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      08-17-2019, 02:16 PM   #1
bcoffin23
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Exploding Coolant at Track

Hey Everyone,

Just ran my first track day in my 2006 330i. I was at WSIR and ambient tempts were about 92-94f. I was running in the high 1:30s in the advanced group. After about 5-6 laps each session I’d go into limp because of coolant tempts.

When I’d get back to my pit and open the hood, I’d always have about 1/2 gallon of coolant throughout the engine bay. Stemming from my overflow tank.

No issues now that I am driving normal, but always while on track.

Ideas?
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      08-17-2019, 03:37 PM   #2
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I didn't have issues, but I did hit the track in October last year. Have you refreshed your cooling system since you've owned it?
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      08-17-2019, 03:51 PM   #3
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Quote:
Originally Posted by Eagle1oh7 View Post
I didn't have issues, but I did hit the track in October last year. Have you refreshed your cooling system since you've owned it?
I have not.

What were the ambient tempts and your driving level? Any cooling mods?
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      08-17-2019, 03:53 PM   #4
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Just seems like you got her a bit toasty: hotlaps on a hot day. Definitely refresh the system if you haven't and take a look at a few cooling mods too.

- oil/coolant heat exchanger retrofit
- oil cooler retrofit
- full aluminum radiator

Really just anything to shed more heat. There's DIYs all over the forums.




While we're on the topic lol it's a good idea to replace the hose that goes into the head, there's an aluminum flange available on ebay.
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      08-17-2019, 04:07 PM   #5
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Quote:
Originally Posted by desertman123 View Post
Just seems like you got her a bit toasty: hotlaps on a hot day. Definitely refresh the system if you haven't and take a look at a few cooling mods too.

- oil/coolant heat exchanger retrofit
- oil cooler retrofit
- full aluminum radiator

Really just anything to shed more heat. There's DIYs all over the forums.




While we're on the topic lol it's a good idea to replace the hose that goes into the head, there's an aluminum flange available on ebay.
Thanks for the input! Which of those 3 mods have you seen give the biggest return?
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      08-17-2019, 04:14 PM   #6
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Quote:
Originally Posted by bcoffin23 View Post
Thanks for the input! Which of those 3 mods have you seen give the biggest return?
Haven't done them myself but I do know chris_flies did the heat exchanger and tracks his car so it works well. Good compromise if you don't want to figure out where to mount the oil cooler.

For both retrofits you can grab the parts used on ebay + new gaskets cheaper than the aluminum radiator. I imagine with the right bumper/fender liners you can do a full 335i oil cooler retrofit easily.

https://www.1addicts.com/forums/show...hp?t=1519384#2



I probably should do one of these being I'm in FL..
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Last edited by desertman123; 08-17-2019 at 05:16 PM..
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      08-17-2019, 05:32 PM   #7
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Quote:
Originally Posted by desertman123 View Post
Haven't done them myself but I do know chris_flies did the heat exchanger and tracks his car so it works well. Good compromise if you don't want to figure out where to mount the oil cooler.

For both retrofits you can grab the parts used on ebay + new gaskets cheaper than the aluminum radiator. I imagine with the right bumper/fender liners you can do a full 335i oil cooler retrofit easily.

https://www.1addicts.com/forums/show...hp?t=1519384#2



I probably should do one of these being I'm in FL..
Great! Thank you for the input
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      08-18-2019, 03:49 PM   #8
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Not sure the oil/water exchanger retrofit will help with high coolant temps....might actually make it worse. Go with the 335i oil cooler instead.
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      08-18-2019, 06:42 PM   #9
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Make sure your expansion tank bleeder screw is closed. Looks like a plastic philips screw.
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      08-18-2019, 06:48 PM   #10
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Quote:
Originally Posted by cwlo View Post
Not sure the oil/water exchanger retrofit will help with high coolant temps....might actually make it worse. Go with the 335i oil cooler instead.
Will lowering my oil temps also reduce my coolant tempts on the n52?
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      08-18-2019, 08:49 PM   #11
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Quote:
Originally Posted by bcoffin23 View Post
Will lowering my oil temps also reduce my coolant tempts on the n52?
It will, as long as you aren't using the coolant to cool the oil (like the oil-water heat exchanger retrofit).

If you're having coolant temp issues, I'd start with a radiator comb (I think Schwaben tools makes one, check ECS) and clean up the fins on your radiator. It's a cheap way to possibly rescue your old radiator. I'd also recommend getting some Redline Water Wetter. It works really well at improving the efficiency of the coolant, which helps lower temps. Just add about half a bottle to your reservoir, and you'll be set.

