Yet another c5 overheating problem...HELP!
Burning Brakes
Joined: Dec 2011
Posts: 858
Likes: 75
From: Medford, Oregon
Dude, glad to hear this. I've been following your thread for awhile and it looks like a 'win' in your corner. As for the type of screen, the finer the mesh gets, the more restrictive the air flow will become and again you might start running into possible heating issues. 1/4''x1/4'' mesh should be sufficient, but until you try different size mesh, you won't know for sure what size mesh works until you try it in real world application. You will never get air filter results from mesh, but now you know that a little periodic cleaning of those cores goes a long way. 
P.S. Did you ever have your old radiator inspected or tested for blockage, jus wondering !!
Last edited by 2FAS4UU; Apr 30, 2015 at 01:53 AM.
Melting Slicks
Joined: Jul 2013
Posts: 2,012
Likes: 23
From: Anaheim CA
Thread Starter
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Joined: Jun 2011
Posts: 67
Likes: 0
From: Westlake Village CA
Dude, glad to hear this. I've been following your thread for awhile and it looks like a 'win' in your corner. As for the type of screen, the finer the mesh gets, the more restrictive the air flow will become and again you might start running into possible heating issues. 1/4''x1/4'' mesh should be sufficient, but until you try different size mesh, you won't know for sure what size mesh works until you try it in real world application. You will never get air filter results from mesh, but now you know that a little periodic cleaning of those cores goes a long way. P.S. Did you ever have your old radiator inspected or tested for blockage, jus wondering !!
Thanks for following and for the screen/mesh advice. I figured the finer the screen, the less the flow but wanted to know if anyone had tried it. Last thing I need is another cooling issue, so I will likely buy the 1/4"X1/4" mesh at Home Depot and install that.
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Joined: Jun 2011
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From: Westlake Village CA
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 479
From: OK
Too bad more C5 owners haven't realized how important taking the radiator OUT and really Cleaning it is... 
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Joined: Jun 2011
Posts: 67
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From: Westlake Village CA
It's one of those areas/things that's easy to overlook and if you don't really know these cars inside and out, chances are it'll happen to you. I've had my C5 for four years now and I'm still learning her little quirks.
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Joined: Jun 2011
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From: Westlake Village CA
Drove the car all over yesterday in 95F+ degree heat, with and without the A/C on.
With the A/C on, the car sits at 192F while driving and when sitting in traffic, it went up to 201F and held.
With the A/C off, it sits at 192F and in traffic, slowly crept up to 221F and held. The fans don't even go on high mode.
The A/C also blows much colder with the condenser cleaned out and working more efficiently.
It's nice to have this peace of mind now!
With the A/C on, the car sits at 192F while driving and when sitting in traffic, it went up to 201F and held.
With the A/C off, it sits at 192F and in traffic, slowly crept up to 221F and held. The fans don't even go on high mode.
The A/C also blows much colder with the condenser cleaned out and working more efficiently.
It's nice to have this peace of mind now!
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Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 479
From: OK
Unless you have reprogrammed the fan turn on temps from other than factory settings, the fans don't go on even in LOW speed mode until coolant temp is 226 with AC OFF. High speed mode with AC OFF (or ON) is at 235 degrees. With AC ON the fans come on in low speed mode at 185 and in high speed mode at 235. All of this is as long as vehicle speed is UNDER 35. At speeds over 35 the fans do not run at all irrespective of engine temp.
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 479
From: OK
Drove the car all over yesterday in 95F+ degree heat, with and without the A/C on.
With the A/C on, the car sits at 192F while driving and when sitting in traffic, it went up to 201F and held.
With the A/C off, it sits at 192F and in traffic, slowly crept up to 221F and held. The fans don't even go on high mode.
The A/C also blows much colder with the condenser cleaned out and working more efficiently.
It's nice to have this peace of mind now!
With the A/C on, the car sits at 192F while driving and when sitting in traffic, it went up to 201F and held.
With the A/C off, it sits at 192F and in traffic, slowly crept up to 221F and held. The fans don't even go on high mode.
The A/C also blows much colder with the condenser cleaned out and working more efficiently.
It's nice to have this peace of mind now!
