Tire temp question...

ambletx · 03-27-2022, 11:00 PM

So last week I was driving along and got on the car a little bit to get on the express way. The car shook a little, nothing serious but I wanted to check the tire pressure to see if something was off. The only thing I did see which seemed odd is that my left front tire was reporting significantly higher temps than the others. Prior to this little burst of speed it was pretty much normal driving for the previous 20 miles or so. Do any of you guys have similar behaviors with your tire temps?

ash4390 · 03-28-2022, 12:13 AM

I see the same thing on my 2019 Base (PS4S). Front left runs noticeably hotter than the others, maybe it's my fat ass weighing down the car lol.

SenorFunkyPants · 03-28-2022, 04:47 AM

IIRC its a radiator in the front left wheel well heating up the tyre.
My display is slightly different, its has extra, the recommended tyre pressure for the actual temperature of the tyre.

Maniax · 03-28-2022, 08:44 AM

The front left tire is heated by the auxiliary radiator, which runs hotter than the front right tire which is heated by the charge air cooler.

hoffmeister · 03-28-2022, 11:33 AM

With all the other tires that cool i'd argue it wasnt running long or hard enough for the radiator to heat the tire. Possible that theres an alignment issue on that wheel?

adeuel · 03-28-2022, 11:37 AM

Oil cooler there.

On track, I would need to start the driver front tire about 4 pounds less than the other three. lol.

ambletx · 03-29-2022, 10:49 PM

Quote:

Originally Posted by hoffmeister

With all the other tires that cool i'd argue it wasnt running long or hard enough for the radiator to heat the tire. Possible that theres an alignment issue on that wheel?

I don't think its that as the car had an alignment at BMW less than 1000 miles ago.

phoenixbmwlife · 04-03-2022, 07:02 AM

Perhaps the sensor is bad. This shouldn't be normal at all.

wesleyan92 · 04-03-2022, 07:37 AM

Quote:

Originally Posted by SenorFunkyPants

IIRC its a radiator in the front left wheel well heating up the tyre.
My display is slightly different, its has extra, the recommended tyre pressure for the actual temperature of the tyre.

Spot on. However, the temp difference looks significant. On my car, front left usually runs 3-5 degrees higher.

shawnhayes · 04-11-2022, 05:18 PM

Quote:

Originally Posted by adeuel

Oil cooler there.

On track, I would need to start the driver front tire about 4 pounds less than the other three. lol.

Minimum.

Hang on.... Pic on phone.

Shawn

shawnhayes · 04-11-2022, 05:22 PM

Quote:

Originally Posted by shawnhayes

Quote:

Originally Posted by adeuel

Oil cooler there.

On track, I would need to start the driver front tire about 4 pounds less than the other three. lol.

Minimum.

Hang on.... Pic on phone.

Shawn

There go:

hoffmeister · 04-11-2022, 05:34 PM

Adding one to the mix here. This one was at Lime Rock which is all right turns except one left hander.

shawnhayes · 04-11-2022, 05:38 PM

Quote:

Originally Posted by hoffmeister

Adding one to the mix here. This one was at Lime Rock which is all right turns except one left hander.

To all the assholes who say "it's not a track car"

Shawn

shawnhayes · 04-11-2022, 05:39 PM

Quote:

Originally Posted by hoffmeister

Adding one to the mix here. This one was at Lime Rock which is all right turns except one left hander.

However, WHAT TIRES are you running?

Over 40psi gets a little wiggly on all but super stickies (and THOSE are supposed to be run in the mid 30's).

Shawn

hoffmeister · 04-11-2022, 08:58 PM

Quote:

Originally Posted by shawnhayes

Quote:

Originally Posted by hoffmeister

Adding one to the mix here. This one was at Lime Rock which is all right turns except one left hander.

However, WHAT TIRES are you running?

Over 40psi gets a little wiggly on all but super stickies (and THOSE are supposed to be run in the mid 30's).

Shawn

Yeah. That was way too much psi on that run. Needed to start in very low 30's. Those were the stock pirellis. It was a little squirrely at the end of that run for sure.

shawnhayes · 04-11-2022, 09:09 PM

Quote:

Originally Posted by hoffmeister

Yeah. That was way too much psi on that run. Needed to start in very low 30's. Those were the stock pirellis. It was a little squirrely at the end of that run for sure.

I'm sure. 39 all around at the end of a run on DOT compounds is probably the max I'd run at. The michelins and pirelli's both act funky at that pressure when hot.

Shawn

shawnhayes · 04-11-2022, 09:12 PM

To the OP...

Normal my friend. Oil cooler is up there. LOTS o'heat coming from that. It's unfortunate for NA track junkies like me this is on the left front. Most NA tracks are run clockwise. Many euro tracks are run counter clockwise, and the oil cooler is heating the inner tire rather than the outer tire. Which is the way you would want it.

Shawn

SenorFunkyPants · 04-12-2022, 01:39 AM

Quote:

Originally Posted by shawnhayes

Most NA tracks are run clockwise. Many euro tracks are run counter clockwise,

Surely most Euro tracks are run clockwise.
The majority of F1 tracks certainly are.

pbonsalb · 04-12-2022, 08:53 AM

Does it depend which side of the road the country drives on?

shawnhayes · 04-12-2022, 12:25 PM

Quote:

Originally Posted by SenorFunkyPants

Surely most Euro tracks are run clockwise.
The majority of F1 tracks certainly are.

Baku
Singapore
COTA
Sau Paulo
Abu Dhabi

All anti-clockwise. I know that most USA road courses are run clockwise and there are some run anticlockwise in Europe. I hadn't counted them all.

