captainredeye 0 Posted July 30, 2015 (edited) My radiator fan comes on as soon as the ignition is on, would any one hazard a guess and say this is the yellow sensor playing up. Edited July 30, 2015 by captainredeye Quote Share this post Link to post Share on other sites
robrado974 1 Posted July 30, 2015 I think it's the yellow one yes . Or the sender that goes into the rad could be at fault . Quote Share this post Link to post Share on other sites
fendervg 29 Posted July 30, 2015 I had an issue where the fans would keep running with the ignition switched off and it was the sensor in the radiator, so worth checking both that one and the yellow one in the thermostat housing. Quote Share this post Link to post Share on other sites
captainredeye 0 Posted August 3, 2015 Just replaced both sensors and no joy, guessing it's an earth problem. Quote Share this post Link to post Share on other sites
captainredeye 0 Posted August 22, 2015 Just got it sorted someone (not me for once) had swapped the black plug with the plug for the intake manifold sensor. Quote Share this post Link to post Share on other sites
fendervg 29 Posted August 22, 2015 Good news. At least you know the sensors are new as well now for peace of mind. Quote Share this post Link to post Share on other sites
Philuk 0 Posted January 3, 2016 Mine seems to read over 100 at the gauge, but the fans haven't kicked in, I have had the rad fan switch out and heated it up and he fans came on, I replaced all the 3 sensors but have bought a febi 4 pin one for the ecu incase it was that, but after reading again it's the next one on to the left that runs the gauge? Is that right Quote Share this post Link to post Share on other sites
swiftkid 1 Posted January 3, 2016 Gauge is run by yellow temp sensor. Black is fan speed 3 and blue is ecu (2 pin normally, 4 if it's a/c). Have you had vag com plugged in and seen what temp that says it is for comparison? Quote Share this post Link to post Share on other sites
Philuk 0 Posted January 3, 2016 Got a lad with vag com coming next Saturday so I can find out then Quote Share this post Link to post Share on other sites
KARMANN 0 Posted January 22, 2016 I have noticed that the fans in my VR come on but only run for 5 seconds at a time then cut off and within a minute they come back on again only for about 5 seconds and the process repeats over and over. I also noticed after a long journey they come on once the ignition is switched off but again it's only for a handful of seconds. Where should I start to check? Fraser Quote Share this post Link to post Share on other sites
Chuggs1 10 Posted January 22, 2016 I have noticed that the fans in my VR come on but only run for 5 seconds at a time then cut off and within a minute they come back on again only for about 5 seconds and the process repeats over and over. I also noticed after a long journey they come on once the ignition is switched off but again it's only for a handful of seconds. Where should I start to check? Fraser Me too - just noticed this the other day - parked up after a drive in heavy traffic and temp was getting around 100 but on turning ignition of fan was on for a few seconds then went off - watching this thread for info Quote Share this post Link to post Share on other sites
g0ldf1ng3r 13 Posted January 22, 2016 I have noticed that the fans in my VR come on but only run for 5 seconds at a time then cut off and within a minute they come back on again only for about 5 seconds and the process repeats over and over. I also noticed after a long journey they come on once the ignition is switched off but again it's only for a handful of seconds. Where should I start to check? Fraser that sounds about right fraser the fans will only come on when required & for as long as required. the timings would be controlled by the temp sensors I believe & fans will only come on as & when necessary what else makes you think you have an issue? are you seeing odd temps? Quote Share this post Link to post Share on other sites
g0ldf1ng3r 13 Posted January 22, 2016 (edited) Me too - just noticed this the other day - parked up after a drive in heavy traffic and temp was getting around 100 but on turning ignition of fan was on for a few seconds then went off - watching this thread for info relax david they are meant to do that :) lol similar to the aux water pump - which is designed to run after engine switch off so as to circulate coolant round the system to aid cooling of the block if the temps sensors say it needs it. the VR block has lots of very small water channels for the coolant to flow through to aid removing the heat - IIRC this is why you should never use a product like rad seal as it blocks the said water channels if you read the definitive cooling guide on here I think that states at what temps each of the 3 stages of fans kick in - EDIT ha ha ha sorry guys only just realised this post was on the cooling guide thread lol Edited January 22, 2016 by g0ldf1ng3r Quote Share this post Link to post Share on other sites
