Hilux Surf 1KZ-TE Engine Running Temp?

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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby bronx89 » Thu Nov 15, 2012 9:34 pm

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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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby wsr4x4 » Thu Nov 15, 2012 10:04 pm

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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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby bronx89 » Fri Nov 16, 2012 7:13 am

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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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby 1justin » Sun Nov 25, 2012 4:14 pm

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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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby bronx89 » Thu Nov 29, 2012 3:21 pm

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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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby Xr246 » Thu Dec 06, 2012 10:53 pm

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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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby bronx89 » Fri Dec 07, 2012 6:54 am

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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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby Xr246 » Fri Dec 07, 2012 9:48 am

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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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby NJV6 » Fri Dec 07, 2012 10:01 am

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:
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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby SMOKEY » Fri Dec 07, 2012 11:57 am

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,

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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby Xr246 » Fri Dec 07, 2012 6:46 pm

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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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby crazyclark31 » Fri Dec 07, 2012 7:52 pm

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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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby Xr246 » Fri Dec 07, 2012 8:17 pm

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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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby crazyclark31 » Fri Dec 07, 2012 10:32 pm

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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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby bronx89 » Sat Dec 08, 2012 1:24 pm

Is checking the injectors on these an easy thing that can be done at home?
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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby Xr246 » Sat Dec 08, 2012 4:53 pm

Checking the injectors can not be done at home.
You will need to pull the injectors out and take them to a diesel pump shop
Injectors that are worn and inject more fuel will not cause more heat in your engine. It will cause black smoke. If the injectors were delivering less fuel and running lean it would cause issues

Any way today i got up early and started pulling apart everything in the cooling system to see what my problems could be. Was going to leave the water pump because what are the chances of the impeller breaking off. Pulled the water pump off to find the angle bits on the impeller missing. New water pump installed

Now i just need a viscos fan and ill take it for a test run

Anybody have a spare viscos unit for 1kz-te for sale?
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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby Xr246 » Sat Dec 08, 2012 4:59 pm

Not sure how to put pics on this site
I just put the picture on my facebook heres the link

http://www.facebook.com/photo.php?fbid= ... =1&theater
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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby Taz » Sat Dec 08, 2012 5:13 pm

Xr246 wrote:Not sure how to put pics on this site
I just put the picture on my facebook heres the link

http://www.facebook.com/photo.php?fbid= ... =1&theater


:shock: :shock:

wft! Looks like they were never even there to start with?
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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby Xr246 » Sat Dec 08, 2012 5:23 pm

the edges are sharp and look like something use to be there like a break. the new water pump steel on the inpeller is 3 times the thickness so a lot better quality product
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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby bronx89 » Sat Dec 08, 2012 6:15 pm

Holey shit lol looks like a cheap chinese knock off one. How is your truck still alive.
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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby crazyclark31 » Sat Dec 08, 2012 7:09 pm

[quote="Xr246"]Checking the injectors can not be done at home.
You will need to pull the injectors out and take them to a diesel pump shop
Injectors that are worn and inject more fuel will not cause more heat in your engine. It will cause black smoke. If the injectors were delivering less fuel and running lean it would cause issues

sorry but this has been done many times.

A diesel motor works the opposite to a petrol motor when it comes to fueling issues.
With diesels The more air you can jam in with a given fuel amount the power you get with out exessive heat.
If it has black smoke then it is over fueling which will cause high combustion temp and exhaust temps and will melt pistons/crack heads. Anyone with an egt gauge will tell you this.
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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby Xr246 » Sat Dec 08, 2012 7:16 pm

I've towed the boat all over the South Island like this traveling very slow on hills very surprised my truck is still alive!! It got hot quite a few times. Very lucky I'd say has bad a new head tho just before I brought it.

I should of known that being a quailified heavy diesel mechanic for 7 years now. On earth moving gear tho never have heating issues like these tho
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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby bronx89 » Sun Dec 09, 2012 6:19 am

So if my truck is not spitting any black smoke even under load and giving it shit is there any point in checking the injectors?
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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby bang-thud-thump » Sun Dec 09, 2012 12:04 pm

That pump is what no coolant does for your engine. The impeller just rots away. Hoses go rock hard. Stuff leaks.
Coolant is the cheapest insurance available.

if you are concerned about the auto cooler in the tank (even when by passed which it always should be - not in line with an air to oil unit)than have a look at it when you get the tanks removed to get it rodded out.

I would think it wouldnt make sod all difference.

Using a garden hose tells you it isnt completely blocked only, not that 25% is gummed up.

Its as good as feeling the gas exiting the tail pipe to determine EGT.
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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby bronx89 » Mon Dec 10, 2012 6:11 am

So you're saying the standard one shouldnt be used at all but can stay in there, and only an air to oil one should be used? Would you say my 9" x 6" x 3/4" would be big enough?

Oh and my AT Oil light came on again yesterday on the beach before going near any water so the AT must def be overheating..
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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby crazyclark31 » Mon Dec 10, 2012 7:24 am

not really if you go on the beach. Not sure how many rows that is but mines a 25 and i think its a bit small.
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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby 1justin » Tue Dec 11, 2012 8:27 pm

gez no fins that must be an old pump weird replacing a head and not checking the water pump, lucky it survived so long(water pumps fins will rust if you dont use antifreeze along with other things in your cooling system)

(injectors)if you just want to see if they are causing a tempreture problem would be alot cheaper to just put in the egt gauge than get all your injectors checked, but if its old can be a good idea anyway if there not correct, will help with fuel efficieny,

intercoler
water injection
higher boost
can all help bring temps down

is your at cooler still going through the raidator cooler aswell?
if so thats weird that with that much cooling would still over heat should cheack that its pumping properly and that theres no blockages, guess a cheap way of doing that is one pipe leaving the trans is hot and one is cold will tell you if theres a block
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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby bronx89 » Tue Dec 11, 2012 8:35 pm

1justin wrote:gez no fins that must be an old pump weird replacing a head and not checking the water pump, lucky it survived so long(water pumps fins will rust if you dont use antifreeze along with other things in your cooling system)

(injectors)if you just want to see if they are causing a tempreture problem would be alot cheaper to just put in the egt gauge than get all your injectors checked, but if its old can be a good idea anyway if there not correct, will help with fuel efficieny,

intercoler
water injection
higher boost
can all help bring temps down

is your at cooler still going through the raidator cooler aswell?
if so thats weird that with that much cooling would still over heat should cheack that its pumping properly and that theres no blockages, guess a cheap way of doing that is one pipe leaving the trans is hot and one is cold will tell you if theres a block


Yep still running both, external first. Both pipes get hot, so must be pumping fine? I think my tube and fin cooler is just too small.

8cyl Davies Craig one is going to fit lets hope this finally sorts the auto trans overheating issue.
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Re: Hilux Surf 1KZ-TE Engine Running Temp?

Postby bronx89 » Thu Jan 31, 2013 11:19 am

Never updated this thread. Ended up having to ditch in-rad cooler as they are bad news either way they are hooked up. Running a big 8cyl DC cooler on it's own with a genuine 71'C Toyota thermostat, cleaned and flushed out radiator, fan clutch oil replacement and AC fan switch. Temps are soooooo cool now. Def recommend doing this for your auto surf especially if it goes on the beach. Had about a 15'C drop in temps under all conditions on and offroad compared to before hand.

Also stopped the AT Oil Temp light coming on so that paired with the low engine temps mean the AT is running nice and cool too. And cooler trans equals longer lasting trans.
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