Finally found the problem !!!

[B72.0T]

Yeah but, what I just noticed was that, when I started the car up, the assembly is actually in a tight fit, I can't even move it 1mm back (vacuum?)

[fly300kts]

I should have taken a video, mine was shaking like nuts

phil

[B72.0T]

I did it anyway. Cleaned it around a little, warmed up the car, and slapped JB Weld on there.

[AKBuc]

Fly are you sure that little gap is not supposed to be there? I noticed the same thing on my last summer, so I compared it to a friends 2.0T and his was exactly the same. I do know when the car is under max vacuum (warmed up at idle) the gap is no longer there.

[fly300kts]

This fitting, where the elbow is connected, should not move at all. When I went to the Dealer, I had a brand new housing in my hands and the fitting is pressed inside the aluminum housing, it should not move

Phil

[Boushard]

I have to watch this on my 2007, since the winter here is colder than your, and I think I have this clicking noise!!

I'll take a vids tomorrow morning when I'll start my car!!

[B72.0T]

I had no changes in noise, that I noticed.

[Inked]

I had no changes in noise, that I noticed.

i didnt have the noise to begin with. but air leaks are never good

[B72.0T]

True that home girl. Did you fix yours up?

[AKBuc]

This fitting, where the elbow is connected, should not move at all. When I went to the Dealer, I had a brand new housing in my hands and the fitting is pressed inside the aluminum housing, it should not move

Phil

Just to make sure we are on the same page (pretty sure we are). It goes Vacuum Pump>Plastic "Nipple">Rubber Elbow. You are saying the Plastic "Nipple" (that the rubber elbow fits on) should not move at all?

[fly300kts]

Just to make sure we are on the same page (pretty sure we are). It goes Vacuum Pump>Plastic "Nipple">Rubber Elbow. You are saying the Plastic "Nipple" (that the rubber elbow fits on) should not move at all?

Plastic Nipple = don't think is plastic is metal = no play at all

Phil

[iesales]

This fitting, where the elbow is connected, should not move at all. When I went to the Dealer, I had a brand new housing in my hands and the fitting is pressed inside the aluminum housing, it should not move

Phil

Do you know the part number of what would need to be replaced if you wanted to fix this without the JB Weld? I'm having the same issue and the part has a fare amount of play.

[fly300kts]

No, I didn't wrote is down but the price was nuts. Plus, where the pump is located, good luck!
JB weld will be your best friend in this situation

Phil

[iesales]

JB weld it is! Thanks

[fly300kts]

Don't forget to push down the elbow before application

Phil

[AKBuc]

Pretty sure it is plastic. Will double check.

[tan73]

Hi Phil, I live in Tampa and have the same problem. I am considering to use JB Weld. But my concern is that I am not sure if this hose is designed to be noisy that way. If we fix it in place with JB weld, the hose will no longer be flexible or expandable when heated. So will it break? What do you think? Since you have several Audi cars, what is the design in other model at this hose? Thanks.

[fly300kts]

No worries, the tube will not break and it's not designed like this (confirmed by the Dealer)
JB Weld his ass

Phil

[rune]

So,you mean that vacum pump is the problem if the car has RPM variation,or do i misunderstand ? My 2006 2.0 tfsi (tiptronic) is working like the video shown in thread 'strange behavior' !
I can see some grease on top of the vacum pump housing and the tube going out on top looks like you describe. I have no error codes.

[fly300kts]

So,you mean that vacum pump is the problem if the car has RPM variation,or do i misunderstand ? My 2006 2.0 tfsi (tiptronic) is working like the video shown in thread 'strange behavior' !
I can see some grease on top of the vacum pump housing and the tube going out on top looks like you describe. I have no error codes.

You will not get any code
If you pull the elbow up and down, does it move?

[rune]

yes,i can move it,just a little.

[fly300kts]

yes,i can move it,just a little.

Well I guess it will get worse

[rune]

Well I guess it will get worse

So,you mean i have to change the tube on top of vacum housing ? And install it so it does'nt move ? Then there will be no vacum leak,and no RPM variation ?

[fly300kts]

So,you mean i have to change the tube on top of vacum housing ? And install it so it does'nt move ? Then there will be no vacum leak,and no RPM variation ?

read the post, JB weld

[Coderedpl]

So wait, should I have the car running when first started to see if it moves or off and cold?

I want to check mine again, i have fluctuating rpms when cold.

[fly300kts]

You can do the check when the engine is cold

Phil

[Coderedpl]

You can do the check when the engine is cold

Phil

Car off or on? or doesnt matter?

[fly300kts]

Does not matter

[Coderedpl]

Does not matter

Will be checking mine later on. Thanks in advance.

[rune]

who of this JB weld did you use ? There are 2 types that i can find.

http://www.gasolin.no/index.php?main...2ukgml614a9714

[fly300kts]

who of this JB weld did you use ? There are 2 types that i can find.

http://www.gasolin.no/index.php?main...2ukgml614a9714

This one

http://www.gasolin.no/index.php?main...roducts_id=137

phil

[rune]

Thanks,i will order it and put it on.Hope my RPM variation goes away after applying JB

[joeygriebel]

any more updates of this resolving the rpm bouncing from "strange behavior" for others?

[DUCTMON]

fly300kts
I used some prc 1826 B 1/4 (aka ac 240) sealant, i will see how that holds up over time.
How do u think that will hold up over time. I figured it being softer than epoxy, it would be more flexible and withstand hot/cold cycles better.
Plus it was free at work. always nice.

[fly300kts]

fly300kts
I used some prc 1826 B 1/4 (aka ac 240) sealant, i will see how that holds up over time.
How do u think that will hold up over time. I figured it being softer than epoxy, it would be more flexible and withstand hot/cold cycles better.
Plus it was free at work. always nice.

LOL
If you used PRC, we are working on the same world. Are you working at ZSU?
1826 is meant for fuel and not heat. I would have used instead 1547 (-70C to 300C)
It might hold, time will tell

Phil

[DUCTMON]

I work in MKE , maintenance for an airline. 1826 is the type used most at work, and from my experience the most widely used. Can be used for anything from aerodynamic, fuel tanks, sealing antennas, nutplates, prox sensors, heated leading edge and cowl lip heat (bleed air) i have used it for almost everything.
fly300knts, nice hangar from the timing belt diy, came in handy. thanks man keep it up.

[rune]

I have put weld on like described here,but i still have this RPM variation. I used Araldit 2012 epoxy extra strong(i did'nt get the JB so i tried this). I can't move the tube now. So it must be something else causing the variation ?

Audi spesialits has tried the car and they mean i must flush the gearbox and put new oil on it.then if it does'nt work change the TC ! But they will not guarantee this is the problem
But if it's the TC will it help flushing ?

I have no clue about this

[rune]

Found out today: Araldit 2012 is not good enough,it does not manage to keep the hose on it's place
I am sick and tired of this problem and i will buy a new vacum pump.
i Will come back after replacing pump,maybe RPM problems is gone !

Thanks for all help,answers

[fly300kts]

If you don't mind, please let us know how much is the bill for partr & labor

Phil

[rune]

If you don't mind, please let us know how much is the bill for partr & labor

Phil

Hi Phil

The part cost 3200NOK(556.8 USD),with labor 4800NOK.(4800 Norsk krone (NOK) = 835.2 Amerikansk dollar (USD))


So i hope you are right about this solving RPM variation.I will order this week.

Can you tell me how vacum pump works ? Cause i was thinking it just controls the brake system ? So,how can it influence the RPM ?


(I must say,this variation came after changing timing belt.)So you guys know!