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Ron, ASE Certified Technician
Category: Hyundai
Satisfied Customers: 35605
Experience:  35 year in the Auto repiar business ASE Certified
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Hyundai i40 1.7 Diesel 136Hp 2012 Aut. There is coming

Customer Question

Hyundai i40 1.7 Diesel 136Hp 2012 Aut.
There is coming Diesel in the motoroil.
0.5 cm. more oil in 300 km.
I have before drive about 3.000 km. after oil change. and there was about 3 cm. more motoroil than normal. It's alot... and not good.
The car have total drive 280.000 km.
Hyundai in Denmark have used one week, tried to find the problem, without luck.
Is there anyone who know about this problem (Diesel in mortoroil).
The car gave DPF.
The car is use a lot fuel. (13 Liters/100km.)
The engine cooling fan is not running after the engine is switched off. Not even if I have drive fast for 100 km. and stop turn off engine.
I drive most in the city, but also about every 2. week a least*****
The problem is getting more and more worse for every month.
injectors no. 1 and 3 is new. (300 km.), I change them because of dark color diesel on return..
$1.500 for two.. :-(
There is clean and dry around all the injectors on top...
I don't want to change the other two, without knowing better... too expensive..
Anu good advise?
Lars, Denmark
Submitted: 1 year ago.
Category: Hyundai
Customer: replied 1 year ago.
Picture of the 4 injectors return lines
Expert:  Ron replied 1 year ago.

Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.

My information on your Hyundai I 40 is very limited but the common cause for fuel to enter the oil is in most cases due to either leaking injector or bad injector sleeves. I would suggest you have them check these.