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 gomi_otaku Your Own Question
gomi_otaku
gomi_otaku, VW Technician
Category: VW
Satisfied Customers: 3378
Experience:  VW FastTrack '00-'01, VW Academy Chicago and Seattle '00-present, VW Certified
12249065
Type Your VW Question Here...
gomi_otaku is online now
A new question is answered every 9 seconds

I have a 99 vw passat 1.8t that im getting coolant mixed

Customer Question

Hi i have a 99 vw passat 1.8t that im getting coolant mixed with oil
Submitted: 1 year ago.
Category: VW
Expert:  internal88 replied 1 year ago.

Hello, I'm Brandon - VW tech.

The oil cooler is damaged you will need to replace it and also flush out the coolant system.

Expert:  internal88 replied 1 year ago.

The oil cooler cause $122 and it is a 1.6 job including flushing the cooalant.

Expert:  internal88 replied 1 year ago.

Make sure to use G 012 A8F A4 purple coolant.

Expert:  internal88 replied 1 year ago.

Please rate me positive for the prompt service, thank you.

Customer: replied 1 year ago.
I already replaced the oil cooler twice i even bypassed it to make sure it wasn't the oil cooler
Expert:  internal88 replied 1 year ago.

I assumed you have change the o-rings.

Expert:  internal88 replied 1 year ago.

It is very possible the turbo is cracked. The Turbocharger does have both coolant and oil lines going in and out of it.

Expert:  internal88 replied 1 year ago.

Here are the common areas where the 2 sections meet other then the oil cooler, turbocharger, and cylinder head.

Expert:  internal88 replied 1 year ago.

The next common thing is the cylinder head has a link crack.

Expert:  internal88 replied 1 year ago.

line crack. You have done an engine compression test?

Customer: replied 1 year ago.
i check compression it's good
Replaced head gasket twice
Installed another head
Car runs great
No check engine light no smoke from exhaust
Expert:  internal88 replied 1 year ago.

By process of elimination the only thing is the turbo that have coolant and oil passage way. Check out the center shaft condition of the turbo. Please rate me positive for the prompt service thank you!

Customer: replied 1 year ago.
turbo has been replaced with a new one, i was hoping to hear some other options, different than what I've already done
Expert:  internal88 replied 1 year ago.

I will opt out and let other tech see this question. Do not rate me.

Expert:  Eric replied 1 year ago.

HI,

Different expert here.

So that I am not repeating what has been replaced and tested, please list absolutely everything you have done to this point to resolve this

Also, how much coolant is getting into the oil in about a week's time of driving?

Customer: replied 1 year ago.
Hi, this is what I've replaced so far
Oil cooler twice
Head gasket 3 times
Cylinder head
Turbo charger
Compression tested good
Car runs great
Ive run it about 30 miles and you can see about 1/8" oil layer on coolant reservoir
And milky stuff at oil cap and oil stick
Expert:  Eric replied 1 year ago.

HI,

Ok, outside reach, but have you pulled the thermostat and checked the inside of where it goes into the side of the block for cracks allowing the coolant and oil to mix

Customer: replied 1 year ago.
No but i will do that
Thanks
Expert:  Eric replied 1 year ago.

HI,

Ok, keep me posted

Expert:  gomi_otaku replied 1 year ago.

Do you still need help with this issue? Your question is still showing active in the question list.

Customer: replied 1 year ago.
I did a visual check at where thermostat meets block but couldnt see anything but by performing a pressure test a technician was able to diagnose the issue
Looks like there's a chrack in the block
Thanks for your help
Expert:  gomi_otaku replied 1 year ago.

OK- sorry to hear that, especially after you have put so much work into it already.