Hilux Surf 1KZ-TE Engine Running Temp?

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PostPosted: Thu Nov 15, 2012 3:34 am 
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Hard Yaka

Joined: Mon Oct 08, 2012 12:31 am
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Ok so it's the trans fluid that heats up the coolant? And the trans cooler that promotes engine overheating by restricting coolant flow into the engine?

So it'd be best to install the new Haydens cooler I have on the way before the standard cooler in series. Haven't heard of the bypass thermostat before. Would plumbing the external trans cooler before standard one be no good in your opinion without the thermostat bypass?

Just don't want to plumb it up in a way that is completely pointless or even makes it worse. And also like hearing everyones opinions and info! Cheers all!


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PostPosted: Thu Nov 15, 2012 4:04 am 
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Driver/Navigator

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Put it before the standard radiator cooler - so the oil flows through the aftermarket external cooler then through the factory radiator cooler ok.
FYI with the standard syatem In my experience the only time the trans gets really hot ie the red dash light comes on is when the radiator water gets too hot. thats why I said in the first place sort ya cooling system (fan) and you shouldnt have any problems. but an external cooler ant gunna hurt.


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PostPosted: Thu Nov 15, 2012 1:13 pm 
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Hard Yaka

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Yea thanks will do it before then. Ah so there is a warning light for auto overheating? Sweet was worried there wasn't.

Cheers for the fan clutch fluid heads up, the only one out of the million people i spoke to that even mentioned checking and topping it up!! And it did the trick. Still can't get over how loud it is now :twisted:


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PostPosted: Sat Nov 24, 2012 10:14 pm 
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Hard Yaka

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have you got a egt gauge? from comments ive heard over heating is the syemtom of high egts so maby look to make sure your egts arnt to high, also running your truck for a shorts periods with high egts is probably more likely to get your head to a tempreture where it will warp or crack or blow the head gasket being steel then your water temps, so while both things need to be checked egts also need to be watched as much as water, like others have said by the time your water temp gauage starts to move the damage is already done

i put one in my 1kz and keeping it sitting on about 2000rpm moters up a hill at about 500c but if i put my foot to the floor will go up to about 650C

the guy at the shop said never to let a 1kz to go over 700C

(sorry if iv repeted someone else as i didnt read all 5 pages)
i have a manual radiator and a small trans cooler and the a/t temp light hasnt come on yet


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PostPosted: Wed Nov 28, 2012 9:21 pm 
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Hard Yaka

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Yea, it's on the to-do list. Waiting for my auto cooler to arrive to fit that (thinking about by-passing the standard one to get it extra cool) then will look at the EGT gauge.


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PostPosted: Thu Dec 06, 2012 4:53 am 
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Hard Yaka

Joined: Fri Nov 28, 2008 11:05 pm
Posts: 122
Has anyone thought of putting a 16" electric fan or 2 12" electric fans on the back of there radiator to replace to viscos fan?

I have tired to re oil my fan hub and i didnt really notice a diff. Got pissed off and ended up drilling a hole through the hub and putting a bolt in and now it really roars. Prob not good in the long term with the bolt making it be off balance and might damage the water pump
Ive got a KZN185 and only have issues with temps raising when towing a small boat.

I have upgraded the radiator from 27mm thick to a 46mm
Changed thermostat to a 71c
External trans cooler in series before intank cooler
New exhaust 2 and a half inch and straight thru muffler
Reoiled fan hub (no change in noise)

After locking the fan hub i put a 1700kg block on concrete on a big tandem axle trailer and headed for a hill. It still got a little hot but wasnt a long enough climb to really test it and i was booting it

If anyone has any ideas on how i can improve the heating up of the engine while towing would be greatly appreciated, Or any ideas on running electric fans?

When i first got a the truck i would tow my boat from christchurch to the westcoast and up porters pass i was be doing 15kms with the gauge on 3/4

Cheers


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PostPosted: Thu Dec 06, 2012 12:54 pm 
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Hard Yaka

Joined: Mon Oct 08, 2012 12:31 am
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Wow, 3/4 on standard gauge? That's hot!!
Yea a mate of mine has 2x 10" fans and it works good, mind you his is manual. I don't think 2x 12" ones would fit? Do what I want to do, run biggest dual fans possible, hook them up to a thermostat as well as a hardwired on/off switch so when you know it's going to get hot fast you can flick the switch and force them on early. You'll also have a little gain in power as the viscous one takes a fair bit of effort to run - after oiling mine noticed a substantial loss in mid-high rev power.


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PostPosted: Thu Dec 06, 2012 3:48 pm 
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Hard Yaka

Joined: Fri Nov 28, 2008 11:05 pm
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I've had it il just below the red once. Not ideal at all
My top tank was at 105c and bottom only around 70c makes me think the thermostat is not flowing enough but it's brand new or water pump not pumping but that would be odd


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PostPosted: Thu Dec 06, 2012 4:01 pm 
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Hard Yaka
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Location: Southland
Thats one of the design flaws of having a thermostat at the inlet to the engine of the water cycle isn't it? It won't be opening fully as it has 70 degree water going past it in your situation, the termostat is not getting the 105 reading that it would if it was on the outlet (top hose).

Or maybe your cooling is too efficient :lol:

_________________
SWB V6 Paj with one or two mods ;)


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PostPosted: Thu Dec 06, 2012 5:57 pm 
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Hard Yaka
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Location: CHRISTCHURCH
Save your money :( , you may get away with a new head :o , that's if it doesn't dump all the water and seize the motor, then you can blame your Toyota hand grenade :oops: , got nothing to do with the person holding the pin.

THERES NONE SO BLIND AS THOSE THAT WILL NOT SEE,

FITZY.


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PostPosted: Fri Dec 07, 2012 12:46 am 
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Hard Yaka

Joined: Fri Nov 28, 2008 11:05 pm
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Lemon of a surf has had new head not long before I did all the other things
Since I have a company vehicle and only drive it when I take the boat away I might try remove the thermostat and just run if cold all the time, or sell it and buy another tow vehicle


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PostPosted: Fri Dec 07, 2012 1:52 am 
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Hard Yaka
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Location: invercargill.
What kind of mods are you running? Bigger tyre,winch,bar workand spot lights all can be contributing factors to these thing heating up. Also if the trans is working its arse off even with and external cooler it can heat the water up.
On the one of the aussie forums they did a test and found that twin electric fans will never pull as much air as a viscous fan. When it comes to cooling they know their stuff.

Also check the intake manifold for gunge build up as it can restrict air flow quite a bit. Getting rid of the egr makes a massive difference.
Check you injectors to. if they are worn they can be causing high egts which will in turn heat your water up


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PostPosted: Fri Dec 07, 2012 2:17 am 
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Hard Yaka

Joined: Fri Nov 28, 2008 11:05 pm
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Surf is standard. Standard wheels just some small a/t tyres
I only use it for towing a small boat very frustrating


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PostPosted: Fri Dec 07, 2012 4:32 am 
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Hard Yaka
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Location: invercargill.
get the trans and/or injectors checked. Stuffed trans will heat things up. worn injectors will give to much fuel which will cause high temps as well.


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PostPosted: Fri Dec 07, 2012 7:24 pm 
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Hard Yaka

Joined: Mon Oct 08, 2012 12:31 am
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Is checking the injectors on these an easy thing that can be done at home?


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