hodge Posted July 17, 2011 Share Posted July 17, 2011 Just had the car out for a steady drive for a couple of miles to my parents house after it was warm and all was good. I kept the car under 3k and had no issues as all. On the way back I increased the revs a little to almost 4k again car drove fine but noticed the stock water temp gauge and risen upto just over 3/4 very close to the red mark as I pulled into my street. As I stopped the temp was very quickly dropping. I turned off the car and went for the laptop to check an acurate temp on the syvecs, and the temp was around 100 degrees which odviously it had been higher than the when I was driving for a short period of time. The water pump on the car has done 193000km and the car only has water in it at present. Now because of the increased size of the water system now for the big twin setup, is it possible that the pump just can't cope anymore. I am ordering a water pump and thermostat tomorrow anyways wether this issue had arisen or not. What do you guys think, could there be any other reason for this rise in temps. I've also posted this in Johnnys project thread too. Any input would be great Thanks John Quote Link to comment Share on other sites More sharing options...
CanisLupus Posted July 17, 2011 Share Posted July 17, 2011 Could be that the pump can't flow enough because of it's age. Also Water only doesn't get as much heat transferred as when it's mixed with Coolant. Quote Link to comment Share on other sites More sharing options...
Ian C Posted July 18, 2011 Share Posted July 18, 2011 Check the rad cap as well. If it's as old as the engine, it'll probably not be holdig the pressure very well. Quote Link to comment Share on other sites More sharing options...
hodge Posted July 18, 2011 Author Share Posted July 18, 2011 It's a new SRD rad Ian which came with it's own cap. Quote Link to comment Share on other sites More sharing options...
EMPEROR Posted July 18, 2011 Share Posted July 18, 2011 My old Audi A3 had the same problem, it was old enough, so the fin actually detached of the axle. It was still there, just was turning freely. I doubt this will be the case with the Supra, but the result was just exactly the same... Quote Link to comment Share on other sites More sharing options...
dandan Posted July 18, 2011 Share Posted July 18, 2011 Where did you take the water feeds for the turbos from and where do the returns go mate? Quote Link to comment Share on other sites More sharing options...
jackso11 Posted July 20, 2011 Share Posted July 20, 2011 First thing I would do is change that water pump, that mileage is massive on a pump, they are usually changed when the cambelt is! My overheating problems were very similar and I changed everything Bar the radiator on the cooling system, last thing I changed was the zircon fan at the front of the car and also found out the connection on the tiny fan in the rad cowl was bad. Now both those fans work properly the overheating seems to be fixed, waiting to test it on a got day now to see if it gets too hot. When the problem happens is your aircon on or off? The aircon rad could be heating the other rad up if it's on. Also check the 30amp fuse that is for the two fans, it's in the fusebox under the hood, pink min pal fuse. Quote Link to comment Share on other sites More sharing options...
Thomas.B Posted July 20, 2011 Share Posted July 20, 2011 Cant it be thermostat? I am too changing my thermostat and it looks impossible to get to from the top... has anyone been able to change from the top of the engine? I cant get to my lift until next week and want it done Quote Link to comment Share on other sites More sharing options...
jackso11 Posted July 20, 2011 Share Posted July 20, 2011 you can change the stat from the top, did mine Quote Link to comment Share on other sites More sharing options...
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