quattro Digest, Vol 129, Issue 5

[Christopher Gharibo]

Huw, thank you for your insight. I do have an IR thermometer. 

What's the operating temperature range for the vintage, NA I5 cars for hot days? What lines does that correspond to on the temperature gauge that can be considered normal? 

My '91 CQ temp gauge can get to the first thin line after the heavy line, corresponding to just past 12 o'clock on a 90-100 degree F day. 

> On Jul 2, 2014, at 3:00 PM, quattro-request at audifans.com wrote:
> 
> Message: 2
> Date: Wed, 02 Jul 2014 11:59:30 -0400
> From: Huw Powell <audi at humanspeakers.com>
> To: quattro at audifans.com
> Subject: Re: '91 CQ Temp Gauge - when should we be alarmed?
> Message-ID: <53B42C62.7060900 at humanspeakers.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
> 
> If it's anything like my 90Qs, here is my breakdown:
> 
> First heavy line (about 1/3 of gauge): T-stat opens just below this. 
> Low fan comes at or just above it.  "Standard operating temperature".
> 
> Two fine lines higher, at about 2/3 of gauge, the line has two dots 
> around it.  This is where the high speed fan kicks in, IIRC.
> 
> Then comes another thick line, I suspect that to the right of that 
> should be colored red.
> 
> Get a $20 IR thermometer at harbor freight like I did and check head 
> temps for real world data.
> 
> - Huw