1986 4000cs AC

[Ti Kan]

Keith Davidson writes:
> A few questions
> 1 ) My radiator fan is getting twitchy on me. I get a replacement on monday. 
> Should I install a switch to keep the fan on when I am driving all the time 
> ? Or let the rad. fan switch do it`s job ?

As Brett said, keep it working the way it was intended.

> 2 ) If not enough air is pulled through with a  'stock fan' is there a more 
> efficient replacement fan to use ? This also helps cool the AC for me 
> ,correct ?

4-cyl or 5-cyl car?  If 4-cyl, you have the dual fan setup, which
should be plenty good, and there is really no upgrade.  The 5-cyl car's
radiator fan motors won't fit.  The secondary fan is belt-driven fropm
the primary one, so check the belt's condition.

> 3 ) Just a thought ,would an oil cooler work to keep everything cool ? Has 
> anyone added an oil cooler to their Audi ?

Again, 4-cyl or 5-cyl?  4-cyl cars already have an oil cooler -- it's
the oil-to-water exchanger sandwich on which the oil filter is mounted.

> 4 ) It seems to me that my AC system is cycling through more often. Would 
> this mean my R-12 is getting lower ? And how would I measure that ?

Probably R12 charge getting low, causing the low pressure switch to
cut out the compressor.  Go to an AC shop who would have the proper
equipment to handle that.

-Ti
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