How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Robert Your Own Question

Robert
Robert, UK Qualified Car Technician
Category: Audi
Satisfied Customers: 4364
Experience:  Fully qualified 19+yrs exp/self employed technician in the UK
13210289
Type Your Audi Question Here...
Robert is online now

I have a 1996 A4.The oil warning light came on and on topping

Customer Question

I have a 1996 A4.The oil warning light came on and on topping up the engine oil I noticed that the coolant was very thick and light brown in colour. There has been no drop off in performance nor indication of overheating. Can you advise please?
Submitted: 3 years ago.
Category: Audi
Expert:  Robert replied 3 years ago.

Hi..

 

Hopefully i can help..

 

Is the engine a 1.8 Turbo or just the standard 1.8?

 

What condition is the oil on the dipstick?

 

 

Customer: replied 3 years ago.

Its a standard 1.8. The oil on the dipstick looked ok but was very low. The heater did not blow out hot air only barely warm.

Expert:  Robert replied 3 years ago.

Hi..there thanks for your reply..

 

Ok..By the sounds of your description in regards to the coolant reservoir this will be most likely engine oil your seeing in there mixing with the coolant in the system..hence the reduction in oil level on the dipstick..aswell as too off course the heating issues and possible through time engine overheating issue's as the the mixture in there gets thicker causing restrictions in the heater matrix and or radiator/thermostat and of course making harder for the water pump to circulate around as it would with just coolant..There are a few reason fro that to mix like that and the first is possible oil cooler failure - some 1.8's dont have them but you can easily check on yours by locating your oil filter - where the oil filter screws onto above that you will see a square object with two coolant hoses coming and going from that oil cooler..if you do have have one of these on the oil filter housing/bracket then its looking very much like that will be your problem and causing both fluids to mix as you see..because oil pressure is allot greater then the coolant system pressure the oil will always find it way into the coolant system as opposed to the other way round..the other likely scenario is possible head gasket failure or breach between the two coolant oil passage ways and thus the two come into contact and basically the same scenario above oil into the coolant..So as above certainly check for that cooler the oil filter is screwed into..if you do have one then it would be worth having that replaced..The next problem really is having the system thoroughly flushed out and will take allot of flushing / using coolant system flushing additives etc run through the system or even household dishwasher tabs can help of course the system needs refilled/thermostat removed- the engine run upto slightly warm and then that added the engine run till upto temp to circulate it around then let it cool off the engine and then re drain all the stuff that's been dislodged etc and flush all out again thoroughly.so as above that about the only ways or the most common as per oil getting into the coolant system..I do hope this helps..If you need to ask anything else or include further info then just continue before you rate..

What Customers are Saying:

 
 
 
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil
< Previous | Next >
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex
 
 
 

Meet The Experts:

 
 
 
  • Matt

    Matt

    Mechanical Engineer

    Satisfied Customers:

    182
    BEng hons Mech engineering, in auto industry 22 years
< Last | Next >
  • http://ww2.justanswer.com/uploads/35/350matt/2012-6-7_182356_matsavatr.64x64.jpg Matt's Avatar

    Matt

    Mechanical Engineer

    Satisfied Customers:

    182
    BEng hons Mech engineering, in auto industry 22 years
  • http://ww2.justanswer.com/uploads/audidoc/2008-12-23_175252_headshot.jpg AudiDoc's Avatar

    AudiDoc

    ASE Certified Technician

    Satisfied Customers:

    1583
    Independent European garage owner. Over 20 years experience
  • http://ww2.justanswer.com/uploads/MI/mikeamechanic/2013-4-2_175558_photo.64x64.JPG mike_a_mechanic's Avatar

    mike_a_mechanic

    Mechanic

    Satisfied Customers:

    70
    17 years experience as a auto mechanic, foreign and domestic.5 years running my own repair business.
  • http://ww2.justanswer.com/uploads/FO/fordtwo/2014-12-19_163422_arrepair.64x64.jpg Robert's Avatar

    Robert

    UK Qualified Car Technician

    Satisfied Customers:

    36
    Fully qualified 19+yrs exp/self employed technician in the UK
  • http://ww2.justanswer.com/uploads/IN/indytech/2013-8-8_102717_SantoDomingo146598x6402.64x64.jpg Greg's Avatar

    Greg

    Technician

    Satisfied Customers:

    1080
    Automotive diagnostic tech
  • http://ww2.justanswer.com/uploads/TE/techmachine/0601821347169_717372168_8940977_39623330_o.64x64.jpg Ross's Avatar

    Ross

    Diagnostic and repair technician

    Satisfied Customers:

    453
    Licensed diagnostic and repair technician