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Old 03-22-2009, 12:44 AM   #1
ar_mike
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Broken DV Replaced. (broken dv pics inside)

First of all, a BIG thanks to Edwin for the assistance!!!

As some of you may have known, my dv has been suspected of being torn and that I've been losing boost. Edwin helped me do some tq/hp logs on the vagcom and I was just doing 170hp/190tq. Today, I got the newer revision "G" valve and replaced mine. Apparently, my old dv (revision "B") was actually torn more than I had expected lol. Here are some pics. With the vagcom readings after the install, I'm back up at 225tq/203hp. Feels like my car got 1/2 chipped from before now hahaha. Mind you, these hp/tq numbers are from the crank. =)

Notice the area circled red.






Mandatory needed are T25 torx and 5mm hex.
Suggested tools are different extensions/ratchets etc to reach the 3 bolts that holds the DV on.
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Old 03-22-2009, 01:57 AM   #2
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how come u got the "G" valve? The newest one is "D" and its a completely different design!
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Old 03-22-2009, 09:40 AM   #3
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I practically confirmed the findings on the following link with the dealer rats as they test fitted a "D" diverter valve onto a BPY TFSI engine weeks ago at the stealer:

http://briskoda.net/octavia-ii/new-o...e-2-0t/134674/

The "D" diverter valve is designed for the CCTA TSI engine and not the BPY TFSI engine, and rightfully so when you take both the "G" and the "D" diverter valves and examine their difference in design and notice the difference in creating a seal. Basically you will be constantly leaking boost and especially noticible at low rpm if you install the "D" diverter valve onto a BPY engine. The stroke of both valves also have different amounts of travel.

Mike's car got a CEL for "Boost Regulation Fault - Control Range Cannot Be Reached - Lower Limit Exceeded" when the DV teared. I initially thought it was the PCV but turns out that is not the case according to Vortex (sorry dude for that $100 bucks on the BSH PCV ^^;;).

On a side note, we also found thru Vagcom logging that an aftermarket intake and catback exhaust show no statistical gains compare to stock in terms of performance. So buy a downpipe and chip.
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Last edited by krayzie; 03-22-2009 at 09:56 AM.
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Old 03-22-2009, 04:56 PM   #4
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haha no problem edwin, I was going to pick up the BSH stage1 nonetheless =P
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Old 03-23-2009, 11:18 AM   #5
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so a broken DV will result in CEL for sure?

where did you buy the DV from? local? how much do they cost?
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Old 03-23-2009, 01:50 PM   #6
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I just called ECS Tuning and they said and confirmed that they never had any customers calling them of having issues with the "D" version of the DV.

Now this has raised a flag on me whether I should get the Forge or the D version of the DV.
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Old 03-23-2009, 01:53 PM   #7
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You can get a "G" Diverter Valve for around 90 bucks at the dealership, and a little bit cheaper for a parallel import one at Precision Motorsports with the part number removed.

I still would not recommend a "D" Diverter Valve but anyways whatever floats your boat!

Personally I would not go with the Forge mechanical DV either since it's too slow. It's not like VW never tried it on their 2.0T prototype, they abandoned it for this very reason.
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Old 03-23-2009, 02:05 PM   #8
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a rev B!? jeeeeeeeeze. that's like a dinosaur. how'd it last this long anyway!!


and someone asked above so i'll answer:

a torn DV does not throw a CEL unless it's really torn. you have to exceed a certain amount of boost before it throws a light. you will probably have a DTC though, which vag com will pick up. you'll usually just see sluggish driving and bad gas mileage.
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Old 03-23-2009, 05:32 PM   #9
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haha yea...rev. "B"....my car has just passed 100,000kms a week ago~>....the car's from sept 05...the first batch of 2.0T jettas to reach Canada. I'm not chipped too so I guess i've been driving conservatively =P
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Old 03-23-2009, 05:32 PM   #10
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btw...i got the "G" valve at PrecisionTuning for $67.99...however as Edwin mentioned, it has the part number rubbed off.
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Old 03-23-2009, 09:10 PM   #11
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interesting... my mileage has gone to hell lately... I'm on a rev b or c in my 06 (original dv)... g going on this week, hopefully solves my problems! The lovely whistling I hear lately must have something to do with it too.... thought it was the new intake, but now I suspect the dv entirely.
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Old 03-23-2009, 10:06 PM   #12
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so nobody has installed a D version of the DV yet? I'd really like to see any inputs as this is the first time for me to find out from another GTI owner who had issues with the D version of the DV.
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Old 03-23-2009, 11:09 PM   #13
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I haven't seen any post regarding failed G DV. I don't see any reason to replace it with the D version.
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Old 03-25-2009, 11:10 AM   #14
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if i do'nt get CEL, what are some symtoms of having a bad DV?

$67.99 sounds affordable regardless of my DV condition
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Old 03-25-2009, 06:33 PM   #15
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I have a few friends including myself using the "D" valve and we see no problem at all with it on a FSI
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Old 03-25-2009, 08:09 PM   #16
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Quote:
Originally Posted by Vento 3 View Post
if i do'nt get CEL, what are some symtoms of having a bad DV?

$67.99 sounds affordable regardless of my DV condition

the only symptom that I could feel were:
1) loss of power (even at mid-throttle at around 3.5k rpm...pretty much the surge of boost that usually comes, it doesn't) lol

2) if you have an intake, the intake sucking-air noise would be amplified. Since mine tore, it was LOUD lol
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Old 03-25-2009, 08:11 PM   #17
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Quote:
Originally Posted by VW_MKV View Post
I have a few friends including myself using the "D" valve and we see no problem at all with it on a FSI
you guys don't feel a turbo lag till like 4k rpm and then it becomes fine?? That's what most people are feelings right now. When usually the tq comes around 3k rpm....it now comes at 4k rpm. With everyday driving at around 3k-ish rpm, that loss of power in the lower powerband would be a huge disappointment even if it holds boost properly above 4k rpm.
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Old 03-26-2009, 03:52 PM   #18
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Here's a before and after DV install.

Before (notice how peak TQ and HP is ~190 and ~170 respectively):


After: (notice how peak TQ and HP is now ~225 and ~205 respectively):
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Old 03-26-2009, 06:23 PM   #19
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Quote:
Originally Posted by ar_mike View Post
Here's a before and after DV install.
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Old 03-26-2009, 10:17 PM   #20
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D valve works fine. gtiTom has had it on for weeks and he has no issues.
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Old 03-16-2010, 02:19 PM   #21
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Okay I thought I'll re-visit this OEM "D" diverter valve thing...

So out of curiousity (actually more interest in reliability) with 40,000km on the clock I have replaced my perfect condition "C" DV with the "D" DV (as the "G" DV is no longer being produced and out of stock as shown on ETKA, superceded by the "D" DV for all 2.0T variants).

I test drove the car for 3 days now on dry tarmac and neither partial throttle nor full throttle could I tell there is a lag feeling on mid RPM range (if anything, the top end seems more punchier than before but that could just be in my head). However my engine is stock (only has a Carbonio intake for ease of engine cover removal because of the Tridon clamps, still using stock paper air filter). So I'm beginning to question if one feels lag at mid RPM range is it due to other mods (i.e. cold air intakes with cone filters). The only difference is that I can no longer hear that faint psssssh sound when I give it a little gas around the parking lot, the new DV is soooo quiet! But I still do not understand how this new design creates a seal without the rubber portion around the rim of the center piece and of a different travel (maybe the old design does not utilize the full travel of the diaphragm?)
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Old 03-16-2010, 02:48 PM   #22
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Love my AWE mechanical DV !!!
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