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I have a slight amount of sludge on the inside top of my…

Customer Question
I have a slight amount...
I have a slight amount of Brown sludge on the inside top of my header tank and on the inside of the filler cap. Car only covers approx. 3000 miles a year and the last time I took the filler cap off was about 4 years ago.
Submitted: 2 years ago.Category: Audi
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Answered in 11 minutes by:
1/31/2016
Audi Mechanic: internal88, Technician replied 2 years ago
internal88
internal88, Technician
Category: Audi
Satisfied Customers: 2,768
Experience: I have been repairing Audi vehicles for over 15 years. I specialized in German diagnostic.
Verified

Hello, I'm Brandon - Audi tech.

The brown sludge has lot to do with short trip interval.

When was the last time you have an oil change?

Typically the PCV valve is clogged or dirty which build up the brown sludge.

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Audi Mechanic: internal88, Technician replied 2 years ago

https://jhmotorsports.com/shop/catalog/oil-separator-oem-pcv-breather-for-b7-rs4-and-b8-s5-42l-v8-p-923.html

It looks like this in the above link. It cost about $280.

Labor is 1.4 labor hours.

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

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Customer reply replied 2 years ago
I think you misunderstood me, header tank as in coolant tank.
Audi Mechanic: internal88, Technician replied 2 years ago

Ok, I got it. That will be different. It sounds like a cylinder head gasket damaged.

There are two test you could confirm if is the cylinder head gasket. Will you be doing the test?

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Customer reply replied 2 years ago
What is the test?
Audi Mechanic: internal88, Technician replied 2 years ago

1. The easy fast test is to start your engine and see if there is bubble coming up in the coolant tank. If you see lot of bubble that means the head gasket is damaged. Also if you see heavy white smoke from the exhaust. That is also an indicator.

2. http://www.nationaltoolwarehouse.com/Combustion-Leak-Detector-P58326.aspx?gclid=CjwKEAiA_ra1BRDV-byb_aDqpQoSJAA-ofB9ZV3dnWIf8C-rMMPaZWTEDi_M2Itxg43Ef_dGWTjc4xoCjfbw_wcB

There is a kit out there to check if there is combustion gas leak inside the coolant system.

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