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Old 12-26-2007   #1
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OIL IN THE COOLANT

Hello to all,

Few days ago I bought r5 2.5 tdi toureg, with 4000km directly from the dealer. Yesterday coolant check light appeared so I poured some antifreeze solution in it. The check light went off but today it turned on again, so I've opened the hood and the coolant cap. I could not believe it when I saw cap was covered with oil (black).

Anyone had same problem?

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Old 12-27-2007   #2
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Sounds bad, I truly hope you didn't get hosed by the dealer. I can't think of many reasons for oil in the coolant, cracked block maybe. Are the turbo's water cooled on tdi's?

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Old 12-27-2007   #3
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One of the Aussie members with an R5 reported a coolant loss a while ago that included having coolant in the oil. If I remember correctly, it ended up being the water pump. Since it is gear-driven, there is a seal that was letting coolant get into the oil/lubrication system.

Replacing the water pump on this engine requires removal of the transmission, so it is a big deal. However, there may be a recall out on the water pump that may cover it. I know there was a campaign in Australia that (i believe) addressed this issue. Hopefully there is something similar that can take care of this for you.

Good luck,
Matt
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Old 12-27-2007   #4
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yes sounds like the water pump seal has failed.. vw should cover this
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Old 12-28-2007   #5
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Oil in the coolant is normally a sign of a blown head gasket. This is what I have learned over the years. This may not apply to VW since I am new to VW.
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Old 12-28-2007   #6
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Quote:
Originally Posted by me_tobster View Post
Oil in the coolant is normally a sign of a blown head gasket. This is what I have learned over the years. This may not apply to VW since I am new to VW.
that is true but he is not boiling or expelling fluid due to high pressure etc.. hopefully!!! and more likely is the "common" issue of the oil pump seal...
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Old 12-28-2007   #7
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According to the instruction manual the coolant fluid should be purple unless it has been contaminated with a coolant that is not compatible in which case it turns dark brown and will need changing. Its possible that you dont have any oil in your coolant.
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Old 01-02-2008   #8
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Yes- I too would say it is a probelm with the water pump allowing oil into the cooling system (I had the same issue on my prevous Treg).
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Old 01-10-2008   #9
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It will be your oil cooler at fault, causing the oil and coolant to mix. Our workshop has done 3 in the last 3 weeks. Also the VW T5 vans with the same engine have the same fault. Here is the technical bulletin.


Technical solution
Transaction No.: 2007699/4
Oil in coolant/coolant warning light on (5 cyl.)
Release date: 07-Sep-2007

Problem description
The coolant warning light is on, although sufficient coolant is available.
The coolant in the reservoir is contaminated with oil, this falsifies the display value of the coolant level sender.


Cause
Internal leak on the oil cooler.


Production solution
Optimised oil cooler from engine number:
BPE 013308
BPD 001737
BAC no longer in production
BLK no longer in production


Service solution
If there is oil in the coolant, the oil cooler must be replaced.
Add G 052 188 A3 at a 1:1 ratio to remove the oil from the cooling system.
Clean the cooling system for about 10 minutes at operating temperature after the thermostat opens. Perform a test drive. Drain the coolant drain and flush the cooling system with water. If necessary, repeat the cleaning.
For a complete draining the cooling system must be opened on the heating transition point at the right front drive shaft/steering rack. For the draining of the engine take off the right screw on the water pump worm gear as this is the lowest point of the cooling system.
Perform a 40 km test drive and check whether the complaint is fixed.
[IMG]file:///C:/ElsaWin/docs/hs2/V/en-GB/viewer/hst2-html-view-2006-12/res/hinweis.gif[/IMG]
Do not replace any further parts (such as cylinder head gasket or cylinder head ), as this does not cure the problem.
If it becomes necessary, only replace the coolant reservoir after the cleaning.


Accounting instructions
Service number /damage code/ manufacturer: 1740/ 050/ ...

Main operation
Associated operation
Repair operation
Designation
Time units
Main operation
17 40 19 70
Remove and install oil cooler
160 TU
01 50 00 00
Guided fault finding / guided function
2) TU according to diagnosis protocol
Associated operation
19 01 29 99
Clean cooling system
30 TU
19 38 17 99
Drain and fill up coolant
40 TU
19 40 55 99
Replace reservoir
20 TU
Total:


250 TU1)
1) Use the specified time only for this TPL.
2) The necessary time for using the VAS tester is not included above, these times are assessed separately.

Argumentation
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Old 01-12-2008   #10
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good info, an issue i don't think i have seen on CT before

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