Question about 1993 Audi 90

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1993 audi 90 CS overheating

Overheating. My teenage son's car. Radiator fans may not have been working. Overheating since I had the radiator fixed for a leak in the winter. Seemed like it was ok for awhile then it dropped coolant this last week (as it has gotten warmer in Michigan). Now it also makes more noise. He may have been running it dry and has caused the water pump to leak. Just getting into it. Fans work but there was no relay in the position #11. Joined Alldata but the info is just not enough. Thinking about getting the factory service manuals on CD. Jerry in Michigan

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Be careful overheat expensive dont drive ok let it cool fill with water let idle watch gaugers and if it gets to three quarters on gauge and no fan problem if you have alight let run half hour from cold no fam same look for stuff unpluged let me know

Posted on May 27, 2009

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1993 audi 90cs The temp gauge and the oil temp Guage both are blinking and it's over heating within 5 min of driving!the 2nd relay that says "Radiator fan relay" is missing!


Are they blinking from the moment you start or only after it's overheating? Replacing the relay as well as addressing any other obvious stuff would be the first step. Check coolant level and condition, assure the pressure cap is good and there's no leaks.

Jun 15, 2015 | 1993 Audi 90

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1993 audi 90cs is overheating fast and I don't think the fan is coming on! What do I do?


First of all check the fan fuse to c if it's ok if it is then replace your fan switch on the side of the radiator cause that tells the fan when to come and it's a common fault on most vw cars if all else fails u will need to test and c if the fan is still working,u can check that by either putting direct power to the fans wiring if it does work then change the thermostat

Jun 15, 2015 | 1993 Audi 90

1 Answer

Why is my 1993 Audi 90cs overheating?


There are dozens of possibilities from as simple as a bad pressure cap or low coolant level to as bad as a cracked engine block. Knowing the conditions that cause the overheat would help diagnose, here's some basics--assuming the coolant is full. Only overheats at low speed is generally an airflow problem: fan not running because of a fuse, relay, temperature switch, or dead fan motor. Only overheats at high speed is generally a coolant flow problem: radiator is plugged up, faulty thermostat, water pump vanes damaged. Tell us anything you've checked, any recent repairs done, and the conditions under which it overheats.

Jun 15, 2015 | 1993 Audi 90

1 Answer

2005 audi a4 quarto 2.0 turbo. radiator fan doesn't run. ac and heater are not affected. usually the fan kicks on or stays on for a while after shutting the engine off. I checked the fuse and it is ok....


The fan doesn't always run, only in certain situations when additional cooling is needed (high load, or in stopped traffic, or when you turn off the car). Is your engine overheating?

Sep 12, 2013 | Audi A4 Cars & Trucks

1 Answer

My sons truck keeps overheating. We used a head


CLEAN RADIATOR ,CHECK FAN SYSTEM, AND LAST THING IS THERMOSTAT.

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1 Answer

How do i find the thermosatat on my 93 audi 90 cs? i want to replace it.


follow the hose from the radiator to the intake manifold thermastat will be there

Oct 21, 2009 | 1993 Audi 90

1 Answer

1993 Audi 100 - overheating then is fine for the day


check the radiator.for leak. or resovoir. If its rusty, and color of water is not a fine blue/red etc. you may need a new one

Aug 30, 2009 | 1993 Audi 100

1 Answer

Overheating


Have you checked to see if the radiator fan works? And have you checked to see if the water pump works? Two very important items key to overheating.

Jun 03, 2009 | 1990 Subaru Legacy

1 Answer

Overheating


When you mention the radiator having a hot upper in pipe and a cool bottom out pipe tells me that the coolant is not moving around the engine. This could be down to a water pump not working, blocked radiator, thermostat not opening. The bottom hose should be cooler than the top hose but once the engine is up to working temp which is around 85/90 degrees c for an audi the bottom still should be farly hot to touch. Hope this helps

Jun 01, 2009 | 1996 Audi A4

1 Answer

1993 Audi 90 cs Quattro Screwed up!!


Regarding your radiator leak, some can be fixed but plastic radiators usually get replaced. A 1993 probably would need a fan switch by now if it was never replaced especially if it's the fan switch that is screwed into the radiator and is exposed to coolant. Again, a car this old would probably need a new water pump too but screwing up the valves is definitely his fault and should pay for all repairs. I'd have someone else do the repairs like the car dealer and charge him for it! Take it to small claims court if necessary. Lastly, if you signed an invoice to just have the radiator fixed and nothing else, your case is strong. If you signed an agreement giving him permission to do "whatever needed in his best judgement", well, your case weakens a bit in regard to having all the other parts replaced but he's still a fool for bending your valves. Sorry to hear of your encounter with this. Please post the name of this shop for the rest of us will know to stay away from it.

Aug 08, 2008 | 1993 Audi 90

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