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  #1  
Old 29-12-2013, 05:07 PM
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Default Overheating issues

Ill apologise in advance for any bad spelling posting this off my phone.


Im having overheating issues with my 03 gu ute. When I first got it it was completely stock. Since then its had a shroud put on, 3inch exhaust, new fan, the radiator would only be about a year old and has had a complete flush and test and is in perfect condition. Also 4inch snorkel and custom airbox.

So what im measuring the temp from is a gauge in the top hose of the radiator around town it sits about 80-85c while on the highway its 100-110 this relates on the dash gauge to when its 100 its just below half which is normal then when it hits 110 it moves to just below 3/4 of the guage.

So its been overheating while on the highway with ac on sitting on about 400 on the pyro as soon as I get to a hill it heats up straight away. So what im asking is what ideas can I try to make this work better I dont particularly want to buy a big intercooler. Its got 4"lift 35mtr (so a big 35) the bullbar would restrict airflow to and extent but not alot more then standard id think only has 20" lightbar.

The ideas I can come up with are

Thermofans
Intercooler (has a standard one )
Bigger radiator ( current one is brand new )


Any input would be great

Cheers Jamie
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Old 29-12-2013, 06:28 PM
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Do you have spotties on the bar?
Mine did this but after going up hills for a while.
Was the spotties blocking airflow to the radiator.
I checked the water pump and the whole system but it was just that.
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Old 29-12-2013, 06:43 PM
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Quote:
Originally Posted by powerlines View Post
Do you have spotties on the bar?
Mine did this but after going up hills for a while.
Was the spotties blocking airflow to the radiator.
I checked the water pump and the whole system but it was just that.


Just a 20"light bar so not as bad as two spotties
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Old 29-12-2013, 07:27 PM
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Check thermostat works properly,
Pull it out, put in a cup add boiling water. If it takes time to move or slides on one side of the shaft ot might not be opening enough.
Water pump fins might be wearing thin.
Your viscous fan isn't working to its full capasity, easy cheap fix, (2 hours $14) if the internal springs are in good work.
Does it use water?
Next time it starts getting hot, pull over and check the overflow bottle, is it full?
The radiator cap may also be faulty.
Simple in expensive checks before you go changing big useless expensive items.
Intercooler won't do *^": all.
Unless your running higher boost with big engine mods you shouldn't need a bigger radiator if its just your runaround/ not towing big caravans.
Thermos IMHO are a waste of time! Unless its something of a comp vehicle or you need to squeeze as much Horse Power out of it as possible, as a viscous fan can take up to as much as 10HP when in full motion.
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Old 30-12-2013, 06:34 AM
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Check you have all the factory rubber flaps on the inner guard and the wind deflector plate under your bullbar (you may have to make one for your bullbar) to direct airflow under the car. This all helps stabilize the temps by improving the airflow through the engine bay.
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Old 30-12-2013, 07:58 AM
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You can get high flow thermostats
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Old 30-12-2013, 08:33 AM
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Running normal.
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Old 30-12-2013, 08:47 AM
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Sorry to hijack your thread - Mine was doing this yesterday too but was driving in 49 degree heat with aircon on with heaps of hills, actually all hills! With 4 people in car and fridge etc. Drove from monkey Mia to Geraldton. EGTs were around 350-420 pre turbo.

My temp was around 100 then when hitting hills got to 105. The normal temp gauge did not move at all. Is this a problem? Should I rely on the normal temp gauge.

Cheers.
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Old 30-12-2013, 11:37 AM
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Normal temp guages dont move between 80c & usually 110c for a good reason.
Could you imagine how many phone calls all the dealers would get from dimwits watching it move every 2 or 5 degrees.
Its designed this way to basically keep the masses calm and unaware of how much things change as you drive.

If you already have an aftermarket digital temp readout then watch that one,
If not , a good cooling system should be able to cope 95% of the time,
If your always in a hot climate and have an auto I would definitely recommend bypassing the auto fluid away from the radiator, and probably get yourself a 5 row radiator fitted,
Probably a high flow thermostat or a 5mm drill bit and enlarge the side holes of a standard thermostat.
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Old 30-12-2013, 12:03 PM
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hi bogged36.

i live in the hot NT and also wonder if i need a thermostat installed or should i just pull it?

what is this viscous fan you refer to ?

i have a manual - any recommendations there to keep it cooler?

grunge
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Old 30-12-2013, 01:13 PM
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Never run without a thermostat
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