Mystery hose!

Tiny
NOTJOEYCLARK
  • MEMBER
  • 1998 AUDI A4
  • 2.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
I recently purchased this car from a guy and he told me the water pump needed to be replaced because it overheats and he already replaced the thermostat. Well upon further inspection I noticed that when he reassembled the car, he forgot to put the hose back on for the coolant. I tired that and it still overheats, but I noticed a hose that looks important and I have no clue what it is or where it goes. If anyone could please respond soon id greatly appreciate it?

The circled hose is the hose in question.
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Saturday, March 12th, 2016 AT 10:53 PM

9 Replies

Tiny
NOTJOEYCLARK
  • MEMBER
This is the picture
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+1
Saturday, March 12th, 2016 AT 10:55 PM
Tiny
HMAC300
  • EXPERT
From your picture it looks to be a vacuum hose, see picture.
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Sunday, March 13th, 2016 AT 10:29 AM
Tiny
NOTJOEYCLARK
  • MEMBER
Do you know what it is called? It is unplugged and I need to do research on it to know where to plug it in
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Monday, March 14th, 2016 AT 2:52 PM
Tiny
HMAC300
  • EXPERT
Taking a guess I would say either #11/12 10 or 9
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Monday, March 14th, 2016 AT 4:02 PM
Tiny
NOTJOEYCLARK
  • MEMBER
I did do a little more looking and I realized that the PCV hose is missing. Could those two factors be the reason it is over heating?
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Monday, March 14th, 2016 AT 8:48 PM
Tiny
HMAC300
  • EXPERT
No it would use more oil maybe but it should not cause it to overheat. If it does it within a few minutes of start up then check thermostat, if it takes longer check for cold spots on radiator, if you have those when the car overheated then the radiator is bad, otherwise have coolant system pressure checked for a head gasket leak.
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Tuesday, March 15th, 2016 AT 5:37 AM
Tiny
NOTJOEYCLARK
  • MEMBER
So would you know what this hose is called? I think it is the PVC hose, but I want to make absolutely sure that it is because I'm about to order it. I have a picture of my car that is missing the hose. I will post it in the comments. The picture on this comment is a picture I found online.
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Wednesday, March 16th, 2016 AT 11:31 AM
Tiny
NOTJOEYCLARK
  • MEMBER
This one is mine. Notice that it is missing. I am pretty sure it is the PVC hose but I would appreciate a second opinion.
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Wednesday, March 16th, 2016 AT 11:31 AM
Tiny
HMAC300
  • EXPERT
I cannot really tell what is missing in the picture, not all cars have pcv valves or systems they are done another way. If you can find a better picture at a dealer would be more helpful to you as well as us.
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Wednesday, March 16th, 2016 AT 12:23 PM

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