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Author Subject: Overheating
Chr1sch

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Location: Worcester

Registered: 02 Aug 2014

Posts: 1,025

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Post #1
Hi guys,

Sorry for all of the questions,

I've started to give the car some beans now and I've noticed when really pressing on the temp hovers around 80 but in traffic today it shot well towards 100 and smelled hot..

It's got a Nissens rad and i think I can see one small fan through the bumper however it's generally running hot unless travelling a speed.

It's also got an oil cooler but it's not plumbed in right now, (I have fittings)

So as a track car it needs to run cool and I do intend to drive it on the road sometimes too, so what do you recommend to improve this?! What's worked for you?

Chr1sch has attached the following image:

Posted 12th Aug 2014 at 22:02
jamiek_uk2000

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Location: Llanelli

Registered: 18 Apr 2009

Posts: 1,925

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Post #2
How hot is hot? The second fan doesn't kick in till 97 (IIRC) but it looks like it is going to boil over. Is it a GTi6 or Rallye?

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306 GTi 6 Diablo - Being resurrected! Project Thread

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Posted 12th Aug 2014 at 22:15
fatlapit

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Location: STOCKSFIELD

Registered: 02 Nov 2010

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Post #3
Aye sounds right. Also you dont wanna run cool. You need to run at what peugeot designed it to run at which i think is 88ish

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Posted 12th Aug 2014 at 22:17
jamiek_uk2000

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Location: Llanelli

Registered: 18 Apr 2009

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Post #4
If your car runs cool on track, your not going fast enough...

________________________________________

205 GTi Red - G939 RTU - Died!
306 GTi 6 Diablo - Being resurrected! Project Thread

Looking for:
VTS P1 Rack
PR1.2 16"
Posted 12th Aug 2014 at 22:23
mik

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Location: Kent

Registered: 17 Feb 2011

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Post #5
Mine gets over 90 in stop-start clutch in-out traffic in summer, this is normal. Does it go anywhere near the red zone on the gauge? If not it is OK. A correct coolant mix does not boil until over 100 dec C anyway.

Does the fan come on? Let it idle until it gets close to 100. If it doesn't come on then, get it sorted.

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Posted 12th Aug 2014 at 22:42
Chr1sch

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Location: Worcester

Registered: 02 Aug 2014

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Post #6
That's great thanks guys, it's a partially stripped gti-6 rather than a Rallye, temp wise that sounds ok then which is pretty reassuring!

Is it worth installing the oil cooler pipe work given that the rad is already fitted? (Mocal I believe)

I can't see a second fan through the bumper, should there be one?!
Posted 12th Aug 2014 at 22:48
Day666

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Location: Bristol

Registered: 20 Apr 2013

Posts: 5,214

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Post #7
Mine does the same ...did change the Thermostat to a genuine peugeot 6 one & flushed the system through with a hose with the thermostat out...
Used new coolant & water mix ....did help a bit ...no major change noticed untiil I rant it at Castle Coombe & it did help Thumbs up
Posted 13th Aug 2014 at 17:38
doon1988

Regular

Location: Sheffield

Registered: 08 May 2011

Posts: 457

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Post #8
Mine isnt track but same issue. Rns normal but hit traffics and boom shoots up.found the issue being that my fans don't actually come on. Have you run yous up to temp then got out to let it warm up more and see if your fans actually come on?
Posted 13th Aug 2014 at 18:12
Chr1sch

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Location: Worcester

Registered: 02 Aug 2014

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Post #9
No I haven't but I really don't think my fan is coming on?!
Posted 13th Aug 2014 at 19:59
bigbadbowen

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Location: Winchester

Registered: 21 Nov 2003

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Post #10
Unplug the brown sensor on the thermostat to check fans work
Posted 13th Aug 2014 at 21:30
Chr1sch

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Location: Worcester

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Post #11
Right ok thanks, what will happen when I unplug lol
Posted 13th Aug 2014 at 23:20
bigbadbowen

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Location: Winchester

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Post #12
Fans should kick in
Posted 13th Aug 2014 at 23:33
aaron6

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Location: On the sofa in maidstone

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Post #13
The fans should come on at low speed for a few seconds and then switch to max. I have an oil cooler, but I'd only run one if you have a thermostatic sandwich plate. This ensures it warns up as normal. My oil ran at 92ish degrees on Prescott hill this year when the last 3 years I got the oil to 130. So its well worth plumbing it in.

