2020 mk 5 engine temp

[SEEJAY]

Hi All
I have a 2020 mk5 Supra and use it on a daily basis. I was looking at something under the bonnet today and thought the engine was still very hot. I had shut it down some five hrs. earlier. I checked the temp gauge and it is showing 4 bars out of 7 which is mid range and within tolerance .
Can some one with a mk5 just tell me what reading your getting from the gauge at running temp ,and is our engine still warm after 5 hrs

Kindest regards Seejay

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[zrk]

It'll come to 220°F nearly instantly. B58s are very good at heat management (at least from engine temp standpoint.. IATs.. not so much). 4 of 7 bars is right where it should be.

If you want the exact temp, you can get that from Ecutek or any other OBD reader.

 

[underdonk]

There's a link floating around somewhere that describes the B58's heat management system. It was an interview with a BMW engineer who was involved in it's design. They talk a good bit about the engine cover and the purpose it plays in retaining engine heat after you shut down the car. It does this for emissions purposes, so the car doesn't go through a full cold start cycle if you are just going to start it again a couple or three hours later. I'll see if I can find it. But, I will say, this is expected behavior and it was designed this way for emissions purposes. It sounds like the car was in a garage or you're in a warm climate?

 

[Davedaveee]

Mine holds heat for a while too, I'll start it up some 3 hours later and it's right up to temp. Should be part of the design purpose of the motor.

 

[Evolution]

@underdonk - I got you covered. Might not be the exact article but explains everything.

https://www.mishimoto.com/engineering/2020/05/toyota-radiator-stock-review-2020/

 

[Branflakes123]

There's a link floating around somewhere that describes the B58's heat management system. It was an interview with a BMW engineer who was involved in it's design. They talk a good bit about the engine cover and the purpose it plays in retaining engine heat after you shut down the car. It does this for emissions purposes, so the car doesn't go through a full cold start cycle if you are just going to start it again a couple or three hours later. I'll see if I can find it. But, I will say, this is expected behavior and it was designed this way for emissions purposes. It sounds like the car was in a garage or you're in a warm climate?

I was under the impression that this increased the longevity of seals and things as well. The argument was, minimizing full swing temperature changes reduces failure aka oil leaks

 

[SEEJAY]

Great thanx for the help Guys, i am in North Island New Zealand and its garaged.

 

[DarkZupra]

BMW has spent a lot of time working to SLOW the loss of heat after the engine shuts off. Why? Quickly heating and cooling is what causes plastic parts to fail (your valve cover, intake, water pump, etc). They found if they can keep some of the heat under the hood and slow the cool down time, these parts last much longer.

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