[urq] Audi 10 Valve Noises

[John Koenig]

My understanding of oil specs is that the "15W" refers to the actual physical viscosity, and "40" refers to a level of performance associated with chemistry, additive packages, etc. I wouldn't think that the 15W would be enough to interfere with the operation of an otherwise healthy hydraulic lifter. 
My two cents' worth... 
Good luck! 



----- Original Message -----

From: "Stephen Kraus" <ub3ratl4sf00 at gmail.com> 
To: urq at audifans.com 
Sent: Saturday, September 21, 2013 12:00:40 PM 
Subject: [urq] Audi 10 Valve Noises 

Hey UrQ guys, 

I'm having my 2.3l 10 valve acting like a valve is stuck open at idle, and 
then at 2500-3000 I get a metallic noise. 

I'm kinda suspecting its the heavy weight oil (15w40) sticking a lifter, 
but I wanted a second opinion. 

Any ideas? 
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