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View Full Version : Boost control valve? Clutch issue. . .



crazy tarzan
09-20-2015, 04:27 PM
The other day while my fiance was driving my audi, the clutch stopped working on her. What a pain in the rear that day (3 cars went out in one day!).

I've started a clutch replacement, just waiting on the flywheel to get resurfaced, and the bolts I need to get here (had to buy a random assortment since all the axle bolts were hex key vs triple square, some were stripped etc. etc.).

Found a few random wires and such that I'd like some info/opinions on if anyone would care to speculate, and have included a pic of why the clutch quit working--I was wondering if there is a specific reason the clutch failed as shown:

Clutch disk:
http://i276.photobucket.com/albums/kk8/nlaidlaw1/Vehicles/85ED2538-0849-4856-B10A-4CEC9284BB9C.jpg (http://s276.photobucket.com/user/nlaidlaw1/media/Vehicles/85ED2538-0849-4856-B10A-4CEC9284BB9C.jpg.html)

Pressure plate (anyone care to speculate on why it failed like this?):
http://i276.photobucket.com/albums/kk8/nlaidlaw1/Vehicles/9AC91AFD-7B56-4CEE-A38F-0B215FD38C6C.jpg (http://s276.photobucket.com/user/nlaidlaw1/media/Vehicles/9AC91AFD-7B56-4CEE-A38F-0B215FD38C6C.jpg.html)


Apex boost control valve--found on passenger side while moving stuff to drop strut/spring for a control arm replacement:
http://i276.photobucket.com/albums/kk8/nlaidlaw1/Vehicles/43A1E2FF-D4C9-47DF-B298-FF15454CC824.jpg (http://s276.photobucket.com/user/nlaidlaw1/media/Vehicles/43A1E2FF-D4C9-47DF-B298-FF15454CC824.jpg.html)

Which is plugged into the harness that is unplugged on the drivers side, and what the heck is the little round thing with a vacuum hose that's been cut (in left of pic)? Anyone know if I need to plug any of this back in?
http://i276.photobucket.com/albums/kk8/nlaidlaw1/Vehicles/9216F862-6953-4506-B320-9E05473B097A.jpg (http://s276.photobucket.com/user/nlaidlaw1/media/Vehicles/9216F862-6953-4506-B320-9E05473B097A.jpg.html)

Avant Nate
09-20-2015, 06:25 PM
Probably off an ebc, PO didn't feel like pulling the bolster to remove the boost line, so just cut it at the fire wall. I bet the electric components and the boost line dead end behind the glove box or such. I wouldn't worry about it.
Take a picture of the other side of the pressure plate. The clutch disk looks pretty good, although not stock?

crazy tarzan
09-20-2015, 07:01 PM
Clutch disk was made in China, I'll snap a shot of the other side of pressure plate tomorrow.

How many sets of wires should there be routed into the ecu box?

crazy tarzan
09-21-2015, 04:51 PM
Pics of back of pressure plate, and flywheel-which NO ONE in a town of 65 k can resurface!

Pressure plate:
http://i276.photobucket.com/albums/kk8/nlaidlaw1/Vehicles/DE201614-A8CE-408C-8DBE-11D50C27A0D8.jpg (http://s276.photobucket.com/user/nlaidlaw1/media/Vehicles/DE201614-A8CE-408C-8DBE-11D50C27A0D8.jpg.html)

Flywheel:
http://i276.photobucket.com/albums/kk8/nlaidlaw1/Vehicles/CA983C6C-7F75-4158-A2CE-7262B46F7EE5.jpg (http://s276.photobucket.com/user/nlaidlaw1/media/Vehicles/CA983C6C-7F75-4158-A2CE-7262B46F7EE5.jpg.html)

redline380
09-21-2015, 04:55 PM
The flywheel can be resurfaced, just tell them to do it as normal. Although they are not very expensive from rock auto, maybe $150 or so.

I'm not sure what kind of clutch was there in, but it is chinese garbage. Do not reuse the disc. Likewise, a Luk clutch kit from rock auto is only around $150, so it you want to go stock, it isnt very expensive.

However, I'm sure the car is chipped and stock clutches dont hold up well. I would recommend a quality clutch setup. Check out RA4 from ECS.

crazy tarzan
09-21-2015, 05:00 PM
Car isn't currently chipped (but was apparently by po, which might explain the Chinese clutch, and all the 'wrong' bolts in the axles etc).

Napa was the only place that would even try to resurface, and they said they can't because of the pins which they can't pull .. .

redline380
09-21-2015, 05:24 PM
That's BS. You can resurface them. The grinding stone works from inside out, no need to remove anything

Avant Nate
09-21-2015, 07:29 PM
Just consider it as an opportunity to upgrade and throw all that in the trash.

M-Hood
09-22-2015, 02:44 PM
228mm pressure plates do not have a tight grain, so when they over heat they tend to crack just like it did on you. It is a common issue with the well made 228mm pressure plates so will most likely be an even larger issue with cheaply made 228mm pressure plates. The 240mm pressure plates have a much tighter grain.