Mark.W
Member
Registered: 3rd Jan 07
Location: County Durham
User status: Offline
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When out driving the engine temprature wont cool down and sits at 100+ and when the fan kicks in near the red it doesn't really cool it down.
Personally i feel the fan should kick in before the 100 mark.
Any ideas what could be causeing it not to cool?
[Edited on 29-06-2013 by Mark.W]
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AlexW
Member
Registered: 25th Oct 08
Location: Essex
User status: Offline
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Thermostat, could be opening really late.
I'd try a new sensor (The single wire one), since it could just be that giving you false readings.
Also, the fan kicks in at a true 98degrees (and switch off at 96), I'd expect the gauge to be showing 100 or more when it does.
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Mark.W
Member
Registered: 3rd Jan 07
Location: County Durham
User status: Offline
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I thought the thermostat was at fault so bought a new one and it is still the same,also tested them in a boiling pan of water to see if they open and the new one opens very little or if at all and was causing the water in the radiator to stay cold so refitted the old one as that one opened more than the new one and the radiator gets hot evenly across now but it wont cool down when driving even with no front grill in the bumper.
Also both sensors on the termostat were replaced.
[Edited on 10-06-2013 by Mark.W]
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AlexW
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Registered: 25th Oct 08
Location: Essex
User status: Offline
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Has it had a water pump?
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Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
User status: Offline
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I'm with Alex thinking there's a block or something flow related here..
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Generation
Member
Registered: 7th Jul 09
Location: Essex
User status: Offline
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Did you bleed system? When topping up? Engine running ans on full heat etc?
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Mark.W
Member
Registered: 3rd Jan 07
Location: County Durham
User status: Offline
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New water pump was also fitted & water system bleed.
There is a sucking sound when it is revved slightly from round the ecotec & throttle body area?
[Edited on 11-06-2013 by Mark.W]
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monkeytwizzel
Member
Registered: 10th Aug 11
Location: Chard, Somerset
User status: Offline
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Is the coolant circulating ok all pipes getting hot and the rad hot all over?hot air coming from heater blower.
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Jamie-C
Member
Registered: 3rd Jun 08
Location: Ballycastle
User status: Offline
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Put a cool running stat into it
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Generation
Member
Registered: 7th Jul 09
Location: Essex
User status: Offline
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Double check your hoses are correct
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Mark.W
Member
Registered: 3rd Jan 07
Location: County Durham
User status: Offline
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All pipes get hot with the old thermostat refitted but wasn't with the new one and the radiator gets nice & hot right across with the old thermostat but would stay cold with the new one on & the heater in the car blows nice & hot,would it make any difference the pipes go on the heater matrix which way round they were?
And i can't really see a cool running thermostat making any difference tbh.
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Stoneyginger
Premium Member
Registered: 25th Jan 01
Location: Stonehaven, Aberdeenshire
User status: Offline
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mine used to run very hot without a cool running thermastat, try one anyway they are cheap and may solve your problem
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monkeytwizzel
Member
Registered: 10th Aug 11
Location: Chard, Somerset
User status: Offline
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The thermostat that opens more will be allowing the engine to run cooler by letting the coolant to flow faster so a cool running stat will open earlier but also may open more or have a bigger flow bore!
The heater pipes been wrong shouldn`t make any difference but you never know,did you change anything or this problem just start one day?Are you putting antifreeze/summer coolant back in when refilling?
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Jamie-C
Member
Registered: 3rd Jun 08
Location: Ballycastle
User status: Offline
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quote:
Originally posted by Mark.W
All pipes get hot with the old thermostat refitted but wasn't with the new one and the radiator gets nice & hot right across with the old thermostat but would stay cold with the new one on & the heater in the car blows nice & hot,would it make any difference the pipes go on the heater matrix which way round they were?
And i can't really see a cool running thermostat making any difference tbh.
Why not? They make them for this reason. Mine ran hot, cool running stat took it down nicely
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Mark.W
Member
Registered: 3rd Jan 07
Location: County Durham
User status: Offline
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Suppose it maybe worth trying a cool running thermostat then.Im just using plain water at the moment until it's solved so im not wasting coolant.
[Edited on 15-06-2013 by Mark.W]
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Mark.W
Member
Registered: 3rd Jan 07
Location: County Durham
User status: Offline
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Just for daftness iv been up and removed the thermostat and took it out again to see if it made much difference and when i fired it back up it was sitting at 90 as it was still warm from having it out earlier and by the time i got the garage locked and set off it sat at 95 and stayed there while out driving until i stopped then it started to creep back up but not like it was.Any other suggestions?
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Darryl H
Organiser: South Central
Premium Member
Registered: 19th Nov 09
Location: Camberley Drives: Porsche 944
User status: Offline
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I had a cool running thermostat in mine and it only went over 90 when I sat in traffic, I also mounted the radiator as close to the bumper as possible
|My Corsa|SC|My Instagram|
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Mark.W
Member
Registered: 3rd Jan 07
Location: County Durham
User status: Offline
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Did yours run hot before fitting the CRT Darryl?
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WukaChop
Member
Registered: 9th Apr 13
Location: Birmingham
User status: Offline
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Mine did this when the head gasket went, have you checked for leaks and stuff from the head?
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Mark.W
Member
Registered: 3rd Jan 07
Location: County Durham
User status: Offline
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Is it possible to have the head pressure tested on the car?
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Darryl H
Organiser: South Central
Premium Member
Registered: 19th Nov 09
Location: Camberley Drives: Porsche 944
User status: Offline
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quote:
Originally posted by Mark.W
Did yours run hot before fitting the CRT Darryl?
Had it in from the start mate so wouldn't know sorry
|My Corsa|SC|My Instagram|
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one-mr-t
Member
Registered: 4th Aug 09
Location: Greater Manchester
User status: Offline
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Fitted a cool running thermostat to mine along with new fan switch, solved my problems witch was the same
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Mark.W
Member
Registered: 3rd Jan 07
Location: County Durham
User status: Offline
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How accurate are the temp gauges in corsa B's?
Iv fitted a cool running thermostat & a 92 degree rad fan switch and the fan still doesn't come in until right near the red..........
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Aidan-Fleming
Member
Registered: 17th May 08
Location: Westhill, Aberdeenshire
User status: Offline
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But a Cool running thermostat, New Coolant temp sensor and a temperature sender. Or get some Dual fans
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Mark.W
Member
Registered: 3rd Jan 07
Location: County Durham
User status: Offline
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Think i may have sorted it.
The temp sensor on the thermostat that gives the reading inside the car on the clock has been faulty,Iv borrowed a spare one off a mate and the car sits at 90 degrees now when out driving instead of it shooting straight up to 100 and staying there and the fan kicks in at 92 degrees like it should and cool it down a bit more 
[Edited on 29-06-2013 by Mark.W]
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