Oil cooler diverter valve

[AlexGTT]

Originally Posted by lawsy

I'm dropping the m3 at Simpsons for them to reinforce boot and add some more rear cage bits. Will be end of February. I'll give you a shout when I know exact dates.

It's a date. Probably drop in for cuppa with Ant Monday. Will tell him to get his customer entertainment expenses out ready.

[stevenEK9]

Digging up this thread again...........

was at DN9 at the ring last year, near on every E46 M3 (including mine) had elevated coolant temps. running with the heaters full chat just about kept them stable but of course not ideal as you end up a sweaty mess when it's 30 deg outside

at the time my e46 was standard engine wise but with brand new genuine radiator & thermostat

anyone fitted a larger capacity radiator such as this?

http://www.turnermotorsport.com/p-18...r-upgrade.aspx

in my old EK9 civic i replaced the standard half size radiator with a koyo one (4 times as big pretty much) and even with mega oil temps the coolant would never ever budge above 80 degrees - very effective

cheers

[Mike R]

Originally Posted by stevenEK9

Digging up this thread again...........

was at DN9 at the ring last year, near on every E46 M3 (including mine) had elevated coolant temps. running with the heaters full chat just about kept them stable but of course not ideal as you end up a sweaty mess when it's 30 deg outside

at the time my e46 was standard engine wise but with brand new genuine radiator & thermostat

anyone fitted a larger capacity radiator such as this?

http://www.turnermotorsport.com/p-18...r-upgrade.aspx

in my old EK9 civic i replaced the standard half size radiator with a koyo one (4 times as big pretty much) and even with mega oil temps the coolant would never ever budge above 80 degrees - very effective

cheers

I was at the same event and I had my aircon running all the time due to the high ambients and never had any water temp issues (never went beyond half way), but my oil temp did regularly go to the ¾ mark (and on a hot lap, a fraction beyond). However, I only ever did one lap at a time (followed by a strict cool down regime of doing a "lap" around the the village (by turning right out of the circuit and then keep turning right until I returned to the main entrance - a good couple of miles)).

I also had my front number plate removed for maximum air flow.

My car is completely standard engine wise (just a Supersprint exhaust).

Based on this, I got the Bimmerworld oil cooler:
http://store.bimmerworld.com/bimmerw...ler-p1517.aspx

However, I've yet to experience conditions similar to DN9 since fitting it.

[shane@mbtech]

Again, my car never overheated at the ring in circa 29-30* temps.
Again my car has no aircon. Its got to be a air flow issue with the fans blocking flow, the aircon rad blocking flow.

I'm tempted to remove my A/C. window open is enough

Originally Posted by stevenEK9

Digging up this thread again...........

was at DN9 at the ring last year, near on every E46 M3 (including mine) had elevated coolant temps. running with the heaters full chat just about kept them stable but of course not ideal as you end up a sweaty mess when it's 30 deg outside

at the time my e46 was standard engine wise but with brand new genuine radiator & thermostat

anyone fitted a larger capacity radiator such as this?

http://www.turnermotorsport.com/p-18...r-upgrade.aspx

in my old EK9 civic i replaced the standard half size radiator with a koyo one (4 times as big pretty much) and even with mega oil temps the coolant would never ever budge above 80 degrees - very effective

cheers

[stevenEK9]

I remember the car, Laurence did a bit of laptop trickery for you at some point?!

see i was the opposite, oil temps never exceeded 3/4, water temps was the issue

i would like to retain the AC, so think a more efficient radiator would work better for me

i'm now running a CSL rep bumper so can run it as below for track days without the plate to minimise any airflow disturbance up front also

Originally Posted by Mike R

I was at the same event and I had my aircon running all the time due to the high ambients and never had any water temp issues (never went beyond half way), but my oil temp did regularly go to the ¾ mark (and a little beyond). However, I only ever did one lap at a time (followed by a strict cool down regime of doing a "lap" around the the village (by turning right out of the circuit and then keep turning right until I returned to the main entrance - a good couple of miles)).

I also had my front number plate removed for maximum air flow.

My car is completely standard engine wise (just a Supersprint exhaust).

Based on this, I got the Bimmerworld oil cooler:
http://store.bimmerworld.com/bimmerw...ler-p1517.aspx

However, I've yet to experience conditions similar to DN9 since fitting it.

[Mike R]

Originally Posted by stevenEK9

I remember the car, Laurence did a bit of laptop trickery for you at some point?!

see i was the opposite, oil temps never exceeded 3/4, water temps was the issue

i would like to retain the AC, so think a more efficient radiator would work better for me

i'm now running a CSL rep bumper so can run it as below for track days without the plate to minimise any airflow disturbance up front also

Hi Steve,
He did indeed - one of the wheel-speed sensors decided it had forgotten how to communicate with the ECU, so had to be re-coded .

Mmmm, bizarre how the "getting hot" symptoms seem to vary from car to car. Either suffering from high oil temps OR high water temps.

[Ali M]

My car was behaving pretty much just as Steven's on DN9, oil was fine but water was nudging up to the red. I kept an eye on it and turned on the heaters to full whenever it started to climb.

I think we saw up to 33 deg ambient although keeping the rear pop windows open made it just about bearable

I have a slightly smaller 3/4 plate which allows full airflow so no issues there.

My car was on original rad/waterpump/thermostat (to best of my knowledge) but was only around 35K miles, so would hope that all is well there (although not ruling out).

Lawsy - I read your AC comment earlier in thread and it matches comments from guys in the states with E46M track/race cars - biggest single difference they say was removing AC and actually getting some decent flow to the rad.

I think the 'Gorilla' (possibly someone else) mentioned along the lines of the 46M/CSL rad nearing its capacity and just seems when used hard it starts to boil.

On DN9 I was doing multiple laps, usually in batches of 3.

With DN10 being in July and wanting to have 2 days hard lapping/multiple laps at a time, I need to get something working before this.

Worth mentioning that DN days have the main straight so cars are at WOT for 20+ secs

Tempted to look into removing AC for the trip but not really keen if it is a pain to put back in again as its a road car at the end of the day.

[rstoughy]

No issues with my temps except when running close behind an r8. Only then did they rise to the top of the scale but once past and back in clean air all was good

[Ali M]

This was an interesting read - http://www.m3forum.net/m3forum/showthread.php?t=445368

From what I remember (not read in a while) a few guys were going to try water wetter & distilled water or similar in a bid to lower temps without removing AC.

Interesting after reading Gorilla's point on coolant mix

[_Nathan_]

Originally Posted by Mike R

Hi Steve,
He did indeed - one of the wheel-speed sensors decided it had forgotten how to communicate with the ECU, so had to be re-coded .

???

Heard it all now, wheel speed sensors forgotten how to communicate?