Chuggs1 10 Posted January 22, 2016 relax david they are meant to do that lol similar to the aux water pump - it is designed to run after engine switch off so as to circulate coolant round the system to aid cooling of the block if the temps sensors say it needs it. the VR block has lots of very small water channels for the coolant to flow through to aid removing the heat - IIRC this is why you should never use a product like rad seal as it blocks the said water channels Thanks for that... I wasn't sure if it was a problem then saw the latest post on this thread and thought I would check.... Cheers again Quote Share this post Link to post Share on other sites
g0ldf1ng3r 13 Posted January 22, 2016 Thanks for that... I wasn't sure if it was a problem then saw the latest post on this thread and thought I would check.... Cheers again no probs m8 - happy to share the love of the info there are quite a few quirky things with our VR's but they are there for a reason mostly I really like the programmable intermittent wiper function for example & use it a lot :) Quote Share this post Link to post Share on other sites
KARMANN 0 Posted January 22, 2016 No problem, I will keep an eye on it. There's a slight leak at the top of the rad and I have noticed that the temps can hit 100-110c in traffic. Fraser Quote Share this post Link to post Share on other sites
g0ldf1ng3r 13 Posted January 22, 2016 No problem, I will keep an eye on it. There's a slight leak at the top of the rad and I have noticed that the temps can hit 100-110c in traffic. Fraser those temps are normal for a VR m8, I get the same. normally the fans will kick in before water temps reaches 110 & bring it down a little, as per what the sensors & 3 stages of fans are meant to do :) also, FYI I had a new thermostat fitted about 10k ago when stealth did my engine work & new stats are engineered by VW to sit around 90 as standard on the dash gauge pls bear in mind the part I wrote about rad seal products if your rad is leaking Quote Share this post Link to post Share on other sites
KARMANN 0 Posted January 24, 2016 Yeah, I'll not be adding rad seal to the engine. The car goes in to the body shop tomorrow and I'll be switching the bumper over once it's back. I'm tempted to replace the rad with an aluminium one. Anyone got any experiences with them? Fraser Quote Share this post Link to post Share on other sites
VAG-hag 0 Posted February 2, 2016 Can anyone confirm if part number 6U0919501B Is compatible with the vr6? I ordered it in a rush :( Quote Share this post Link to post Share on other sites
KARMANN 0 Posted February 6, 2016 Going to replace the radiator in the VR, the current one has a slight leak that the top. Thinking about an aluminium one. Has anyone fitted one or could recommend any particular one to fit? I see there are millions on eBay. I would also consider fitting one that comes with fans. Any help appreciated. Fraser Quote Share this post Link to post Share on other sites
Cressa 44 Posted February 6, 2016 That's about how long mine run for. Seems ok with mine as it keeps the temperature down when needed. Quote Share this post Link to post Share on other sites
clumpy1 11 Posted February 6, 2016 Going to replace the radiator in the VR, the current one has a slight leak that the top. Thinking about an aluminium one. Has anyone fitted one or could recommend any particular one to fit? I see there are millions on eBay. I would also consider fitting one that comes with fans. Any help appreciated. Fraser Ahh the joys of owning a fettled car and trying to determine what's been done etc. Fraser if you do decide to fit a radiator and run the spal fans I have the spal mounting brackets which ChrisL done a small batch of I won't be needing them so if you do let me know hope you are enjoying the car👍 Quote Share this post Link to post Share on other sites
KARMANN 0 Posted February 6, 2016 Hi James, yeah the cars been good. Useless in the wet weather though. It's just back from the body shop getting all the rust cut away and fixed. So it's in the garage ready to go back together, but I'm wanting to address any issues while I'm putting everything back on it. If I change the radiator, I will go for and aluminium one, will these brackets fit or would it only fit the standard VW rad? I noticed Vaghag had to get a special bracket from Chrisl for his radiator. Fraser Quote Share this post Link to post Share on other sites
clumpy1 11 Posted February 6, 2016 I believe that's the one I have though maybe one or both of the Chris's can confirm.I'll be in touch regarding Door cards if you are still interested in time Quote Share this post Link to post Share on other sites
KARMANN 0 Posted February 7, 2016 There's a good chance I will take these brackets off you anyway. Could you pm me a price? God don't tempt me with door cards please!! Fraser Quote Share this post Link to post Share on other sites
