F8X S55 owners BEWARE!!!!

[shay2nak]

Mine is still at max level 1372 miles/2018.

[M-Pilot]

I've been monitoring my M2C for almost two months now. After 3700miles and a track day, it's still at the same level (very close to max).

[bravehart38]

Wouldn’t an internal coolant leak show up in a Blackstone oil report? Just looking for a definitive proof of an internal coolant leak.

[damageprone]

Originally Posted by bravehart38

Wouldn’t an internal coolant leak show up in a Blackstone oil report? Just looking for a definitive proof of an internal coolant leak.

I would assume so.

[G4BR13L]

Originally Posted by damageprone

I would assume so.

Yes if the IC coolant leaks and you would also see oil in the engine coolant if both coolant reservoirs are below level after topping it up, you would see white smoke coming out of the exhaust when the engine is at operating temperature or other obvious signs.

Could be a leaking IC on one hand and a leaking engine coolant reservoir on the other hand but what are the odds of that. Could be the expansion tank as well, or even the pumps. Maybe even the radiator that got punctured. But we can speculate all we want.

Top up both coolant reservoirs with BMW Coolant (limit the use of water which is bad for the pumps) and put the car indoor for the night and put newspapers under the car to see if there is a leak. Another way to check is to check if the coolant tubes are hard (pressurized).

[qmp]

Originally Posted by avex8

Csf got better customer service, you can reach the owner on Instagram, email or phone. EOS took few days to get back to me and couldn't talk anyone over the phone. Most car I see at the car meet uses CSF / VF they are the same design.

Until recent EOS only offered a full billet ( core and end tanks) unit at the high end of the price spectrum. They've added a cast unit design ( billet core / cast end tanks) similar to what's available on the market. Currently EOS units have the largest core. Also the internals are polished for better airflow. EOS parts are made in the USA. My experience with customer service has be great and response on par with a company of their size and footprint.

[KevM2]

Originally Posted by qmp

Until recent EOS only offered a full billet ( core and end tanks) unit at the high end of the price spectrum. They've added a cast unit design ( billet core / cast end tanks) similar to what's available on the market. Currently EOS units have the largest core. Also the internals are polished for better airflow. EOS parts are made in the USA. My experience with customer service has be great and response on par with a company of their size and footprint.

So for sure EOS has better internals than CSF? I thought I'd go with CSF since that's been around the longest so has a longer track record for any potential issues... have you used the EOS or know people who have and if so, are they satisfied?

[hsosa86]

A forum member asked earlier in the thread, if this happens to aftermarket intercoolers.

The answer is yes, I had my aftermarket intercooler blow on my M4 on track. I saw high intake temps, so I pitted. Once I got to my pit stall, the check engine light turned on. I checked the code and it was "charge air coolant pump condition dry". I opened the hood and there was dried up coolant everywhere. "Not regular coolant, since I run water with some water wetter on track". The hood, engine cover, intake manifold all covered. I opened the reservoir, and it was completely dry. That's when someone approached me and asked if I had noticed my car was smoking on track. I told him I had not, but that there was something obviously wrong with my car. It was light smoke so I couldn't see it. So I had my car taken to Active Autowerke in Miami, which is 170 miles from Sebring. So it ended up having a leaky core. Which allowed coolant into the engine and boost into the hole which blew out both rubber seals on either side of intercooler. When both side seals went, that when the coolant exploded everywhere.

I messaged the company when the problem happened on track, I told them I was taking it to the shop. I messaged them again with the findings. They then called me and they overnighted me a new intercooler.

When the intercooler blew up, I only had it for 5-6 months. This wasn't the only issue I had with the intercooler. On my first track day with the intercooler at palm beach international, I had coolant start bubbling from the top of the rear seal of intercooler. So I message the company and tell them what's happening with my intercooler. They told me, that the intercooler I bought since its hydro dipped in carbon fiber. Is the only version of the intercooler that they don't complete the assembly themselves. The people at the hydro dip place, finish assembling it and that it's a know issue that they don't tighten the screw down enough. They told me to tighten the rear seal myself. So I had to take a torx bit and do it myself.

Someone asked why the intercooler ends are not welded. I believe they should be welded, it would of eliminate my first problem with the intercooler when I bought it. On the second intercooler, Active sealed up both ends really good. No problems since.

I did 34 track days last year. The car was making 550whp at the time the first intercooler blew. I also had methanol Injection at the time. Not sure if the corrosiveness of methanol on the intercooler played any part. The car now make 685whp with pure turbos and no problems with second intercooler as of yet.

[KevM2]

Originally Posted by hsosa86

A forum member asked earlier in the thread, if this happens to aftermarket intercoolers.

The answer is yes, I had my aftermarket intercooler blow on my M4 on track. I saw high intake temps, so I pitted. Once I got to my pit stall, the check engine light turned on. I checked the code and it was "charge air coolant pump condition dry". I opened the hood and there was dried up coolant everywhere. "Not regular coolant, since I run water with some water wetter on track". The hood, engine cover, intake manifold all covered. I opened the reservoir, and it was completely dry. That's when someone approached me and asked if I had noticed my car was smoking on track. I told him I had not, but that there was something obviously wrong with my car. It was light smoke so I couldn't see it. So I had my car taken to Active Autowerke in Miami, which is 170 miles from Sebring. So it ended up having a leaky core. Which allowed coolant into the engine and boost into the hole which blew out both rubber seals on either side of intercooler. When both side seals went, that when the coolant exploded everywhere.

