[V8] cooling troubleshooting & temp sensors

[Ingo Rautenberg]

Be very careful wrt viscous clutch failure. I replaced mine and it  
was NOT the problem.  The viscous clutch only works if there is  
enough heat dissipated from the radiator.  If the radiatror is in any  
way clogged or otherwise has cold spots, even a perfect viscous  
clutch will not  fully engage.  Found this out when I bought my  
infrared thermometer.

Can't cool something that isn't hot to begin with...

Ingo

On Aug 21, 2008, at 11:28 AM, Kneale Brownson wrote:

> Is there a way to diagnose viscous fan clutch failure?  Just watch  
> as the engine speed is increased?
>
>   My recollection of the majority of V8 overheating threads is that  
> the solution lies with radiator replacement with an OEM radiator,  
> not some aftermarket item.
>
> urq <urq at pacbell.net> wrote:
>   We don't know much about the problem symptoms ... but the first  
> overheat
> mechanism I became aware of for the V8Q was a failure of the  
> viscous clutch
> that drives the cooling fan ... not sure I'd immediately jump to  
> testing
> sensors as on the V8 the electric cooling fan is almost a secondary
> mechanism ...
>
> Steve B
> San Jose, CA (USA)
>
> -----Original Message-----
> From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On  
> Behalf Of
> Ed Kellock
> Sent: Thursday, August 21, 2008 5:28 AM
> To: tlastre01 at sprintpcs.com; V8 at AUDIFANS.COM
> Subject: Re: [V8] cooling troubleshooting & temp sensors
>
> Here's a link to the article...
>
> http://web.archive.org/web/20070407115156/www.audifans.com/twiki/ 
> bin/view/Au
> di/HotRunningTempSensors
>
>> -----Original Message-----
>> From: v8-bounces at audifans.com
>> [mailto:v8-bounces at audifans.com] On Behalf Of tlastre01 at sprintpcs.com
>> Sent: Wednesday, August 20, 2008 8:14 PM
>> To: V8 at AUDIFANS.COM
>> Subject: [V8] (no subject)
>>
>>
>> Hello all listers.
>>
>> I use to hang out here a while back and the help I received
>> was enormous and I thank you once again for all of it. Once
>> again I seek your wisdom. There is an article RE: V8
>> overheating somewhere and it goes into troubleshooting by
>> eliminating sensors etc. Does anybody remember or have any
>> idea what I'm talking about? Any help as always will be
>> greatly appreciated. My friend has overheating problems with
>> his V8, I'm helping out.
>>
>> Best regards to you all (you too Ron) and thank you.
>>
>> Tomas
>> --------------------
>> Sprint PCS Mail
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>
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