Head gasket

[Pro-cookie]

Hi guys, went and gave car once over earlier and discovered whit stuff under oil filler cap! Only a light misting but when it was off I noticed air or exhaust gas blowing out of filling point I don’t recall if that is normal? Took the car for a drive and it doesn’t seem down on power and the misting of white stuff has gone. I’ll try and upload a video in a bit.

 

[QuattroCalum]

What engine?


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[Pro-cookie]

Hi guys, went and gave car once over earlier and discovered whit stuff under oil filler cap! Only a light misting but when it was off I noticed air or exhaust gas blowing out of filling point I don’t recall if that is normal? Took the car for a drive and it doesn’t seem down on power and the misting of white stuff has gone. I’ll try and upload a video in a bit.

 

[Pro-cookie]

What engine?


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1.8 non turbo petrol it’s avv engine code

 

[QuattroCalum]

It’s normal for some condensation build up when short journeys don’t allow the engine to warm up fully. Keep an eye on it for now, is your coolant mix strong enough?
Oil coolers are a common failure on these cars.


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[Pro-cookie]

Yes the coolant mix is good it’s the red coolant mixed at Audi garage. So you don’t think the blowing coming up through the oil filler point is anything to be worried about? I can’t remember if this is normal or not?
Trying to upload video and it’s not letting me at moment

 

[QuattroCalum]

Yes the coolant mix is good it’s the red coolant mixed at Audi garage. So you don’t think the blowing coming up through the oil filler point is anything to be worried about? I can’t remember if this is normal or not?
Trying to upload video and it’s not letting me at moment

Check this part out, another common fail item and it controls pcv function.

https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.co.uk/ulk/itm/151533017406


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[Pro-cookie]

Where about would that be? I don’t recall seeing anything like it lol

 

[QuattroCalum]

Below the inlet manifold, the elbow exiting the block breather connects to it.
As in this link, this is on 1.8t but I’m sure N/A engine is the same set up.





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[Pro-cookie]

Ok will take a look tomorrow. Thanks for the help

 

[QuattroCalum]

Ok will take a look tomorrow. Thanks for the help

You’re welcome


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[Andy avant b5]

I had a mk3 golf with the same problem was just the pcv system I removed a lot of it a fitted a catch tank stopped the condensation in the top of the engine block that causes the Mayo effect on the oil cap it's the highest part of the engine that's why it hit there

 

[Pro-cookie]

Ok thanks is it something that can be cleaned out or do they have to be replaced? And did yours blow air through the oil filler?

 

[Andy avant b5]

Didn't check to be honest how much milliage do you do a week

 

[Pro-cookie]

Well last year I did a grand total of 2700 miles lol. Most of the time it sits in the garage getting cleaned and I just make sure the battery is ok.

 

[Andy avant b5]

That will be your problem mate the car is just not getting a proper run this time of year with being cold and damp is bad take it for a good run the problem with are engines is the fans are always running which takes even longer to get to tempreture

 

[aragorn]

it'll just be the cold weather and condensation. If its not getting a decent long run to fully warm the engine thru (like 20mins+) then small amounts of white might form on the cap

 

[Pro-cookie]

Ok thanks guys I’ll take it for a long run tomorrow. There is an Audi garage in Poole I’ll pop in and get a pc valve and hope that stops blowing.

 

[Pro-cookie]

Ok guys one other thing I was doing a search for bits and I was reminded about this. What is it for? Mine snapped but I managed to repair it. Only trouble is I don’t know if it’s working correctly I thought it opened and closed when the throttle opened and shut but mine opens at about 2000rpm then stays open permanently until I switch off engine then it slowly closes usually takes a couple of hours and it’s completely shut. Is this right? And what’s it for?
Thanks in advance guys.

 

[Andy avant b5]

Sorry mate can't help that's not on a turbo

 

[Pro-cookie]

Is this anything to do with the POV valve? With the red arrow.

 

[Andy avant b5]

Do you mean pcv valve mate

 

[Pro-cookie]

Damn auto correct lol. Yes mate that’s what I meant.

 

[Andy avant b5]

I am 80% sure it is

 

[QuattroCalum]

View attachment 146572 Ok guys one other thing I was doing a search for bits and I was reminded about this. What is it for? Mine snapped but I managed to repair it. Only trouble is I don’t know if it’s working correctly I thought it opened and closed when the throttle opened and shut but mine opens at about 2000rpm then stays open permanently until I switch off engine then it slowly closes usually takes a couple of hours and it’s completely shut. Is this right? And what’s it for?
Thanks in advance guys.

Is the part number on it visible? If so take a note of it and do a search, you will find it’s name and function that way


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[Pro-cookie]

Yeah checked that and couldn’t see a anything what so ever, will keep doing the homework. Thanks guys.

 

[QuattroCalum]

Yeah checked that and couldn’t see a anything what so ever, will keep doing the homework. Thanks guys.

Post the part number and I’ll see what I can find out.


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[QuattroCalum]

Yeah checked that and couldn’t see a anything what so ever, will keep doing the homework. Thanks guys.

Here's what I found on another forum,

http://www.vwaudiforum.co.uk/forum/...mance-audi-a4-b5-1-8-20valve-engine-non-turbo