Post #1
hi, reacently bought a 306 gti-6, everything about the car is good except for the fact that it overheats quickly, only one radiator fan ever comes on and only after the tempereture passes 110, then it goes back down to 110 and the fan turns off, then overheats again and so on... shouldent the fan come on at 80 or something? and i think i spoted 3 fans there, why is only one coming on? also noticed that the coolent is brownish color, the guy i bought it from says it could be from rust as the car has been standing for a while. any ideas? thanks
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displaying posts 1 to 25 of 34
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| Author | Subject: overheating, only one fan comes on at 110! |
 iisdaone
Newbie  Location: london Registered: 01 Oct 2008 Posts: 21 Status: Offline |
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 Posted 1st Oct 2008 at 04:12
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daveyboy
aka Jim Davey  Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #2
Does the other fan work if you put a 12 volt supply on it? And if I were you I would flush that old coolant out and refill it with fresh coolant.________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 1st Oct 2008 at 04:16
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willygti
Seasoned Pro  Location: Exeter Registered: 08 Oct 2007 Posts: 5,024 Status: Offline |
Post #3
turn car on, unplug the brown sensor on the thermostat housing and both fans should kick in instantly. then report back  ________________________________________ Team Ducati 7482003 Subaru Impreza STi |
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Posted 1st Oct 2008 at 04:17
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iisdaone
Newbie Location: london Registered: 01 Oct 2008 Posts: 21 Status: Offline |
Post #4
where would i find the thermostat? |
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Posted 1st Oct 2008 at 04:20
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willygti
Seasoned Pro Location: Exeter Registered: 08 Oct 2007 Posts: 5,024 Status: Offline |
Post #5
iisdaone wrote: where would i find the thermostat?  the middle plug ________________________________________ Team Ducati 7482003 Subaru Impreza STi |
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Posted 1st Oct 2008 at 04:26
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iisdaone
Newbie Location: london Registered: 01 Oct 2008 Posts: 21 Status: Offline |
Post #6
ok thanks, i tried it, the fan did switch on, i think only one switched on, its too dark, i cant see a damn thing, ill try again in the morning and get back to you, what would it mean if only one switched on? and is it ok to leave this plug disconnected all the time so the engine stays cool? thanks |
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Posted 1st Oct 2008 at 04:43
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willygti
Seasoned Pro Location: Exeter Registered: 08 Oct 2007 Posts: 5,024 Status: Offline |
Post #7
If you unplug that brown swithch both fans should kick in on full speed.Yes it's ok to leave it unplugged, but obviously its not a proper solution. ________________________________________ Team Ducati 7482003 Subaru Impreza STi |
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Posted 1st Oct 2008 at 04:46
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iisdaone
Newbie Location: london Registered: 01 Oct 2008 Posts: 21 Status: Offline |
Post #8
ok tried it today, only one fan comes on, the one on the left looking at the car from the front. what could this mean? |
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Posted 1st Oct 2008 at 12:59
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willygti
Seasoned Pro Location: Exeter Registered: 08 Oct 2007 Posts: 5,024 Status: Offline |
Post #9
It means that the right fan is probably buggered. Easiest solution is buy a second hand replacement twin fan setup ________________________________________ Team Ducati 7482003 Subaru Impreza STi |
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Posted 1st Oct 2008 at 16:34
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iisdaone
Newbie Location: london Registered: 01 Oct 2008 Posts: 21 Status: Offline |
Post #10
im just happy that its not a head gasket, today driving to work with the brown plug out, temp dident go above 70 even with traffic and high revs. hopefuly its an easy fix |
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Posted 1st Oct 2008 at 19:37
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jonnyvandijk
Seasoned Pro  Location: Bungay Registered: 14 Mar 2005 Posts: 2,544 Status: Offline |
Post #11
Have you any idea what the normal running temperature is? Mine hit 110 like yours when I was in the city, was bloody cacking my pants!________________________________________ Black 306 GTi-6 175.8BHP SCA Norwich ProjectTopaz Blue 205 CTI  |
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Posted 1st Oct 2008 at 21:29
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iisdaone
Newbie Location: london Registered: 01 Oct 2008 Posts: 21 Status: Offline |
Post #12
i guess should be between 80 and 90 like all other cars |
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Posted 1st Oct 2008 at 21:33
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willygti
Seasoned Pro Location: Exeter Registered: 08 Oct 2007 Posts: 5,024 Status: Offline |
Post #13
search is your friend________________________________________ Team Ducati 7482003 Subaru Impreza STi |
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Posted 1st Oct 2008 at 21:34
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jonnyvandijk
Seasoned Pro Location: Bungay Registered: 14 Mar 2005 Posts: 2,544 Status: Offline |
Post #14
willygti wrote: search is your friend  I couldn't be arsed, but if I had id have found this: Water 82 degrees oil ~90 Mines f**ked then  ________________________________________ Black 306 GTi-6 175.8BHP SCA Norwich ProjectTopaz Blue 205 CTI |
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Posted 1st Oct 2008 at 21:50
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silver6
Seasoned Pro  Location: Registered: 12 Jan 2007 Posts: 3,202 Status: Offline |
