Overheating bora. Fan not working

[graeme86]

Read this:

http://uk-mkivs.net/forums/t/59897.aspx

Absolute bloody disgraceful design on the part of VW

[WhO]

Sorry to bump an old thread but does anybody know if just one or both fans turn on with the a/c? I've found that with the a/c on my bora only turns on the smaller fan onto low speed untill things obviously heat up when both fans kick in and onto high speed.

[h100vw]

Sorry to bump an old thread but does anybody know if just one or both fans turn on with the a/c? I've found that with the a/c on my bora only turns on the smaller fan onto low speed untill things obviously heat up when both fans kick in and onto high speed.

That would probably be correct.

Gavin

[WhO]

Hmmm had a closer look at the fans today because the car started overheating, looks like the larger fan isn't working at all anymore. If i spin it manually it'll sometimes spin up for brief period then stop.

Anybody recommend anywhere in Adelaide i could get a set of fans?

Cheers,
Robert

[h100vw]

Hmmm had a closer look at the fans today because the car started overheating, looks like the larger fan isn't working at all anymore. If i spin it manually it'll sometimes spin up for brief period then stop.

Anybody recommend anywhere in Adelaide i could get a set of fans?

Cheers,
Robert

Tim at Volkstorque or Volksfactory would be my first phonecalls. Just confirm it's not the fan controller near the battery first or the fan switch in the radiator.

Gavin

[WhO]

Well after a bit of fiddling i've got the large fan working properly again... for how long im not sure but i'll check it every day and keep you updated to see how long the fix lasts.

Its a bit crude of a fix but after reading the thread http://forums.tdiclub.com/showthread...hlight=vag-com (excellent excellent source of information) i decided to try a few things before pulling the fans out.

After confirming on my partners bora that both fans should come on together on both low and high speeds i was fairly satisfied that on mine the issue would be with the large fan.

After confirming that the large fan was infact getting voltage thus eliminating anything on the car side i tried tapping the fan whilst it was meant to be running. No dice so i tried pulling at it gently and hey presto it would very gently try to turn. This gave me the impression a brush may be stuck and not contacting the comutator properly or gunk may be in there disrupting the contacts.

Possibly not the greatest idea / fix (but used to worked on R/C cars so i figured worth a shot), i then pumped the fan motor full of wd40 hoping that it might be a sticky brush or some gunk on the comutators. After this the motor still didnt really want to work so enter me firmly but gently hitting it with length of wood. After a good bit gentle persuasion it slowly jumped into life and progressively got stronger and stronger.

The fan now runs strongly on both low and high speeds, i reckon i'll keep the wd40 in there for a lil while to try and clean out the gunk and then i'll pump it full of contact cleaner to clean it up.

A note on wd40 is its non conductive so safe to use around electronics, thus why back in the day i used to use it on remote control servo's if they ingested water.

Hopefully this solves my issues! If not i'll be pulling the fan out and apart to properly diagnose it.

Cheers,
Rob

[Jmac]

Yeah mate thats right its the goods, anyway does sound you have a bad point in your fan at least one anyway, these fans do in fact overheat the fusebox on the battery. The fuse box is the quick fix but in the end its normally the shorting fans thats the issue, i remember tripping over plenty in the VW warranty cupboard
good luck
Jmac

[Bora Sport]

Read this:

http://uk-mkivs.net/forums/t/59897.aspx

Absolute bloody disgraceful design on the part of VW

The fans stopped working on my Bora 4Mo some years ago. It got hot when I was going up to Mount Glorious.

I got the above modification done (It cost less than $150.00 as I recall) and I still have the original fans in my car (2001 with 170,000k's) with everything still working as it should.