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Location:
Glossodia,NSW
Registered:
May 2002
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Normal operating Temp?
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Sat, 28 September 2002 12:04
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What should the the temp gauge read at normal operating temp on an ae82 corolla? Mine was only just off the C.I put in a new thermostat today and it now sits about a quarter of C.Does this sound right?
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I supported Toymods
Location:
Berowra-Sydney
Registered:
July 2002
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Re: Normal operating Temp?
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Sat, 28 September 2002 23:05
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also can someone answer this for me.
What is the normal operating temp for an engine in x'C
1. What is the desired normal operating temp?
2. what would you consider getting a bit to hot?
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Toymods Board Member
I supported Toymods
Location:
Turramurra, Sydney.
Registered:
May 2002
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Re: Normal operating Temp?
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Sun, 29 September 2002 00:38
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Normal operating temp for a 4A-GE is 82 degrees C. I think this goes for most engines too. The standard thermostat for a 4A-GE is supposed to operate between the ranges of 82 and 95, so I'd say about 100 is getting pretty hot.
If you've just put in a new 'stat, and your car's running way too cool, check that the 'stat is sitting inside the housing properly, and isn't cocked to one side. Was it a genuine toyota thermostat?
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Location:
Glossodia,NSW
Registered:
May 2002
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Re: Normal operating Temp?
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Sun, 29 September 2002 01:09
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No the thermostat i put in was not a genuine toyota one,i didn't think it mattered so i just got one from Auto1.In regards to the standard temp,i just want to know what position the temp gauge should sit at.Should it sit at half-way,just off half or a quarter.
Cheers Adrian
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Location:
Brisbane / Gold Coast
Registered:
May 2002
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Re: Normal operating Temp?
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Sun, 29 September 2002 01:55
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On the guage the needle should never ever move from the middle. That depends on the sensors though, as they're all a little different. But where it normally sits is where it should stay. Because of the odd way the 4AGE water system works you will get little warning of the engine running out of water and so it's worth making sure that it's in good condition.
FWIW, with the Motec read-outs I can see that my water temp from the sensor at the back of the head normally runs at about the low 80's, but will creep up to 86°C and that's when the thermofan cuts in. I've seen 99°C (don't ask) with the instrument panel gauge still sitting right in the middle though, so again there's not much warning of impending trouble.
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Location:
Coffs
Registered:
May 2002
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Location:
Glossodia,NSW
Registered:
May 2002
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Re: Normal operating Temp?
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Sun, 29 September 2002 05:11
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Bill,thank you very much for your help,you are the 4age god.My 4age was always blowing black smoke,until this weekend when a mechanic told me my car was running cold and that i should replace the thermostat.My car never got of the C and this would result in the computer running richer mixes .So i changed over the thermostat and now the gauge will sit a 1/4.You said it should be in the middle,so would you say there is still some problem.What would you recommend me doing.Should i replace the water temp sensor,what else controls the temp of the car.
I forgot to mention it is a ae82 corolla with the later ae92 100kw 4age in it.I have no oil cooler or power steering.
Cheers Adrian
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Location:
sydney
Registered:
May 2002
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Re: Normal operating Temp?
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Sun, 29 September 2002 07:24
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you need to check the temp with a gauge that shows the temp in degress not just hot and cold.The gauge might be showing signs of age.
Also you want the car to run as close to boiling as possible with out boiling and remember that water under presure will boil at about 120*c not 100 as most people think.On a street car I would stick to between 80-90 due to traffic unless you have a very good cooling system
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Location:
Brisbane / Gold Coast
Registered:
May 2002
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Re: Normal operating Temp?
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Sun, 29 September 2002 07:58
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WOW16V, that temp is probably fine. That's where the needle sits, and that's were it should stay - on that car, with those sensors and with that gauge! 
But as Toyrota said, you really should measure the temperature properly with an accurate gauge that measures in °C so you know what you're getting for sure.
I disagree with the running 's close to boiling'thing though as it leaves no margin for error. Low 80's is good.
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Location:
Coffs
Registered:
May 2002
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Re: Normal operating Temp?
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Sun, 29 September 2002 12:28
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| rollaboy wrote on Sun, 29 September 2002 14:53 |
Should my Oil cooler on my 4age be hot after a 30-45min drive??
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Anyone..
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Location:
Travelling overseas
Registered:
July 2002
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Re: Normal operating Temp?
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Mon, 30 September 2002 00:17
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My temp gauge sits on the C until I have been driving for about 20-30 mins when it slowly raises to about 20-25% towards the H and stays there.
Is that taking too long to warm up?
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Location:
Melbourne
Registered:
May 2002
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Re: Normal operating Temp?
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Mon, 30 September 2002 02:12
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Bill,
How did you go about mounting a temp sensor on your 4AGE?
I have a 4AFC at the moment and I assume for the time being that the water system is similar to the 4AGE in that little warning is given before critical mass. 
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Location:
Brisbane / Gold Coast
Registered:
May 2002
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Re: Normal operating Temp?
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Mon, 30 September 2002 02:58
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Rollaboy, yes, it should have some temperature to it. I'd guess about 85°C - 90°C or so.
Inertia, I just plugged the sensors in the factory spots on my engine. I've kept all that dead stock on the engine as they work fine.
I'm not sure about the FWD engines, but the RWD 4A's of either the single or twin cam type have exactly the same water system.
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Location:
Coffs
Registered:
May 2002
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Re: Normal operating Temp?
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Mon, 30 September 2002 11:15
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| Bill Sherwood wrote on Mon, 30 September 2002 12:58 |
Rollaboy, yes, it should have some temperature to it. I'd guess about 85°C - 90°C or so.
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Well it sure wasnt 85ºC - 90ºC when i touched it.
 I think its not working then
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Location:
Brisbane / Gold Coast
Registered:
May 2002
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Re: Normal operating Temp?
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Tue, 01 October 2002 01:44
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I'm only guessing because I haven't used one of those types of cooler before, but the oil temp normally sits about 10°C hotter than the water temp does.
From memory, the 4AGE oil cooler system uses a bleed-off from a sandwich plate under the oil filter, so it may not have much oil passing through it, so it might feel cooler because of less flow.
Just a guess ....
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