Engine heat?

[dbx]

Preface: I have a 2.0T base model, and my assignment/gig has me keeping my car under a carport.

I'm less than 2.5 miles from my work, and I always let my car warm up (3-5mins) before leaving from work. Normally, I "baby" it on this short run home (no romping on it).

What's weird to me, is that I can come outside 3 hours later.....yes, 3hrs later!!!!.....and feel heat coming from the hood surface, especially, closer to where heat escapes (the " hood lines") and even the adjacent/top of front qtr panels.

The "cool-down" time seems crazy to me. Are today's car engines that "enclosed", as to have such a long cool down period? It almost seems that the attempt to keep the engine bay clean (via underpinning, etc...), has resulted in an abnormal amount of heat to be trapped & dissipate from the engine bay. I'm not just talking "warmth", I'm talking...3hrs later, the heat feels akin to having just pulled into my driveway within a 30 minute period.

What's up with that?

 

[guybo]

All cars heat soak like that. It's a large mass of metal that gets hot. The turbo gets really hot and it does not help at all.

You shouldn't let the car warm up for 3-5 mins, that is bad for the engine. Get in, start it up and go and get all the oil pumping and fluids moving. Modern cars are specifically designed to not be warmed up like older cars had to be.

When you stop the car however- if you have been in boost and the turbo has been working hard, you should never shut the car down right away. Oil is running through the turbo cooling it down. Let it sit and idle for a few minutes before you shut the car off.

 

[LandoAWD]

You shouldn't let the car warm up for 3-5 mins, that is bad for the engine. Get in, start it up and go and get all the oil pumping and fluids moving. Modern cars are specifically designed to not be warmed up like older cars had to be.

No. This is a turbocharged car. Let it get to operating temp if you plan to leave vacuum.

When you stop the car however- if you have been in boost and the turbo has been working hard, you should never shut the car down right away. Oil is running through the turbo cooling it down. Let it sit and idle for a few minutes before you shut the car off.

Here's where the "modern car" from your other quote comes into play. The turbo, like many cars over the last 25 years, is oil and water cooled. The sit and wait method becomes excessive, and coking is not as prevalent as with oil-only. Just don't do a bunch of back to back WOT pulls and immediately put it away wet. Simply driving like a normal human for the last mile or so will be sufficient.

 

[kn5owa]

No. This is a turbocharged car. Let it get to operating temp if you plan to leave vacuum.

Here's where the "modern car" from your other quote comes into play. The turbo, like many cars over the last 25 years, is oil and water cooled. The sit and wait method becomes excessive, and coking is not as prevalent as with oil-only. Just don't do a bunch of back to back WOT pulls and immediately put it away wet. Simply driving like a normal human for the last mile or so will be sufficient.

Why I've always avoided turbo cars like the plague.

 

[LandoAWD]

You're missing out. I drove turbo cars for the better part of my adult life; mild to nutty.

 

[dbx]

No. This is a turbocharged car. Let it get to operating temp if you plan to leave vacuum.

Agreed. I've read a lot about it, and also discovered that a lot of folks screw up their cars from doing what guybo suggested.

And my "3-5 min" warm up breaks down like this:
1st start of the day - 3-5 mins.
Within 3hrs of 1st drive - 1-2mins
Coming out of store, etc... - 30 seconds or so

Anyway....I still find the cool down time really long. I've owned over a dozens of cars in my lifetime, but none of them ever came close to giving off this much heat, hours after being parked. As long as it's normal...no problem, lol. It is my first turbo engine, so perhaps this is the difference here.

 

[guybo]

OK, good luck with your cars. Your thinking is based on cars from 30 years ago. Anyway....

 

[LandoAWD]

OK, good luck with your cars. Your thinking is based on cars from 30 years ago. Anyway....

Quite the opposite, and no luck required.
Edit: Your name just clicked. The bad advice makes sense.

 

[G-550616]

So what’s the answer to this question? I also have this concern with my 2018 genesis g80 sport I just got

 

[G-550019]

Look into getting a turbo blanket from Funk motor sports. It will reduce your surface turbo temp from 400+ degrees to just over 50°. Totally the best thing for hood heat reduction. Plus it helps to increase spool (and decrease turbo lag in smaller engines). It will also keep the rubber and plastic parts from degradation from the increased heat.

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[Casper_G70]

Look into getting a turbo blanket from Funk motor sports. It will reduce your surface turbo temp from 400+ degrees to just over 50°. Totally the best thing for hood heat reduction. Plus it helps to increase spool (and decrease turbo lag in smaller engines). It will also keep the rubber and plastic parts from degradation from the increased heat.

Which turbo blanket would you get for the 3.3 twin turbo g70?

 

[blinkenjim]

OK, good luck with your cars. Your thinking is based on cars from 30 years ago. Anyway....

I'm curious: what specifically has changed in 30 years to invalidate that thinking? Genuinely curious.