GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Topic started by: lighters on 14 July 2013, 21:38
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GOLF MK4 2000 1.8 gti
Fuses are fine.
Blowers push hot air.
Plenty of water in coolant.
Pipes have water in them.
FANS DONT WORK!
Cambelt and waterpump just been replaced
Temp usually hovers around 90c but was stuck in traffic in stop/start and it shot right up to 130 (Max) and then stayed there for quite some time and didnt go below 90C until driving and then it went around 70/90 (normal)
Dont ever recall hearing the fan start on this car (2 month) temps are fine when driving normal conditions etc as I assume the airflow is making the fans move.
Temperature sensor? http://www.ebay.co.uk/itm/VW-GOLF-MK4-GTI-AUDI-A3-AUDI-TT-TEMPERATURE-SENSOR-C408-/190286786160?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2c4df9ee70
What else should I check for / need?
Thanks, Just had cambelt done recently with a new waterpump fitted also!
i see the faq states Coolant Temp Sensor – This part is prone to failure. 2002 and older vehicles had a bad coolant temp sensor from the factory that VW updated. It was a black sensor, and now the good one is referred to as a green top coolant temp sensor. Block 011 in the VAG COM can monitor coolant temp for erratic readings. This is a 7$ part. Do not change while engine is hot.
Can I get this from vw?
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Water pump fcuked I'd say
Is the water flowing around the system?
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I had the water pump replaced (Brand new) the coolant isnt draining but when I press the pipe it gushes back up so there must be water inside the pipes? Its just not drinking any?
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Yeah sorry missed that bit about the water pump
Air lock?? :undecided:
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Check the fuses ontop of the battery that's one for the fans if that's not blown I would say you need new fans.
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Do you have climate? If so they have a history of burning out the fan modules. There was a fix on ukmkivs which involves adding in a box, I'll have a search for it when I get home (if I remember)
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I would check to see if fans work by unpluging the sensor on the radiator and bridging the plug with a wire ,if they work then its the temp sensor in the rad thats gone. This : http://compare.ebay.co.uk/like/141003935455?var=lv&var=sbar&_lwgsi=y&cbt=y&device=c&adtype=pla&crdt=0&ff3=1&ff11=ICEP3.0.0&ff12=67&ff13=80&ff14=66
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Not sure if I have climate or not! Have hot/cold blowers that just say hi/low and a botton that says econ auto etc.
Trying this now : I would check to see if fans work by unpluging the sensor on the radiator and bridging the plug with a wire ,if they work then its the temp sensor in the rad thats gone.
Cant get to it :'( any other things to try in the meantime?
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Not sure if I have climate or not! Have hot/cold blowers that just say hi/low and a botton that says econ auto etc.
Trying this now : I would check to see if fans work by unpluging the sensor on the radiator and bridging the plug with a wire ,if they work then its the temp sensor in the rad thats gone.
Cant get to it :'( any other things to try in the meantime?
I replaced mine with a new sensor, its not hard to get to by the top of the engine. it your fans not working or the water pump ,even new parts can fail. :wink: easy test is let it tick over until its over 90 and pop the bonnet and see if the fans are on and the rads hot ,if not its the fans if the rad is not to hot its your water pump. :wink:
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You have climate control. Like I said very common for the fan module to blow
This should help you out a bit
http://www.youtube.com/watch?v=Af-jT9cAioM
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and also this tells you what the nime mod is
http://www.nime.co.uk/content.php?mk4fans
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Also replace your thermostat first as why did it go down to 70. When mine used to go down from 90 normal temp i took thermo out and put it in boiling water and it did not open. Strange as it must of alway been open. :huh: If it shut it will over heat big time / it could just be faulty /common crap on most cars.
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I would check to see if fans work by unpluging the sensor on the radiator and bridging the plug with a wire ,if they work then its the temp sensor in the rad thats gone. This : http://compare.ebay.co.uk/like/141003935455?var=lv&var=sbar&_lwgsi=y&cbt=y&device=c&adtype=pla&crdt=0&ff3=1&ff11=ICEP3.0.0&ff12=67&ff13=80&ff14=66
My uncle bridged it over and the fans didnt work. What does that mean it could be?
It stays at 90c all the time but goes down to around 70ish when I had the blowers on hot at full. It also shot right up when it was overheating so im fairly sure the thermostat is working correctly?
Still waiting for a solution as the fans dont come on at all when ticking over.
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i would remove the fan and test it on a bench with a 12v battery and see if it can be fixed ,if pop to a scrap yard to get another fan.
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How easy is it to remove and test?
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I managed to get it fixed for £20.
Basically the fuse had corroded away underneath and you couldnt tell from the top so they fitted a new wire and its not working correctly!