Running hot

[Cody Forbes]

I assure you Huw ol pal that the 044 pump is indeed proper for any CIS car. There's the 040 and the 044, one being the in tank version and one being the external version. They are identical in specification and rated to flow at pressures exceeding CIS system pressures. Again, the in tank version is the OE pump on a 5000 Turbo. A fuel pump is a fuel pump as long as it will flow enough fuel at high enough pressure to let the pressure regulator do its job. Flow rate is inversely proportionate to pressure (as pressure goes up, flow rate goes down) so you've got to be sure it can flow enough at 120psi for CIS and the 044 pump absolutely, unequivocally, unquestionably, can. 


On the fan noise:
Do these have the same big cooling fan resistor as the 5000's? I know on the 5000's the resistor burns out on low speed and you end up with only high speed which is very loud. Also on the 5000's there are different fan options with 3, 4, and 5 blades. The more blades the quieter the fan at similar flow rates. Perhaps the small chassis cars also have different blade quantity options to look in to?

-Cody Forbes (mobile)

> On Jun 1, 2015, at 8:41 PM, Huw Powell <audi at humanspeakers.com> wrote:
> 
> You might want to test your radiator fan sender doohickey (if that's what you mean by "new temperature sensor then you're all set).
> 
> It's a two-speed fan, and "high" is pretty loud.  "Low" is not so bad, but if the sender is partly bad you might have high only.  That makes it louder, and also a bit hotter before it comes on.
> 
> The fan should almost never come on while you are moving, but idling on an 80F+ day it will cycle on and off every couple of minutes.
> 
> I'm wary of your concept of "superior", since you already put the wrong fuel pump in your car...
> 
>> On 6/1/2015 8:23 PM, David Vanden wrote:
>> It hasn't overheated.  I refuse to drive it until I at least get the
>> radiator cleaned and install the new temperature sensor.  I removed the
>> radiator from the car.  It seems to have a lot of gook inside.
>> 
>> I just liked the idea of a superior radiator because I get annoyed with
>> it not running cooler and with the cooling fan coming on so frequently.
>> I figured if there was a way to quiet the cooling fan and not be so
>> reliant on it it would be cool
>> 
>> On Mon, Jun 1, 2015 at 8:01 PM, Huw Powell <audi at humanspeakers.com
>> <mailto:audi at humanspeakers.com>> wrote:
>> 
>>    This Nissen's:
>> 
>>    http://www.partsgeek.com/catalog/1987/audi/4000_quattro/cooling_system/radiator.html
>> 
>>    is what people have been using "forever".  Direct fit, but does
>>    require a "universal" corrugated top hose since for some reason the
>>    hose nipple is a couple of inches further from the engine.
>> 
>>    I cut two original hoses and joined them with a stainless steel
>>    barbed fitting, but that's not necessary, it was just fun to do.
>>    And cheaper.
>> 
>>    I don't know if people have used the other radiator shown there.
>> 
>>    Has your car overheated yet?
>> 
>>    - Huw
>> 
>> 
>>    On 6/1/2015 6:26 PM, David Vanden wrote:
>> 
>>        This question may be perhaps rhetorical but did anyone install a
>>        Flex A
>>        Lite universal fit radiator, see significant improvement, and do
>>        so without
>>        spending a lot of money on mounting hardware?
>> 
>>        On Sun, May 31, 2015 at 11:57 PM, Andrew Buc <abuc at andrewbuc.com
>>        <mailto:abuc at andrewbuc.com>> wrote:
>> 
>>            Your 4kq is old enough that the odds are pretty good it
>>            needs a new
>>            radiator. I had the radiator on my ’87 4kq replaced 2 or 3
>>            years ago. In my
>>            case, the issue was coolant loss, not overheating (I started
>>            carrying jugs
>>            of coolant in the trunk and topping up as needed), but still.
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