Extreme Moab heat + uphill climb + sloshing causing temp issue? (1 Viewer)

[04UZJ100]

Alright, I’m not worried now.

Sounds like a combination of user error and hellish conditions. And y’all are way less paranoid than I am

Teck’s point about the radiator shroud is a good one, might go dig it out if my shed.

The 2016 LX plastic shrouds are way less intrusive and cover far less than 2008-2015’s.

I modified our 2014 plastic so I can monitor the radiator yet still provide the necessary airflow direction through the shroud and radiator.

 

[borfoo3]

Doesn’t the 200 come stock with an aux fan mounted up front specifically for AC?

Yes it does, sorry for the confusion. I meant adding a 2nd fan as well, so 2 electric fans + 1 main clutch fan behind them, totaling 3 fans.

The Pajero my friend runs with me is now on 4 fans! 2 electric, 1 main + 1 small unit in front of the stock trans cooler that he runs by switch in the cabin

 

[Wicked0ne18]

Thx for the thread. Glad I’ve seen this.

 

[TeCKis300]

Digging up an old post on the engine shrouds and the section that important for radiator performance

ARB Twin on Slee bracket under hood - photos on LX?

I'm close to pulling the trigger on the Slee bracket for the ARB twin, but I've only ever seen photos of it mounted on the LC, and not on the LX. The LX has fairly large, plastic engine covers, and I'm curious to see whether anyone has managed to fit the covers with the compressor installed? I'd...

forum.ih8mud.com

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I wouldn't be so quick to remove the engine covers. The "engine bay heat" discussion is a red herring IMO. Besides, Lexus validated it so it's not causing any "more" heat to be of concern to negatively impact anything.

What is important is that the LX engine covers are a part of the airflow guides underhood. Specifically in the forward part of the engine bay where it covers the radiator. That's the part that really matters at speed to guide airflow into the radiator instead of over. And at low speed, prevents hot air from the engine bay being drawn and recirculated through the radiator. That's the heat management part that really matters.

It does also keep the engine bay cleaner as it has a second seal.

LC radiator cover:

Lexus radiator cover integrated with the rest of the engine bay:

So unless one want to chop the Lexus covers, I would keep them on. Doesn't hurt that they help the LX meet Lexus levels of NVH.

Unfortunately, doesn't look like the LC covers will work on the LX

 

[Markuson]

- The ONLY scenario where I've slight the temp gauge 1 'tick' higher than normal is when REALLY pushing hard in deep sand or dunes. I'm talking engine screaming over 4000 RPM all day, on 4HI, @~130F ambient temps (ground temp is even higher than this!) where the whole underside of the vehicle is essentially 'cooking' in sand..

Otherwise, these vehicles are known to take a lot of punishment without sweat.

This last bit is more in keeping with what I’ve seen during my own hard use in extreme heat…which is why I wonder if there is another issue in his cooling system.

 

[96bruizer]

Let’s clarify a few things here though. I believe the original post was referring to an 80 series? Much different than the 200

 

[TeCKis300]

Let’s clarify a few things here though. I believe the original post was referring to an 80 series? Much different than the 200

OP has a 2008 LX570. Nicely built one at that. He has a build link in his sig but in case you're on mobile and can't see it, copied here

Builds - Travis’s PNW LX570

Here is the truck as of November 2024 Read on to see how I got here! Hi everyone! I picked up an '08 LX a few months ago and started poking around here but haven't started a thread yet. I came from a 2004 Suburban (build) that I used to drag kids, wife, and dog all over WA: Aside...

forum.ih8mud.com

 

[Markuson]

Let’s clarify a few things here though. I believe the original post was referring to an 80 series? Much different than the 200

?
My vision is messed up…but I’m not seeing OP referring to an 80.

 

[96bruizer]

?
My vision is messed up…but I’m not seeing OP referring to an 80.

my mistake, I thought he was. carry on...

 

[CruiserFan88]

Why would the LX need more air flow via the engine covers and the LC not need such airflow? If they indeed helped that much where they need to be left on for heat management, the engine must know its in an LC and thus runs cooler? Toyota and their self-aware engines, hot damn..

 

[borfoo3]

Why would the LX need more air flow via the engine covers and the LC not need such airflow? If they indeed helped that much where they need to be left on for heat management, the engine must know its in an LC and thus runs cooler? Toyota and their self-aware engines, hot damn..

Not entirely sure, but guess is the LX needs to have less NVH transmitted vs the LC, and is a few hundred lbs heavier so guess the covers help with both...

 

[04UZJ100]

Why would the LX need more air flow via the engine covers and the LC not need such airflow? If they indeed helped that much where they need to be left on for heat management, the engine must know its in an LC and thus runs cooler? Toyota and their self-aware engines, hot damn..

It’s not. They’re functionally identical from an airflow perspective. The slim cover of the Cruiser directs the air just as the larger ones of the LX.

Lexus and other luxury makers have always covered ‘private parts’ in plastic. Whether that has a measurable or noticeable change in NVH is hard to verify.

 

[AnyMal]

It’s not. They’re functionally identical from an airflow perspective. The slim cover of the Cruiser directs the air just as the larger ones of the LX.

Lexus and other luxury makers have always covered ‘private parts’ in plastic. Whether that has a measurable or noticeable change in NVH is hard to verify.

The LX is just a more modest and classy gal.

 

[04UZJ100]

The LX is just a more modest and classy gal.

Supple inside too

 

[Markuson]

It’s not. They’re functionally identical from an airflow perspective. The slim cover of the Cruiser directs the air just as the larger ones of the LX.

Lexus and other luxury makers have always covered ‘private parts’ in plastic. Whether that has a measurable or noticeable change in NVH is hard to verify.

Fe LX vs LC engine bay plastic…
I think some folks forget that both LX and LC engine bays have full “covers” when in use…that prevents air from just hovering around…

Its called a “hood.”

Once the hood closes…it essentially mimics the perty LX “cover” that hides all those dirty, messy thingies some markets like to hide from view...and helps move air through the bay.

If the same LC 5.7 that is also the LX 5.7 truly needed special air direction plastic…or is somehow inadequately functions without it? -The LC would get it too. But it doesn’t…so it didn’t.