TB48 running hot

Engines and Engine Systems
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Billy
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TB48 running hot

Post by Billy » 08 Nov 2017 09:39

Hi all. I have a 2008 Patrol 4.8 (126 000km) which runs hot under heavy loads (towing, sand driving, etc), especially under high ambient temperatures. It also gets hot after the engine has been shut off and then turned on after a few minutes. Radiator has been cleaned and coolent replaced recently. It comes down quite quickly when I turn the air con off and put the fan on max temp, max speed. Any ideas where to start looking?

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Re: TB48 running hot

Post by iandvl » 08 Nov 2017 09:49

Billy wrote:
08 Nov 2017 09:39
Hi all. I have a 2008 Patrol 4.8 (126 000km) which runs hot under heavy loads (towing, sand driving, etc), especially under high ambient temperatures. It also gets hot after the engine has been shut off and then turned on after a few minutes. Radiator has been cleaned and coolent replaced recently. It comes down quite quickly when I turn the air con off and put the fan on max temp, max speed. Any ideas where to start looking?
If radiator has been checked, cleaned etc, and properly bled following that, I think the only thing left could be the viscous fan. I'd suggest you have that checked.

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Re: TB48 running hot

Post by IanT » 08 Nov 2017 09:52

Yes I would also have said radiator but has been done, over one I would check is the thermostad

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Re: TB48 running hot

Post by Kagiso II » 08 Nov 2017 12:35

Also check gearbox & diff oil levels.
Do you have an aftermarket Burnco or such front bumper on?
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Re: TB48 running hot

Post by Billy » 08 Nov 2017 12:48

Kagiso II wrote:
08 Nov 2017 12:35
Also check gearbox & diff oil levels.
Do you have an aftermarket Burnco or such front bumper on?
Yes, running a ARB bull bar

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Re: TB48 running hot

Post by Kagiso II » 08 Nov 2017 12:57

Billy wrote:
08 Nov 2017 12:48
Kagiso II wrote:
08 Nov 2017 12:35
Also check gearbox & diff oil levels.
Do you have an aftermarket Burnco or such front bumper on?
Yes, running a ARB bull bar
Please also see this thread: viewtopic.php?f=44&t=1826

Also check and check and then re-check the TIMING the engine runs on. I had it when the timinmg on my V6 was out a little bit, the Ngamiland sands would make it run hot[ter] and especially, it would increase temp after switching off [though many engines do that anyway, hence the Volkswagen platkarre will start running their fans after you switch of and lock up.. ]
Don't bring God down to your level of faith ... bring your faith up to His level!

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Re: TB48 running hot

Post by Tinus lotz » 08 Nov 2017 20:39

Remove your grill and have a look at your aircon radiator ....mabe you have a grass or mud problem ....just dont clean it with a pressure washer ....just burn it clean if it is seed

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