Need help in diagnosing a motor problem in my 03 a4 quattro 1.8 turbo.

Asked by Jan 01, 2015 at 01:22 PM about the 2003 Audi A4 1.8T Quattro

Question type: Maintenance & Repair

One afternoon while checking the oil in my wife's 03 a4 Quattro 1.8 turbo I noticed that the water reseviour was full of dark fluid appearing to be engine oil. When I checked the oil there was barely any on the dip stick. I had high hopes that after allowing our daughter to use the car that she might have added oil to the wrong place. But unfornately there appears to be bigger problems at hand. Normally the car doesn't use any oil and as of now it still runs great, but after adding some oil to the engine and running it for a few minutes there is water in the engine oil as well. I done a compression test and all cylinders still have over a 170psi. Like I said the car still runs great but this oil exchange is not right. I'm wondering if someone else has maybe had the same problems and could give me some advice in witch direction I should go in diagnosing the problem. I would hate to pull the head and that not be the problem.

4 Answers

23,815

Look at the oil cooler first, second would be seal on the turbo. Your compression test looks good. My bet would be oil cooler leaking into the radiator.

KenF , thanks for the advice on the oil cooler. Any suggestions on where to look for a diagram of the motor components?

23,815

I'm not very familiar with your make of car, I'd try some of the specialized Audi forums around, they'll be able to give you specific information. Your symptoms are a classic sign of a leaky cooler, however. If you rev the engine and see bubbles in the radiator or in the reservoir, then you might want to look at an intake or head gasket. There is a type of test that can look for exhaust gas (spent carbon) in the radiator fluid as another proof of a bad head gasket, but I'd start with ruling out the oil cooler first.

1 out of 1 people think this is helpful.
9,045

go to the vw dealer and head to the parts counter. ask for a schematic of the oil cooler and they will print it and the part number sheets out for you for free.

Your Answer

Add photo

Related Questions

A4

Looking for a Used A4 in your area?

CarGurus has 10,738 nationwide A4 listings starting at $700.

ZIP:

Search Audi A4 Questions

Audi A4 Experts

#1 Deathjam4
Deathjam4
Reputation 3,130
#2 lukeyramone
lukeyramone
Reputation 510
#3 Tom Demyan
Tom Demyan
Reputation 390
View All

Related Models For Sale

Used BMW 3 Series
942 Great Deals out of 33,395 listings starting at $1,000
Used Audi A6
135 Great Deals out of 6,495 listings starting at $999
Used Mercedes-Benz C-Class
476 Great Deals out of 28,657 listings starting at $1,499
Used Audi A3
64 Great Deals out of 6,521 listings starting at $3,499
Used Audi S4
34 Great Deals out of 1,399 listings starting at $4,750
Used BMW 5 Series
493 Great Deals out of 15,030 listings starting at $2,499
Used Honda Accord
707 Great Deals out of 87,166 listings starting at $699
Used Ford Mustang
368 Great Deals out of 46,982 listings starting at $1,500
Used Audi A8
27 Great Deals out of 1,928 listings starting at $3,999
Used Mercedes-Benz E-Class
375 Great Deals out of 21,739 listings starting at $699
Used Chevrolet Camaro
150 Great Deals out of 32,901 listings starting at $1,995

Used Cars For Sale

2017 Audi A4 For Sale
13 Great Deals out of 4,652 listings starting at $29,911
2016 Audi A4 For Sale
6 Great Deals out of 219 listings starting at $24,699
2015 Audi A4 For Sale
9 Great Deals out of 352 listings starting at $18,499
2014 Audi A4 For Sale
35 Great Deals out of 1,232 listings starting at $14,885
2013 Audi A4 For Sale
20 Great Deals out of 496 listings starting at $9,980