What was the official mazda answer too...

[J.j.]

I find the best way to cool things down at a good pace is to pop the bonnet wide open and smoke a ciggarettte for 5 - 10 mins before closing it and putting it away.

 :yes
That\'s exactly what I do.  
When allowed, I\'d even leave the bonnet just clicked, not shut for like 2, 3 hours.  Found this really helped.

[Grizzly]

No i see where your coming from. Lots of air flow is always a good thing. I just do it slightly diffrently, but thats just how i am Diffrent

Just out of interest though do you have a Pfc? it is realy scary how hot the engine gets in the 30 seconds after turn off.

Chris

[ozzyvelcro]

For the last couple of miles i drive off boost open the windows then turn the
heater and fan on full blast then cook myself lol.
What use this is ive no idea as i dont have a commander yet but it surely
must reduce the coolent temp.Maybe someone on here with the commander could give it a go and see if theres any difference.

Cheers Danny

[Grizzly]

LOL.

I supose if you put the Air con on with the Heater on full blast it would take heat out of the Engines coolant and would not cook you quite as much? but then i don\'t know if the Air con will add load to the engine causing a Visous circle.

I\'ll have a Play next time its out for a run.

Chris

[Oedipus Rex]

No i see where your coming from. Lots of air flow is always a good thing. I just do it slightly diffrently, but thats just how i am Diffrent

Just out of interest though do you have a Pfc? it is realy scary how hot the engine gets in the 30 seconds after turn off.

Chris

I do mate. The water temps just rocket. To be honest its the air temps rather than the water temps that benefit from leaving the bonnet open, water temps I find the best thing is turning the engine off straight away but leaving the electrics on, waiting till it reaches 100, firing it back up till it gets to 84 (where my fans are set), turning it off, waiting till it getes to 100, firing it up, waiting till it gets to 84 and then leaving it. Only takes a couple of minutes and has a hufe effect. You can even do it while having a smoke.

[Brett]

Just been reading this thread, surely if you drive sedately for the last 5mins of your journey the engine/turbo\'s/oil will have cooled sufficiently to prevent any damage?  
 Obviously you will get heat spike when you stop moving due to no air flow, and again when you switch off the engine, but that spike only lasts a relatively short amount of time.  If your car is still suffering after those steps then surely there is something fundamentally wrong anyway?

[Grizzly]

Best thing to do is get a form of metering Divice (power FC hand set etc) and see it for your self. I have seen water temps as high as 120 on a hot day when i have left for 20 seconds to cool down. Some of the Temps are quite scary and i think Oedipus rex is Spot on with what he does to cool down.

I think 5 minutes of slow driving when you\'ve been hamering your car may not be close to enough to stop the Temps rising dramaticly on Turn off.

Chris

[Sy.]

sorry i must have missed something ... but why does the car temp raise so much when it is switched off .. a normal turbo run down should be ok, shouldnt it .

As you guys are getting me worried !! lol

[Grizzly]

How it basicly works is the engine uses the water system to keep the temps down to a safe level. Becouse water absorbes heat very well it is run round the core of the engine picking up as much heat as poss then in turn this heat is removed from the water by the Radiator.

What you have to understand if there was no means of regulating the heat the engine would effectivly over heat, So what you are doing when you turn the engine off is stopping the water getting to the radiator and thus causing the Water to heat up to the same temp as the engine/Turbo.

So what you will see if you watch say a Power FC is the Temp start to creep up from the 80\'s to well into the 100\'s before starting to fall. What we are saying if you Turn off as soon as you stop and let the Air con fans stay on, leave it for 10 seconds then start it again for 20-30 seconds (do that two or three times) it will never see over 100deg.

If you Run a Turbo car for 5 minutes on idle what you are doing is causing it too heat up, same Theory as the Turn off but now you have water going round the System but you don\'t have enough cold air being pushed through the rad to cool the water efficantly so the temp will start to rise, Plus you will also start to see somthing called Heat soke where the Core of the Engine will heat up alll the Inlet,IC etc.

Chris

[barmar]

This is all very interesting reading, out of interest how do you change the setting for the fan to come on with the pfc. Don\'t think I\'m the only one who\'s not sure about this.
Also does leaving the fans on while the car is idling create enough air flow through the rad to reduce the water temps at all? Or does the temp still rise with the engine still running?
I was thinking of getting an exhaust wrap around the manifold and front section of exhaust to help try and channel some of the heat out of the engine bay. Has anyone done this and did it help. I suppose it won\'t do any harm. Will it?

Barry

[Sy.]

sounds like your damed if you leave it on damed if you turn it off ! lol

So get the fans going on the aircon to cool it down while off and then start it again for 20 seconds and that should be ok .

[chris p]

but wont turning her on and off a few seconds apart cause flooding ??

[Grizzly]

not when its hot

[chris p]

ahhh thats nice to know  

And as barmar asked ..how exactly do yo change the fan cutting in temp ?? cos i sat for ages with mine a few days ago and couldnt find the menu:confused:

[chris p]

sounds like your damed if you leave it on damed if you turn it off ! lol

Maybe we should just leave her sat there and push her round wherever we want to go  :rollin