Post #15
I thought one of the fans was for the air con, and the other for cooling the engine? Hence being able to wire up both fans for overheating if your air-can isn't going to be fixed any time soon.....Not that this really helps you, just an observation. ________________________________________ R.I.P Pete Sims aka PeteGti6/PlatinumSix |
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Posted 1st Oct 2008 at 21:55
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willygti
Seasoned Pro Location: Exeter Registered: 08 Oct 2007 Posts: 5,024 Status: Offline |
Post #16
Every 6 i've known goes slightly above 90 when hot weather is combined with hardcore traffic - even when both fans are working  And yes silver 6 only one fan is needed, the rallye only come with one as standard ________________________________________ Team Ducati 7482003 Subaru Impreza STi |
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Posted 1st Oct 2008 at 21:57
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jonnyvandijk
Seasoned Pro Location: Bungay Registered: 14 Mar 2005 Posts: 2,544 Status: Offline |
Post #17
willygti wrote: Every 6 i've known goes slightly above 90 when hot weather is combined with hardcore traffic - even when both fans are working Cheers not 110 then. I'll check the fans first.________________________________________ Black 306 GTi-6 175.8BHP SCA Norwich ProjectTopaz Blue 205 CTI |
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Posted 1st Oct 2008 at 21:57
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willygti
Seasoned Pro Location: Exeter Registered: 08 Oct 2007 Posts: 5,024 Status: Offline |
Post #18
Its if your temp is high when your driving about you need to start worrying________________________________________ Team Ducati 7482003 Subaru Impreza STi |
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Posted 1st Oct 2008 at 21:58
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jonnyvandijk
Seasoned Pro Location: Bungay Registered: 14 Mar 2005 Posts: 2,544 Status: Offline |
Post #19
willygti wrote: Its if your temp is high when your driving about you need to start worrying Seems fine when driving about, it was when I went into a multi-storey car park and I heard the noise of fans that I realised it was 110. Probabily nothing to worry about  I'll keep an eye on it. Cheers Willy________________________________________ Black 306 GTi-6 175.8BHP SCA Norwich ProjectTopaz Blue 205 CTI |
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Posted 1st Oct 2008 at 22:10
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jonnyvandijk
Seasoned Pro Location: Bungay Registered: 14 Mar 2005 Posts: 2,544 Status: Offline |
Post #20
Just been and tested mine, its exactly the same as iisdaone's problem.Gets to anything over 110, left fan kicks in (as you look at the front of the car), drops to 110, and the fan cuts out. The right hand fan does nothing. I assume this one is supposed to come on earlier? i.e. its f**ked I unplugged the brown plug and just the left fan comes on. ________________________________________ Black 306 GTi-6 175.8BHP SCA Norwich ProjectTopaz Blue 205 CTI |
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Posted 1st Oct 2008 at 22:52
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psjunkie
Seasoned Pro  Location: Halifax Registered: 31 Aug 2007 Posts: 1,565 Status: Offline |
Post #21
okay i have a p1 which also only has 1 fan. whilst stationary in trffic mine gets upto 100ish then the fan kicks in. the fans used to be always on everytime i drove her. since fittin PTFE inlet gasket and new starter motor last week they dont seem to be on anywhere as near as before which is weird as that shouldnt make a difference. think im going to change to the twin fans and bridge the wires so when they do come on it gives the rad a real good blast.i have changed coolant thermostat. would changing the rad stat help too? any ideas on the temp and fans used to been on all the time. cheers ben ________________________________________ 1997 P1 Gti 6 Charged |
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Posted 2nd Oct 2008 at 01:57
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chas
Seasoned Pro  Location: Warwickshire Registered: 31 Oct 2007 Posts: 1,468 Status: Offline |
Post #22
Mine is strange. It's behaving itself now, but from time to time (not too often), it will go to go 107 Degrees, then the high speed will kick in. But normally it will sit at 75 when driving about then go to 90-97 degrees when in town.I guess either the CTS, or the relays are at fault? As far as I can tell, both fans work. ________________________________________ Ex Owner of 2000 Phase 3 306 GTi 6 China Blue - You shall be missed1974 Triumph Stag 1989 Peugeot 205 GTi 1.6 2003 Alfa Romeo 147 JTD Lusso 2005 Mondeo Ghia X 3.0 Estate LPG |
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Posted 2nd Oct 2008 at 03:27
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danvilla2
Regular Location: Leamington Spa, oriignally Ross- Registered: 02 Jun 2008 Posts: 194 Status: Offline |
Post #23
Got the same problem as you guys. Its getting very hot, up to the Red (but not in it), then only one fan kicks I think. |
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Posted 6th Nov 2008 at 14:47
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jonnyvandijk
Seasoned Pro Location: Bungay Registered: 14 Mar 2005 Posts: 2,544 Status: Offline |
Post #24
The reason why my 2nd fan didn't come on is because its buggered. Haven't changed it yet either.________________________________________ Black 306 GTi-6 175.8BHP SCA Norwich ProjectTopaz Blue 205 CTI |
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Posted 6th Nov 2008 at 14:59
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danvilla2
Regular Location: Leamington Spa, oriignally Ross- Registered: 02 Jun 2008 Posts: 194 Status: Offline |
Post #25
I've got one fan working, the passenger side one is dead. I'm guessing this is why its going very high temp before the second one kicks in? Can you replace one or are they both attached together and not seperable? |
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Posted 6th Nov 2008 at 16:02
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