the vacume. It didn't seem to be leaking air under a boost test.
This can't be right, I wouldn't think you'd want to be sucking unfilter air into the engine? How do you test a BOV? -------------------- 92 Eagle Talon TSI AWD "The Black Golfball" How fast can a 14B go???
91 Chevy C1500 "Problem Child" **SOLD** 01 Impala DD 07 Trailblazer Wife's new DD Cars run on blood, sweat, and horsepower... Without the first two, you can't get the last" SOB Racing "Sitting On Blocks" |
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Oct 9 2006, 06:14 AM
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#2
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
If you've got some sort of machine that makes vaccum, then you can test it. Problem is, there's not a whole lot of test platforms out there to hook a small vaccum hose up to and test it with. Leaking at idle is common for the stock BOV as it's under a small amount of vaccum then. Once the throttle is increased and positive manifold pressure is achieved, it shouldn't leak until you let off.
-------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Oct 9 2006, 07:06 AM
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#3
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DSM Tech Wizard Group: Members Posts: 2,256 Joined: 10-January 01 From: central IL Member No.: 10 |
QUOTE (black92_tsi_awd @ Oct 8 2006, 07:17 PM) I was out messing with the car today. I happened to put my hand over the bov and was blipping the throttle. It seemed to be sucking a small amount of air in through the vented 1g BOV. I covered it with my hand to feel the vacume. It didn't seem to be leaking air under a boost test. This can't be right, I wouldn't think you'd want to be sucking unfilter air into the engine? How do you test a BOV? If you weren't venting to the atmosphere, the air would be filtered... 
-------------------- The fastest car I own is a minivan....
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Oct 9 2006, 09:28 AM
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 Post Master Group: Members Posts: 908 Joined: 7-October 03 From: Chillicothe, IL Member No.: 182 |
Exactly what I was thinking but was to lazy to reply with. Crush it until it doesn't leak at idle, but not so much that it won't blow off.
-------------------- GVR4 866/1000 = the perpetually broken car
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Oct 9 2006, 11:15 AM
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#5
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
QUOTE (ncgalant @ Oct 9 2006, 09:28 AM) Exactly what I was thinking but was to lazy to reply with. Crush it until it doesn't leak at idle, but not so much that it won't blow off. Agreed. Be very very careful though. It doesn't take much to increase spring pressure. I made the mistake of hitting mine with a hammer the first time. If I was doing it again, I'd probably use a C-clamp and progressively tighten it down until it didn't leak. -------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Oct 9 2006, 03:07 PM
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#6
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Eats and sleeps DSM jargin. Group: Members Posts: 1,995 Joined: 27-November 04 From: Yates City IL Member No.: 389 |
Are we hating on the vented BOV???
Anyway, thanks for the suggestions on fixing it. I do have a Turbo XS RFL in the garage, but I figured that would be too loud and would cause me to get more grief than the stock vented BOV!
-------------------- 92 Eagle Talon TSI AWD "The Black Golfball" How fast can a 14B go???
91 Chevy C1500 "Problem Child" **SOLD** 01 Impala DD 07 Trailblazer Wife's new DD Cars run on blood, sweat, and horsepower... Without the first two, you can't get the last" SOB Racing "Sitting On Blocks" |
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Oct 10 2006, 06:37 PM
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#7
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Eats and sleeps DSM jargin. Group: Members Posts: 1,995 Joined: 27-November 04 From: Yates City IL Member No.: 389 |
Well car will now only hold 13 psi of boost...went to TURBO XS BOV, see that thread.
-------------------- 92 Eagle Talon TSI AWD "The Black Golfball" How fast can a 14B go???
91 Chevy C1500 "Problem Child" **SOLD** 01 Impala DD 07 Trailblazer Wife's new DD Cars run on blood, sweat, and horsepower... Without the first two, you can't get the last" SOB Racing "Sitting On Blocks" |
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