Oil in the coolant

Bernie Benz b.benz at charter.net
Fri Apr 17 06:56:01 PDT 2009

If you’re using or reusing a metal head gasket, use a thin film of Si  
caulk around the water and oil passages, both sides.


On Apr 17, 2009, at 1:21 AM, P. A. wrote:

> Thanks for the feedback. I'm afraid the head is coming off then.  
> The last
> time the head was off was 60K ago w/ a full bottom/top end rebuild.  
> Decked
> the head, Raceware head studs, new coolant etc. And since the turbo is
> working fine I guess the head gasket remains the likely culprit.
> Thanks,
> Patrick
> On Thu, Apr 16, 2009 at 4:41 PM, Austin Calise  
> <yoda_audi at yahoo.com> wrote:
>> Patrick, the only other way coolant could mix with oil is if the  
>> turbo
>> center housing water jacket cracked. Did you flush the cooling  
>> system good
>> after you last rebuild?
>> It's probably a bad HG/warped head. Was the head resurfaced and  
>> the block
>> cleaned well before assembly? Might consider getting some ARP head  
>> studs so
>> you don't have to buy new head bolts again.
>>         HTH's Austin
>> --- On Thu, 4/16/09, P. A. <sleepyq2227 at gmail.com> wrote:
>> From: P. A. <sleepyq2227 at gmail.com>
>> Subject: Oil in the coolant
>> To: "200q20v at audifans.com List" <200q20v at audifans.com>
>> Date: Thursday, April 16, 2009, 5:27 PM
>> OK guys, what ways, other than a bad head gasket, can oil get into  
>> the
>> coolant system? I have the UrS metal head gasket on the car  
>> (installed at
>> last timing belt job) which is fairly bullet proof from what I  
>> hear from
>> the
>> UrS guys. But I've got oil floating in my coolant reservoir and am  
>> trying
>> to
>> think of all the other ways that oil can get into the system.  
>> Could a bad
>> seal/bearing in the turbo allow it's cooling water to get into the  
>> oil?
>> Thanks for any ideas of what else to consider before I pull the head.
>> Patrick
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