Reply With Quoteregarding the temp gauge: are u sure u have the right coolant mix?Originally Posted by grave77
Major Contributor
bigger radiator
I know that this sounds strange somehow but when its 115F / 45C like it was today u will always think about having a better cooling system for the engine. what I wanted to ask is that can I have a bigger radiator installed on my car? does it work or not? if this is all not the case then whats the best thing to do to cool the engine for better performance? P.S. the heat meter is above the middle point most of the time at such weather.
Big, Big Time Poster
regarding the temp gauge: are u sure u have the right coolant mix?
4 Grand Master
I would check this first... you should have more water than coolant... Also flush out your radiator fins... from engine compartment outward to get rid of bugs, sand, etc out of the radiator... air or water.
Big, Big Time Poster
another thought maybe... take the rad out and take it to a radiator place and get them to flush it out for u. get any crud out of the inside.
Super Moderator
Grave,
I can tell you from my car. That is original Japan version. We also have in summer +/- 40 degee Celsius. The engine oil of my 750 has 1 Liter more engine oil than the spec for Europe for example. There are also differen thermostats which open at different temperaures. For example the ones in Sweden have a different opening than the one for the tropical version.
The aircons are stronger to cope with subtropical or tropical climates.
In case of Dubai you need for sure the tropical specification.
Is that car from Europe exported?
Then maybe you check on the spare parts catalog for thermostats which open earlier and also maybe for a larger radiator (if that exists for the E34).
But as you say the temp indicator is in the usual position, there is actually nothing wrong.
What you maybe could easily do: install an additional oil cooler. That does not take so much space. In case of my 750 the oil cooler is integrated into the coolant system.
5-10 Grand Master
i have a 540 radiator in my 535, it's thicker and wider, it fits right in the car with the correct lower plastic mounts, if you have a auto tranny you need a external cooler (i am using a cooler from a e36 325 that bolts up to the radiator) which gets more heat out of the coolent, i had to wire the 535 fan shroud on as the 540 rad is almost 2" wider and the 540 shroud won't work with the 535 fan position, id show a picture but my web space is down at the moment. i've only gotten it warm once with it, sitting in line at the bank with the ac on for about a half hour, ambiant temp was well over 100* the outside temp on the obc was pegged at 125*, it got to around 3/4 so when i finally got moving i kept the rpm up and drove around a little to cool it off before shutting it down, the fan clutch was locked all the way past 3k rpm
all america wants is cold beer warm cat and a place to take a poop with a door on it
Big, Big Time Poster
What about that 'water wetter' stuff? I've never tried it, but I've heard good things from some people who have used it in non-BMW cars. Coolant Flush + distilled water + water wetter
5-10 Grand Master
it helped in the bosses old 88 m3, you still need a coolent mix for corrosion protection and higher boiling point, watter wetter does something to the surface tension of the water to help it absorb heat better. i run a leaner mix of af/water around 70/30 water/af as water cools better then af and it doesn't get below 0* here
all america wants is cold beer warm cat and a place to take a poop with a door on it
5-10 Grand Master
i have a factory oil cooler from a e32 735 that bolts to the bottom of the radiator that i am going to install on my car when i get time
all america wants is cold beer warm cat and a place to take a poop with a door on it
Big, Big Time Poster
Yeah, you can't run just straight water or you'd rust out everythingAlso, what about an electric fan?
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