45 replies to this topic

[Tobyrm1]

Hi,

My 998cc mini has started rising above half on the temp gauge. It has had a new waterpump, radiator, and a thermostat blanking sleeve.

It has also been rolling roaded and the timing and fuelling is perfect.

I'm considering fitting a hot climate fan. Has any just had any experience of the effectiveness of one of these?

Thanks

[krusher74]

What engine spec is the 998 (mods?)

 

" It has had a new waterpump, radiator, and a thermostat blanking sleeve."  has the temp started to go up since these things were done?

 

Has the  by-pass hose been blanked? 

[Tobyrm1]

What engine spec is the 998 (mods?)
 
" It has had a new waterpump, radiator, and a thermostat blanking sleeve."  has the temp started to go up since these things were done?
 
Has the  by-pass hose been blanked? 

It has always run a little hot on the motorway but it has been getting really quite hot since a megajolt has been fitted. It has been rolling road tuned so the fuelling and timing is perfect.

[Algordo1100]

Little tip for motorway driving:  Roll down hills.  Get up to speed then take it out of gear and roll down hill with the engine idling for as long as is safe and possible. Start at 70mph and when you have slowed to the point where wagons are catching you up, its time to put it back in gear and make normal progress.

Be careful doing this, make sure there is a lot of space around you. I can't say its a particularly safe thing to do but it will significantly reduce your coolant temperature.

I always do this on a long motorway journey in a mini (and other classics)

 

Al

 

 

Edited by YetI21586

Pleas do not give dangerous advice!!

[Barman]

Little tip for motorway driving:  Roll down hills.  Get up to speed then take it out of gear and roll down hill with the engine idling for as long as is safe and possible. Start at 70mph and when you have slowed to the point where wagons are catching you up, its time to put it back in gear and make normal progress.

Be careful doing this, make sure there is a lot of space around you. I can't say its a particularly safe thing to do but it will significantly reduce your coolant temperature.

I always do this on a long motorway journey in a mini (and other classics)

 

Al

 

That sounds like terrible advice!

 

I live in Cyprus which is always hot and quite hilly - in fact extremely hilly - yet I've never felt the need to coast downhill to cool the car down...

 

There must be some underlying problem that is causing overheating on a motorway with all that air flooding through the front grille.

[Yoda]

Little tip for motorway driving:  Roll down hills.  Get up to speed then take it out of gear and roll down hill with the engine idling for as long as is safe and possible. Start at 70mph and when you have slowed to the point where wagons are catching you up, its time to put it back in gear and make normal progress.

Be careful doing this, make sure there is a lot of space around you. I can't say its a particularly safe thing to do but it will significantly reduce your coolant temperature.

I always do this on a long motorway journey in a mini (and other classics)

 

Al

 

Definitely the worst piece of driving advice i have seen for a long time. There is obviously something not right with your cooling system and needs to be checked out if the temp is getting way too high. 

 

First things to check if you are sure the system is generally good and the fan is the correct way round, but still running hot is that the radiator fins are clear. The best way to do this is to remove the rad and see if you can look through it with no parts blocked and if so a good blow through with an airline is due. If and when they are clear, flush the rad and the rest of the system to make sure there is no crud in the system. Once this has been done, you may notice a big difference. If not, then it will be time to look further.

 

Assumptions are usually to do with the water flow, but the airflow through the rad is just as important if not more so.

Edited by Yoda, 19 July 2013 - 10:32 AM.

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What engine spec is the 998 (mods?)
 
" It has had a new waterpump, radiator, and a thermostat blanking sleeve."  has the temp started to go up since these things were done?
 
Has the  by-pass hose been blanked? 

It has always run a little hot on the motorway but it has been getting really quite hot since a megajolt has been fitted. It has been rolling road tuned so the fuelling and timing is perfect.

 
If it is only since the megajolt has been fitted, that would suggest something isn't right. Fitting that item alone would not cause over heating

[Tobyrm1]

 

What engine spec is the 998 (mods?)
 
" It has had a new waterpump, radiator, and a thermostat blanking sleeve."  has the temp started to go up since these things were done?
 
Has the  by-pass hose been blanked? 

It has always run a little hot on the motorway but it has been getting really quite hot since a megajolt has been fitted. It has been rolling road tuned so the fuelling and timing is perfect.

 
If it is only since the megajolt has been fitted, that would suggest something isn't right. Fitting that item alone would not cause over heating

Well it got a bit warm on the motorway before hand but since fitting it seems hotter (or could coincidently be just the hot weather).

[Badboytunes]

to be honest.... although there is nothing wrong with the temp on our car, I always have the heater on "hot" and when sat in traffic, I put the heater on, as this helps cooling,

 

I dont really need to but like Tesco's, every little helps

[Klevdo2202]

Maybe the gauge is inaccurate?

[Spud_133]

I woudnt worry too much if it the car isn't overheating.

[Tobyrm1]

The gauge has always been accurate before. It doesn't overheat just I feel it gets too warm!

[Da11yn]

Given how warm it has been lately i think you will find the slight rise in water temp is to due to the ambient air temperature being higher and so there is less of a  thermal gradient between the water and air and so less cooling seen.  I wouldn't be concerned unless your getting close to the red on the gauge as for optimum fuel efficiency you want to be at 90 deg. anyway.  If you are concerned, i have found fitting an auxiliary electric fan on the other side of the radiator will pull the indicated temperature down by a quarter on the motorway even when cruising at 80.

[krusher74]

 

What engine spec is the 998 (mods?)
 
" It has had a new waterpump, radiator, and a thermostat blanking sleeve."  has the temp started to go up since these things were done?
 
Has the  by-pass hose been blanked? 

It has always run a little hot on the motorway but it has been getting really quite hot since a megajolt has been fitted. It has been rolling road tuned so the fuelling and timing is perfect.

 

There are different perfects, you could have a spark map (witht he megajolt) that gets best peak HP, or gets best mpgs. or both etc.

 

If you spark timing is now spot on it may be com-busting the fuel better, and more power can = more heat. So its just a slight bi product of your engine tune.

 

If its not overheating it not really a worry. 

 

But as you are worried you could try a coolant system flush to get the cooling running 100% and then with the new water add http://www.redlineoi...ts.aspx?pcid=10

 

 

As for rolling down hills, I think that's a terrible unneeded idea, when your going down a hill your engine will need to produce very little energy to do so and in producing very little energy it produced very little heat. As one person said you can turn on your heaters to aid the cooling.

[Tobyrm1]

Thanks for all your replies. I know the coolant is new and is of the correct concentration. It will tick over fine without getting hot at all and any speed up to 50mph it will be fine but when it goes over that the temp begins to rise.