I've run VIR when it was 100 degrees out without a hint of limp mode. My car seems to be the only BMW in existence without cooling issues
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      08-19-2019, 11:40 AM   #12
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Quote:
Originally Posted by bcoffin23 View Post
Quote:
Originally Posted by Eagle1oh7 View Post
I didn't have issues, but I did hit the track in October last year. Have you refreshed your cooling system since you've owned it?
I have not.

What were the ambient tempts and your driving level? Any cooling mods?
All I did was do the heat exchanger retrofit. The temps that day were 80F and it was CCW13 at Button Willow. The only issue I had was the power steering fluid heating up and expanding out of the reservoir so I got the power steering cooler from CSF for Xmas. My plan was to upgrade my cooling system but this year has been hard financially.
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      08-22-2019, 12:01 PM   #13
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Quote:
Originally Posted by Eagle1oh7 View Post
All I did was do the heat exchanger retrofit. The temps that day were 80F and it was CCW13 at Button Willow. The only issue I had was the power steering fluid heating up and expanding out of the reservoir so I got the power steering cooler from CSF for Xmas. My plan was to upgrade my cooling system but this year has been hard financially.
Were you having coolant temp issues before you put in the heat exchanger?
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      08-22-2019, 12:02 PM   #14
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Quote:
Originally Posted by chris_flies View Post
It will, as long as you aren't using the coolant to cool the oil (like the oil-water heat exchanger retrofit).

If you're having coolant temp issues, I'd start with a radiator comb (I think Schwaben tools makes one, check ECS) and clean up the fins on your radiator. It's a cheap way to possibly rescue your old radiator. I'd also recommend getting some Redline Water Wetter. It works really well at improving the efficiency of the coolant, which helps lower temps. Just add about half a bottle to your reservoir, and you'll be set.

I've run VIR when it was 100 degrees out without a hint of limp mode. My car seems to be the only BMW in existence without cooling issues
Awesome! Likely am just going to buy the CSF radiator for the N52 and run 100% water with water wetter.
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      08-22-2019, 07:01 PM   #15
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Quote:
Originally Posted by bcoffin23 View Post
Quote:
Originally Posted by chris_flies View Post
It will, as long as you aren't using the coolant to cool the oil (like the oil-water heat exchanger retrofit).

If you're having coolant temp issues, I'd start with a radiator comb (I think Schwaben tools makes one, check ECS) and clean up the fins on your radiator. It's a cheap way to possibly rescue your old radiator. I'd also recommend getting some Redline Water Wetter. It works really well at improving the efficiency of the coolant, which helps lower temps. Just add about half a bottle to your reservoir, and you'll be set.

I've run VIR when it was 100 degrees out without a hint of limp mode. My car seems to be the only BMW in existence without cooling issues
Awesome! Likely am just going to buy the CSF radiator for the N52 and run 100% water with water wetter.
I would not advise pure water with the sensitivity of the Magnesium in the block to corrosion. Run BMW coolant; pure water is only useful in race cars that may spill fluids on track, and coolant is particularly slippery.
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      08-23-2019, 07:26 PM   #16
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Quote:
Originally Posted by bcoffin23 View Post
Quote:
Originally Posted by Eagle1oh7 View Post
All I did was do the heat exchanger retrofit. The temps that day were 80F and it was CCW13 at Button Willow. The only issue I had was the power steering fluid heating up and expanding out of the reservoir so I got the power steering cooler from CSF for Xmas. My plan was to upgrade my cooling system but this year has been hard financially.
Were you having coolant temp issues before you put in the heat exchanger?
Nope. I just thought it'd be worthwhile, and it was...kinda haha
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      08-24-2019, 12:18 PM   #17
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Quote:
Originally Posted by chris_flies View Post
I would not advise pure water with the sensitivity of the Magnesium in the block to corrosion. Run BMW coolant; pure water is only useful in race cars that may spill fluids on track, and coolant is particularly slippery.
No magnesium ever touches coolant in the N52 block.

But yeah, running no coolant on a street car is not a great idea.
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      08-27-2019, 07:26 AM   #18
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Quote:
Originally Posted by hassmaschine View Post
No magnesium ever touches coolant in the N52 block.

But yeah, running no coolant on a street car is not a great idea.
Why’s it not a good idea?
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