Question about 2002 Audi A4

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My audi b6 randomly overheats..sometimes i get heat sometimes i dont...ive replaced t-stat, waterpump, bothe temp sensors, and fixed all leaks....dont know what else to do?

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Hello daonlymw1

Here is a simple process that will walk you through a few steps that will pinpoint the problem with your Audi A4, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people like you. So here is the link to:
Diagnosing an overheating engine

Anyways, if that helps you, then you can even follow me on Twitter, for more great tips and tricks that will help you save a ton of money on car repairs. that one is twitter.com/acoates23234

Thanks for asking, and good luck!

Posted on Dec 27, 2010

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Car was overheating replaced the thermostat now the heat isnt blowing hot and the car is over heating worse it's a mitsubishi galante


Could be that fan is not kicking on. check and make sure it is connected. could also be a vapor lock. some cars require bleeding water system and if so most bleeding screws are located around thermostat housing. Call local autozone and ask if your car requires bleeding water system....NOW the overheating could be from fan not kicking on and the best way to find out is to turn on defrost and if fan is working it will kick on automaticaly. If it does kick on then this shows that fan is working fine but this does not mean that fan is running properly.The fan is controlled by a heat sensor which kicks the fan on when motor reaches a curtain heat range. If this sensor is not working it will cause car to overheat.... Could be also that waterpump is bad.Not all waterpumps leak when they go bad.Sometimes the impeler on the waterpump which is what moves water through the system simply stops working and this would cuase it to overheat.......hope this info helps and good luck...Please rate my post and if you need more info fill free to contact me...Need to find where leak is coming from also for this is more than likely the problem........

Aug 15, 2012 | Cars & Trucks

1 Answer

Hmedmy Audi a4 1996 2.6 litre is over heating and leaking coolant, i dont know what the problem is


More than likely they're related. First locate the leak - hose, waterpump - repair the leak & I suspect your overheating will stop. Note; you might consider replacing thermostat also, they damage easily when overheated.

Mar 06, 2011 | 1996 Audi A4

1 Answer

Waterpump not working?


Have you tested the thermostat yet? Are you "sure" it's working? That engine is NOT known for having water pump impellers going bad at all. I would believe a bad t-stat before a bad water pump. In my enperience if it's now flowing water, start there. If you can, take the t-stat out and put it in a pot of boiling water on the stove. Use a meat thermoneter, or even a cany thermometer and check the water temp. the T-stat should open up on it's own, even without water flow between 195 and 210 degrees. If it isn't, there's your problem. Start there, ESPECIALY if you "just put in a new T-stat." I've had FOUR bad t-stats brand new out of the box from 3 different suppliers in 15 days at my shop. I'm testing them before installing them now. the Stick

Dec 10, 2009 | 1991 Toyota 4Runner

1 Answer

2003 impala is it a temp sensor or cooling fan switch


Maybe your radiator is clogged flush it out.

Aug 11, 2009 | 2004 Chevrolet Impala

1 Answer

2002 corolla randomly overheats and feels like it misfires turn the heat on and engine cools down. already replaced thermostat any ideas. no leaks 98k miles


Check for collapsing (soft) coolant hose on intake side of waterpump at engine above idle rpm.
Check condition of system pressure cap.
Check operation of cooling fan/s- fan temperature sensor switch on engine may be faulty.
Check system has correct fill of coolant and no air locks exist when re-filling- bleed off any airlocks as may be necessary.
Check radiator coolant core not blocked.

Jul 17, 2009 | 2002 Toyota Corolla

1 Answer

01 jetta overheating on the highway


The most likely cause of this is the fan not kicking on... and the best place to start looking is the fuse for the rad fan (under the dash). If this is good check radiator thermo-switch... Observe the engine as it comes up to operating temp... if the fan does not kick on by about 200 degrees, disconnect the terminals at the switch and connect them together briefly. If the fan comes on then the switch is faulty, if not then suspect the cooling fan relay. If the fan runs normally but vehicle still overheats, the next thing to check is the T-stat. Feel the upper hose when at operating temp... it should be warm... if not remove the T-stat and reassemble... if the problem goes away it was your T-stat, if not it is either a bad pump, or a restricted (clogged) radiator. If the pump is not noisy or weeping coolant, it's probably OK... Hope this helps...;-)

Apr 02, 2009 | 1999 Volkswagen New Jetta

1 Answer

Overheating


Is the car-heating also staying cold while the engine is overheating ?

The waterpump is a much known cause for this type of problem with A4s and since you don't have any leakage, it's the most likely cause (especially if the car-heating is staying cold).

Shouldn't be a fuel issue.

Mar 22, 2009 | 2002 Audi A4

2 Answers

Overheating


could be a leak or crack in a radiator hose
could be water pump not working good or leaking
could be radiator leaking
could be thermostat half blocked

Jul 17, 2008 | 2001 Audi A6

3 Answers

Location of thermostat and replacement


Finding the thermostat is easy. Just follow the top radiator hose back to the engine.
The question I have is how to get to the bottom screw of the thermostat housing.

Any Sugustions anyone?

Jun 22, 2008 | 1999 Volvo S80

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