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Posted 14th Aug 2014 at 07:08
Chr1sch

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Location: Worcester

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Post #14
Yep I defo have a sandwich plate so I'll do that. It appears to only use push fit fittings?!

I'll check the fans today as I'm very conscious i don't think it comes on. I noticed today even in cooler weather it's running at aroun 70-80 on the move but 100 when stationary
Posted 14th Aug 2014 at 07:59
aaron6

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Post #15
The 1 stage of the fans kicks in at 97. It should bring the water temp down to 90 and switch the fans off. Then the pattern repeats. If it goes above where your at, you need to look into why. Does your temp ever come back down to 90ish stationary?
Push fittings? How very strange. Should be okay though. I knew you would have a sandwich plate as tats where the hoses plumb in. But I'm recommending a sandwich plate with a thermostat as it won't take any longer to warm up in the mornings.

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See the sheer power and might of the lesser known burrowing owl.



Posted 14th Aug 2014 at 08:47
aaron6

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Location: On the sofa in maidstone

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Post #16
Is your a rallye? If so you will only run 1 fan and not have the brown sensor on the thermostat housing. It will have relays behind the grill iirc.

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See the sheer power and might of the lesser known burrowing owl.



Posted 14th Aug 2014 at 08:48
Chr1sch

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Location: Worcester

Registered: 02 Aug 2014

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Post #17
it was advertised as a gti 6 - rallye, however it has electric windows etc so i believe that means its just a gti6

Its had a million different bits put on it by various people over the years so it wouldnt surprise me if its a bit of a mish mash of parts....
Posted 14th Aug 2014 at 09:37
RetroPug

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Location: Leicestershire

Registered: 15 Jan 2013

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Post #18
Be very careful driving the car without working fans, it only has to overheat a bit a few times and you can induce HG failure.

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Posted 14th Aug 2014 at 09:46
Chr1sch

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Location: Worcester

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Post #19
So the fan works! It just came on but the dial is hilariously inaccurate, reading about 105 before it kicked in - immediately pulling temp down to 90 - I can relax now lol
Posted 14th Aug 2014 at 17:16
aaron6

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Post #20
Might not be Quite right yet. The 2nd stage of the fans where they run at full speed is at 110 degrees. You probably hit that one. Did you pull the brown sensor to check to see if they both work on slow speed? Also, hard wire the ac button to manually switch the fans on. Wink

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See the sheer power and might of the lesser known burrowing owl.



Posted 14th Aug 2014 at 19:14
Chr1sch

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Location: Worcester

Registered: 02 Aug 2014

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Post #21
I'm almost certain I only have 1 fan?!

How hard is it to hard wire the button, I like the idea as aircon is duff like most lol
Posted 14th Aug 2014 at 19:44
RetroPug

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Post #22
Is it a rallye?
As I understand it, non-aircon models only have one fan, which has a high speed and low speed setting, sure someone will confirm.

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61k miles Ph.1 Diablo '6 Project Thread
Posted 14th Aug 2014 at 19:52
aaron6

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Post #23
Do you have the ac button and associated bits under the bonnet? If so, you should have the twin fan set up. Do you have the brown sensor on the thermostat?


It's easy, disconnect the compressor, there's plug you have to bridge 2 terminals. Check the faq section. There's a decent guide in there for it.

________________________________________

See the sheer power and might of the lesser known burrowing owl.



Posted 14th Aug 2014 at 19:53
Chr1sch

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Location: Worcester

Registered: 02 Aug 2014

Posts: 1,025

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Post #24
Defo have ac, I'm pretty sure it's not a Rallye...

I'll check the FAQ,thanks all :-)
Posted 14th Aug 2014 at 21:08
cully

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Location: Cullompton

Registered: 12 Jun 2013

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Post #25
if it has AC you should have two fans
slow speed is two fans in series fast speed is two in parrellel

if one is missing you wont get slow speed!
Posted 14th Aug 2014 at 21:31

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