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 Stan Your Own Question

Stan
Stan, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3526
Experience:  Technical support engineer
16766657
Type Your Mercedes Question Here...
Stan is online now

I have a problem with my mercedes c230 kompressor recently

Resolved Question:

I have a problem with my mercedes c230 kompressor recently had major job on engine due to tensioner failing and smashing valves. Now the problem I have is that before and after I had this job repaired (head done, valves repalced, water pump, new chains, decoked, piston rings, etc) I was losing alot of oil. basically I would fill to about maximum and then drive. 250 miles latter oil has leaked from engine. there are slight puffs of black smoke from the exhaust, but the mechanic cannot figure it out and he says there are no leaks. Help.

Submitted: 2 years ago.
Category: Mercedes
Expert:  Shantal-Mod replied 2 years ago.
Hello,
I'm Shantal and I'm a moderator for this topic.
I've been working hard to find a Professional to assist you with your question, but sometimes finding the right Professional can take a little longer than expected.
I was checking to see if you had already found your answer or if you still need assistance from one of the Professionals.
Please let me know if you wish to continue waiting or if you would like for us to close your question?
Thank you,
Shantal
Customer: replied 2 years ago.

Hello,

I still have not found an answer.

What happens if I close the question, do I get a full refund.

Regards,

Omar.

Expert:  Stan replied 2 years ago.
Hello Omar,
If the engine is getting oil through the engine breathing, whole intake should be full of oil.
If not, please have the spark plugs checked. If intake is clean, but spark plugs have the deposits- it will indicate that engine mechanical components are to blame.
Also combustion chamber leakdown test must be carried out.
Unfortunately it is not possible to check the valve stem seals without rempving the camshafts, valve stem seals and valve springs. Their conition is determined by measuring the valve play in the valve stem.
Big wear of the cylinder wall will cause too big of a play for the pistons, and even with the new rings, there will be oil consumption.

Best regards,
Stan
Customer: replied 2 years ago.

Hi Stan,

What do you mean by engine breathing, and when you say intake can you be a bit more spcific.

Is combustion chamber leakdown test somthing most garges can carry out or somthing that mercedes themslves do.

Given that you say that the engine will still consume oil, do you think that drinking 4-5 liters of oil within 250 miles is very excessive.

Regards,

Omar

Expert:  Stan replied 2 years ago.
Omar,
there are lines from crankcase connected to the intake hoses to reduce the crankcase pressure. This air from crankcase and valve covers goes through oil separators and back into the engine. If this system does not work properly, oil will be consumed with fresh air.
So please have the throttle valve, mass airflow sensor and the intake manifold checked for oil residues.
1 liter of oil per 700 miles is considered to be maximum normal consumption. So the oil consumption in this case is way too high.

Not all of the garages do a leakdown test. Usually they check the compression.
Stan, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3526
Experience: Technical support engineer
Stan and other Mercedes Specialists are ready to help you

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:

    504
    BEng hons Mech engineering, in auto industry 22 years
< Previous | Next >
  • http://ww2.justanswer.co.uk/uploads/35/350matt/2012-6-7_182356_matsavatr.64x64.jpg Matt's Avatar

    Matt

    Mechanical Engineer

    Satisfied Customers:

    504
    BEng hons Mech engineering, in auto industry 22 years
  • http://ww2.justanswer.co.uk/uploads/EU/eurotec/2012-6-11_13153_mpjaphoto.64x64.JPG Marty's Avatar

    Marty

    ASE Certified Technician

    Satisfied Customers:

    21406
    Bosch Certified Master Technician with over 35 years experience in the automotive industry.
  • http://ww2.justanswer.co.uk/uploads/MI/mikeamechanic/2013-4-2_175558_photo.64x64.JPG mike_a_mechanic's Avatar

    mike_a_mechanic

    Mercedes Mechanic

    Satisfied Customers:

    116
    17 years experience as a auto mechanic, foreign and domestic.5 years running my own repair business.
  • http://ww2.justanswer.co.uk/uploads/MB/MBpaul/2013-8-21_204936_paul.64x64.jpg MB Paul's Avatar

    MB Paul

    Mercedes Technician

    Satisfied Customers:

    212
    Mercedes Benz Qualified Diagnostic Technician
  • http://ww2.justanswer.co.uk/uploads/IN/indytech/2013-8-8_102717_SantoDomingo146598x6402.64x64.jpg Greg's Avatar

    Greg

    Technician

    Satisfied Customers:

    1094
    Automotive diagnostic tech
  • http://ww2.justanswer.co.uk/uploads/TE/techmachine/0601821347169_717372168_8940977_39623330_o.64x64.jpg Ross's Avatar

    Ross

    Diagnostic and repair technician

    Satisfied Customers:

    467
    Licensed diagnostic and repair technician