I messaged the company when the problem happened on track, I told them I was taking it to the shop. I messaged them again with the findings. They then called me and they overnighted me a new intercooler.

When the intercooler blew up, I only had it for 5-6 months. This wasn't the only issue I had with the intercooler. On my first track day with the intercooler at palm beach international, I had coolant start bubbling from the top of the rear seal of intercooler. So I message the company and tell them what's happening with my intercooler. They told me, that the intercooler I bought since its hydro dipped in carbon fiber. Is the only version of the intercooler that they don't complete the assembly themselves. The people at the hydro dip place, finish assembling it and that it's a know issue that they don't tighten the screw down enough. They told me to tighten the rear seal myself. So I had to take a torx bit and do it myself.

Someone asked why the intercooler ends are not welded. I believe they should be welded, it would of eliminate my first problem with the intercooler when I bought it. On the second intercooler, Active sealed up both ends really good. No problems since.

I did 34 track days last year. The car was making 550whp at the time the first intercooler blew. I also had methanol Injection at the time. Not sure if the corrosiveness of methanol on the intercooler played any part. The car now make 685whp with pure turbos and no problems with second intercooler as of yet.

Thanks for that info! That solves my dilemma of which to buy... EOS it is since theirs is welded

[shay2nak]

Originally Posted by hsosa86

A forum member asked earlier in the thread, if this happens to aftermarket intercoolers.

The answer is yes, I had my aftermarket intercooler blow on my M4 on track. I saw high intake temps, so I pitted. Once I got to my pit stall, the check engine light turned on. I checked the code and it was "charge air coolant pump condition dry".ing it and that it's a know issue that they don't tighten the screw down enough. They told me to tighten the rear seal myself. So I had to take a torx bit and do it myself.

Which intercooler is this?

[KevM2]

Originally Posted by shay2nak

Which intercooler is this?

The Top Mounted charge-cooler

[parabmw]

Is the car driveable at normal speed?

[hsosa86]

Originally Posted by shay2nak

Which intercooler is this?

You should know which intercooler it is, with the description I wrote out. If your not familiar with the different aftermarket intercooler. Mine was a CSF intercooler. Like I said, no problem so far with second intercooler and customer service was good and fast. They suggested raw aluminum version, since I track my car so much.
So I went with raw aluminum version, which is kind of an eyesore since I have so much carbon fiber under the hood.

[shay2nak]

Originally Posted by KevM2

The Top Mounted charge-cooler

lol Right. I meant the brand.

Originally Posted by hsosa86

You should know which intercooler it is, with the description I wrote out. If your not familiar with the different aftermarket intercooler. Mine was a CSF intercooler. Like I said, no problem so far with second intercooler and customer service was good and fast. They suggested raw aluminum version, since I track my car so much.
So I went with raw aluminum version, which is kind of an eyesore since I have so much carbon fiber under the hood.

Thanks. I didn't want to guess since there is more than one out there.

[FAKE__NEWS]

Originally Posted by damageprone

I would assume so.

Mine did not show up on either of the two analyses I had done.

[damageprone]

Originally Posted by FAKE__NEWS

Mine did not show up on either of the two analyses I had done.

I guess that’s reassuring.

[G4BR13L]

Originally Posted by FAKE__NEWS

Mine did not show up on either of the two analyses I had done.

If it is your IC that leaks coolant it will not show in the oil analysis. It will leak coolant through the intake directly into your cilinders whilst the oil is a seperate circuit that is supposed to stay below the piston rings. It will however be visible through white smoke from the exhaust when the car is at operating temperature.

It might be that the engine coolant is leaking but does not necessarily mean that it will be visible in the oil analysis as it depends where the leak is.

[FAKE__NEWS]

Originally Posted by G4BR13L

If it is your IC that leaks coolant it will not show in the oil analysis. It will leak coolant through the intake directly into your cilinders whilst the oil is a seperate circuit that is supposed to stay below the piston rings. It will however be visible through white smoke from the exhaust when the car is at operating temperature.

It might be that the engine coolant is leaking but does not necessarily mean that it will be visible in the oil analysis as it depends where the leak is.

Thanks, I know. I've already replaced mine.

[petrolhead.]

Don't you need to bleed the cooling system after opening the reservoir cap? Or is that only true for engine cooling, not the IC cooling?

[G4BR13L]

Originally Posted by petrolhead.

Don't you need to bleed the cooling system after opening the reservoir cap? Or is that only true for engine cooling, not the IC cooling?

No need to bleed when opening the cap or adding a bit of coolant. If you completely drain and fill yes and if you notice that the temp is too high then also yes or when there are bubbles in the coolant or it becomes foamy, ...

If you want to know how to bleed, here are the instructions:
https://www.newtis.info/tisv2/a/en/f...eck/1VnXqfU9E9

[petrolhead.]

Thanks!

[DisonCC]

thanks for sharing