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Location:
adelaide
Registered:
March 2005
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AW11 4AGE MR2 underheating
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Tue, 08 March 2005 06:03
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hey guys,
i have put a deposit on an AW11 4AGE mr2 and when i took it for a drive, the temperature guage took probably 10 minutes to rise above C on the temp guage and it barely went 1/4 up the guage, do i have a problem here? or is that normal?
when i turned the heater on the it didn't seem very warm at all, which makes me think the guage was reading true. Everything else with the car seems to be in order, maybe there's no thermostat in the housing (if they come seperate?) so the engine doesnt get a chance to warm up.
I do know that the mr2 has something like a 12 litre cooling system, but i didn't think it would be too efficient 
any info or experience would be appreciated.
thanks
-mike
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Location:
Toronto, Downtown
Registered:
September 2004
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Re: AW11 4AGE MR2 underheating
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Tue, 08 March 2005 07:13
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sounds like there is a air lock in the cooling system where someone has changed the coolent incorrectly or the thermostat is rooted.
If the thermostat is rooted it will stay open allowing the water to continually run through the block and then to the radiator meaning the engine will run really cool. Its a common problem in 4age's especially if some dingbat has used green coolant in it or mixed green coolant with red coolant.
Only use red coolant in 4age's.
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Location:
Toronto, Downtown
Registered:
September 2004
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Re: AW11 4AGE MR2 underheating
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Tue, 08 March 2005 07:13
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the thermostats usually rust
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Location:
Melbourne
Registered:
May 2002
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Re: AW11 4AGE MR2 underheating
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Tue, 08 March 2005 21:52
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ive had a number of aw11's come in with broken thermostats. only the aw11 for some reason has this problem - but the description is as per a failed (broken open) thermostat
T
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Club Member
Location:
sydney
Registered:
May 2002
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Re: AW11 4AGE MR2 underheating
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Tue, 08 March 2005 21:56
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could also be a faulty sender, but id look at the thermostat first as well.
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Location:
in a box
Registered:
March 2003
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Re: AW11 4AGE MR2 underheating
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Wed, 09 March 2005 01:17
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ahaha happend to mine!!!
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Location:
adelaide
Registered:
March 2005
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Re: AW11 4AGE MR2 underheating
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Wed, 09 March 2005 04:54
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| IRA11Y wrote on Wed, 09 March 2005 08:26 |
could also be a faulty sender, but id look at the thermostat first as well.
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well i thought about that, but logically if the heater seems to be barely hot then u'd think that the coolant running through it isn't warm enough for it to work properly. so i'd say the guage is on the money, and that the thermostat either isn't there or has been stuck open.
The AW11 seems to have a funny coolant system, how do i get the air ou of the system? what are the steps to letting all the coolant out and refilling it?
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Location:
Toronto, Downtown
Registered:
September 2004
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Re: AW11 4AGE MR2 underheating
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Wed, 09 March 2005 06:03
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| dr trim wrote on Wed, 09 March 2005 15:54 |
| IRA11Y wrote on Wed, 09 March 2005 08:26 |
could also be a faulty sender, but id look at the thermostat first as well.
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well i thought about that, but logically if the heater seems to be barely hot then u'd think that the coolant running through it isn't warm enough for it to work properly. so i'd say the guage is on the money, and that the thermostat either isn't there or has been stuck open.
The AW11 seems to have a funny coolant system, how do i get the air ou of the system? what are the steps to letting all the coolant out and refilling it?
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its complicated but buy a haines manual and it will tell all. What i do when flushing the coolant is the run the engine untile hot then flush with the engine running leaving the heater on then once the water is clear turn off the hose start to put in coolant until the water comming out the radiator is red then turn the hose off and fill with coolant.
Id put my money on the thermostat its a common problem with all 4ag engines when run with green or no coolant at all.
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Location:
Newcastle
Registered:
July 2003
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Re: AW11 4AGE MR2 underheating
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Wed, 09 March 2005 07:41
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to fill the coolant look at the radiator it gives a good run down on how to do it... else.
take off the under carrage lining and you will see two pipes for coolant. about where your feet sit you will find two 10mm bolts. whip them out and you will start getting poured in coolant.
there is also a block drain but it is conveniently located underneath your air conditioning compressor. (hence i couldnt be bothered)
drain the coolant from those drain points *theres a bit of it* then i blast it with the hose (drom the filler point) flush out any crap. then make sure its all drained. get the hose supplied (in the frunk next the the master cylinder behind the plastic lining.
then attach it to the connector on the radiator (top passenger side) and open the valve a few turns.
make sure you have all the drain bolts in. then ive always done it with the tail slightly jacked up, start filling until you get coolant coming up the hose. once it stabilies the level in the hose (attach it to the hood lining) then close the valve.
attach the hose to the similar attachment on the heater inlet. and again fill until it is coming up the hose. close.
then there is a third bleed point on the hose located above the gearbox. attach it to that and again contrinue filling until the hose has coolant in it. close the valve. keep filling until you can see coolant running up the hose into the overflow bottle. (or does it not have the external hose just straight to the bottle) cant remember it may just go straight to the bottle.
then top it up until it is full run the engine for a bit and top continue to top until she will take no more top up the overflow bottle (worth taking out and cleaning whilst your at it) and voila your done.
oh and remember to use toyota red coolant.. its the shit 
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Location:
adelaide
Registered:
March 2005
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Re: AW11 4AGE MR2 underheating
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Wed, 09 March 2005 08:34
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well i've bought the car from a toyota dealer (yes car yards suck, but parents know the owner so i got a reasonable price) u'd wanna hope they've put the right coolant in there.
also when i drove it, at sitting at 100kph, the car seemed to sort of.. shimmer, i read somewhere it can be the tyres done up too tightly, is this actually a problem? when i went down a steep hill at 100 and braked, the car would shudder, but under normal braking it was perfect..
hmm?
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Location:
Toronto, Downtown
Registered:
September 2004
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Re: AW11 4AGE MR2 underheating
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Wed, 09 March 2005 12:51
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sounds like warped rotors.
toyota may have put the right coolant in but the previous owners mechanic may not have for god knows how many years.
anyways would have paid to get a nrma inspection b4 buying.
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Location:
adelaide
Registered:
March 2005
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Re: AW11 4AGE MR2 underheating
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Thu, 10 March 2005 05:57
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well they are friends of mine, so i don't expect them to stooge me if something comes up. can't u just machine warped rotors? somehow it doesn't sound right..
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Location:
Toronto, Downtown
Registered:
September 2004
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Location:
Templestowe, Melbourne
Registered:
January 2005
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Re: AW11 4AGE MR2 underheating
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Thu, 10 March 2005 08:56
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| 4agte wrote on Tue, 08 March 2005 18:13 |
Only use red coolant in 4age's.
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Stupid question, but why only red? Whats the difference?
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