My 2001 audi a6 has been running hot. I think the thermostat was replaced. could it be a cooling system sensor. someone said something about the resivoir cap. just lookinhg for ideas
Hi there:the Audi manual never talks about a 2 stage aux fan just that the aux fan runs with ac on and it can run with out ac on if there is an overheat issue on the coolant side where as the a4 info clearly states a 2 stage aux fan system that would lead me to think the early 4.2 did not use a 2 stage system. Your car is not overheating and boiling over out of the coolant tank it is showing a little hotter than what would be perfect but it is still in what Audi calls acceptable range. The whole coolant system is new I would start looking at your sensor and gage systems there is a coolant sensor in the rad but that is most likely new if they replaced the rad. The gage uses a temp sensor on the engine for the gage I would replace that sensor and test the gage with a resistance input tool we have at the dealer. Could be a gouge or the wiring to it. There is a coolant fan module that could be defective if your sure there was a two speeds to the aux fan.
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My Audi 2000 a6 Quattro 2.8 just started overheating on my way up to south lake Tahoe and it has oil and antifreeze but its overheating and i dont know whats wrong any help??
SOURCE: 1996 1.8 ADR Engine Audi A6 overheating
Hi there, this could be a faulty thermostat but typically, these issues are caused by air locks in the heating system when the car cooling system is drained to take the head off.
The water pump may be working which is fine but there may be some big air bubbles in the pipes that carry the water from the engine to the heater matrix.
Have you tried without starting the car, taking off the water filler cap, not the coolant refill cap but the radiatpr cap. Not sure if this cap is actually on the radiator on the Audi or if there is one locatd closer to the thermostate housing, but once the cap is off top up the water to just below the neck and then squeeze the water hoses around the radiator to try and push water into the cooling system. You need to to squeeze quickly and with both hands to try and force water around the system and then slowly let the hose expand in your hands. Watch for bubbles coming out of the filler so that you can top up the water level again as it goes down. There will be a lot of bubbles if its really air locked and you may have to spend some time doing this. Keep toping up the water level though and once you can't seem to get any more bubbles out. Then if you can close the system again - i.e. put the radiator cap on and go for a ride. if possible find a steep incline where you can point the car up a steep incline and get the engine really reving to push the water round the system.
Go home - wait for the engine to cool and if the heater has not started to work on that trip, once the engine is cool, repeat the process with the hose squeezing to see if you can get more bubbles out, followed by toping up and so on.
If that really makes no improvement the worrys would be that your right that the thermostat could be bad although you should notice that with the temperature gauge moving up pretty rapidly and the car getting over hot if the thermostat is stuck shut. If its stuck open then it wouldn't stop the heater working it would just be slow to warm up.
It could also be the heater valve on the hot/cold switch where teh valve is not opening, and a last ditch issue would be that the water pump is not working.
My advise would be try and clear the air lock first. Also if you have a manual for the car (haynes manual), they normally talk to the correct way to refill the heating system to prevent the air locks. Some times there are venting points on the block that can be unscrewed to bleed the air out but for that you need the manual.
I hope that will at least help some - best wishes.
SOURCE: Where's the thermostat on a 96 audi a6
SOURCE: Oil questions for 2003 Audi A6 Quattro
oil type is either 5W-30W or 10W-30W depending how cold your climate is, as far as having the car properly taken care of, the Audi dealer is the best option, they have all the proper tools and service info needed to keep the car in top running condition.
SOURCE: audi a6 avant 2001 owners manual
I have me radio code, BUT on the screen it says SAFE.
Is there anyone who can tell me what i have to press on the radio to type in that code?
SOURCE: thermostat audi a6
look under car on water pump housing, the thermostat is on a metal housing that looks like an igloo and has to bolts perhaps 10mm or 13mm, and an "O" ring in between
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