so its been bugging me all day but after some research it turns out the coolant can freeze. well… not freeze per say but when improperly mixed it does gel up and doesn’t flow properly which would explain the air pocket like affects we were seeing last night, not enough water to freeze and too much coolant hence the gelling vs freezing. i cant see the pump failing again, it seems like that would explain why both pete and i saw what we did last night. the other common variable was TEMPERATURE…
didn’t Pete’s car do this a couple of weeks ago?
What was the temp last night, and what was it a couple of weeks ago?
The temps last night were 13-14F. I would think that stuff would happen when well into the negative temps no?
Yep - few weeks ago temps were slightly above 32F.
We didn’t check reservoir then. Just noted the odd behavior over 120 mph and something feeling off.
on its own sure, but keep in mind wind chill factor of that cold air hitting the radiator and heat exchanger, the coolant res was freezing to the touch last night, no way for it to thaw or come up to temp even when running the motor hard. i think i need to flush the entire system out and refill with a proper 50/50 mix
The Res was freezing??? Even with the motor running?
congealing more than freezing but yes for coolant id consider that freezing. before i realized it gelled up i poured a bit of water in only to find out it wasn’t mixing. the fluid in the res was COMPLETELY still even with the pump engaged. it took me using a dowel like object to get down past the res and into the tube where the gelled coolant was and having to stir it up. after an hour long drive from long island back to hoboken(and a bunch of back to back pulls…) it had still NOT mixed and the res was still freezing to the touch and completely still. so somewhere within that loop there is more gelled up coolant that the pump just cant do its job.
50:50 pentosin and water gives you a -36F freezing point. Wind chill isn’t a factor, since that correlates to the human skin losing water through evaporation. If your CPS rad was, say, sprayed with washer fluid it would experience a wind chill of sorts.
Richi, have you used any other type of coolant in there? The only stories of gelled up mucky coolant I hear is when two different coolants are mixed…or not flushed well enough before switching…stuff precipitates out and makes a gunky mess.
i only use the audi/vw g12
Pete sort each section by 60-130 time so there’s some flow to it.
I. E. The Apr cars sorted by time, then the giac cars sorted by time. That way all the tunes are separate but sorted.
Also you’re missing to tonyrs4’s 14.02 run
Will def do that right now and will add Tony’s time as well!
Yeah, worth a flush just in case…lots of water…
Come summertime, all you CPS guys should go right down to 10% pentosin only…if you want the maximum cooling.
APR Stage 2 Testpipe runs coming soon 
… You switching over to APR???
may I interest someone in a strawberry slushy?
http://i911.photobucket.com/albums/ac317/richib86/50CA1F0E-05D6-4512-9C2B-7FDCB5BCC1A4-162-0000000422D8E0AA.jpg
Give you a dolla if you drink it
That’s just too weird. Mix some pentofrost ++ and hot water, 50/50, and pour some in there. Use a turkey baster to suck up the excess. If it doesn’t melt, you have issues with some contaminant gelling up the coolant.
Is it the ++?
Wayot
Auditude3.0T what was that crazy wheel tire setup your dad’s rs4 had. Something like 10" oz wheels? Someone on Rs246 was asking
20x10 ET12 with 255/30/20 max negative camber in rear and front 034 controls arms machined down 2" and -3.2 degrees of negative camber up front with rolled fenders lol