It would have been best for the clockwise tracks for the oil cooler to be venting on the right tire, but its heating already the overloaded tire. Maybe it warms it up quicker in cold weather keeping the car on the track?

I dunno. But it helped me cord my last set of hoosiers by overheating the left front.

Shawn

SenorFunkyPants · 04-12-2022, 04:15 PM

Quote:

Originally Posted by shawnhayes

Baku
Singapore
COTA
Sau Paulo
Abu Dhabi

All anti-clockwise.

The other 20 odd F1 tracks are clockwise IIRC.
Not that it really matters for the 99.99% of M5 owners who won't track their car.

hoffmeister · 04-12-2022, 06:22 PM

Quote:

Originally Posted by SenorFunkyPants

Quote:

Originally Posted by shawnhayes

Baku
Singapore
COTA
Sau Paulo
Abu Dhabi

All anti-clockwise.

The other 20 odd F1 tracks are clockwise IIRC.
Not that it really matters for the 99.99% of M5 owners who won't track their car.

…which is a shame but also correct. If you bought this car you owe it to yourself to go to a track event. Get in a novice group. Ride with an instructor in the passenger seat teaching you how to push the car. Its better than drugs.

03-27-2022, 11:00 PM	#1
ambletx First Lieutenant 516 Rep 382 Posts Drives: 2021 M5 Comp Join Date: Oct 2017 Location: Austin, TX iTrader: (0)	Tire temp question... So last week I was driving along and got on the car a little bit to get on the express way. The car shook a little, nothing serious but I wanted to check the tire pressure to see if something was off. The only thing I did see which seemed odd is that my left front tire was reporting significantly higher temps than the others. Prior to this little burst of speed it was pretty much normal driving for the previous 20 miles or so. Do any of you guys have similar behaviors with your tire temps?
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03-28-2022, 12:13 AM	#2
ash4390 Second Lieutenant 588 Rep 287 Posts Drives: AMG GTC, X5 40i Join Date: Nov 2015 Location: Vancouver iTrader: (0)	I see the same thing on my 2019 Base (PS4S). Front left runs noticeably hotter than the others, maybe it's my fat ass weighing down the car lol. __________________ Upcoming: GT3 some day... Current: AMG GTC, 2019 X5 40i Previous: Way too many M cars, a few P cars, and one VW Lambo spyder.
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03-28-2022, 04:47 AM	#3
SenorFunkyPants Brigadier General 2511 Rep 4,381 Posts Drives: 2019 M5 Join Date: Mar 2009 Location: UK iTrader: (0)	IIRC its a radiator in the front left wheel well heating up the tyre. My display is slightly different, its has extra, the recommended tyre pressure for the actual temperature of the tyre.
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03-28-2022, 08:44 AM	#4
Maniax Enlisted Member 26 Rep 40 Posts Drives: M2 Join Date: Jan 2016 Location: Singapore iTrader: (0)	The front left tire is heated by the auxiliary radiator, which runs hotter than the front right tire which is heated by the charge air cooler.
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03-28-2022, 11:33 AM	#5
hoffmeister Second Lieutenant 264 Rep 272 Posts Drives: 2018 M5, 2016 M4, 2015 X5 5.0 Join Date: Feb 2015 Location: Ny iTrader: (0)	With all the other tires that cool i'd argue it wasnt running long or hard enough for the radiator to heat the tire. Possible that theres an alignment issue on that wheel?
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03-28-2022, 11:37 AM	#6
adeuel Lieutenant 317 Rep 516 Posts Drives: 2021 Oxford Green M5C Join Date: Mar 2016 Location: Rochester NY iTrader: (0)	Oil cooler there. On track, I would need to start the driver front tire about 4 pounds less than the other three. lol. __________________ Current: 2021 Oxford Green over Caramel M5C 2022 Ford Mustang Mach 1 : 2021 Yukon Denali : 2011 Ti Silver 128i 6MT, Koral Gone: 2021 Carbon Black X7 M50i : 2018 SG M5 2016 Med Blue 650ix GC : 2008 BSM 535i 6MT 1999 Jet Black 528i
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04-03-2022, 07:02 AM	#8
phoenixbmwlife Brigadier General 1913 Rep 4,128 Posts Drives: M235i & G30 540i Join Date: Mar 2007 Location: Boynton Beach iTrader: (0) Garage List 2014 BMW/M235i [0.00]	Perhaps the sensor is bad. This shouldn't be normal at all. __________________ Lack of money is not the problem. It is merely a symptom of what's going on inside of you! - T Harv Eker Follow me on Insta https://www.instagram.com/bmwm_life_/ https://www.instagram.com/autogiftua/ https://www.instagram.com/phoenixbmwlife/
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04-11-2022, 05:34 PM	#12
hoffmeister Second Lieutenant 264 Rep 272 Posts Drives: 2018 M5, 2016 M4, 2015 X5 5.0 Join Date: Feb 2015 Location: Ny iTrader: (0)	Adding one to the mix here. This one was at Lime Rock which is all right turns except one left hander. Attached Images
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04-11-2022, 09:12 PM	#17
shawnhayes Major 1830 Rep 1,315 Posts Drives: 22M5 CS,23X5E,24M3 CS,24 i4 Join Date: Aug 2015 Location: Virginia iTrader: (0)	To the OP... Normal my friend. Oil cooler is up there. LOTS o'heat coming from that. It's unfortunate for NA track junkies like me this is on the left front. Most NA tracks are run clockwise. Many euro tracks are run counter clockwise, and the oil cooler is heating the inner tire rather than the outer tire. Which is the way you would want it. Shawn
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04-12-2022, 08:53 AM	#19
pbonsalb Lieutenant General 5228 Rep 10,611 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	Does it depend which side of the road the country drives on?
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