Is200 Sport Overheating Problems :(

[markysparky]

hi all im new to this forum as this is my first Lexus. I have a 2002 plate Lexus IS200 sport auto. I haven't had it long so have no real history on the car. basically Im able to drive the car for 30-50 miles on and off before it starts to overheat. I have replaced the radiator, thermostat and temp control sensor at the bottom of the rad. ive checked to make sure the fans are coming on and they are if left on tickover. but when it starts to overheat iv checked and they are not running. I also hear a wee gurgling noise when I pull off from behind the dash(heating matrix) I think. Ive gave the car a couple of engine flushes till there has been no gumph coming out too and that seems fine.

does anyone know if there are any cylinder head issues with these? ive always been lead to believe Lexus/Toyota are bombproof which is why ive always wanted one

thanks mark

[ahmedali44]

Have u checked oil if it's mixed water then it could b headgasket or a hairline crack in head can u c smoke coming from bonnet???????have ur temp gauge checked. Take it to garage @ get a pressure test done,gurgling noise could b air in system try bleeding system r there any bubbles in rad when it gets hot??????test fans by bypassing them with wire hope I av been a help eliminate these issues first

[ahmedali44]

What's mileage?????? Could have blockage in pipes try pressure washer in main pipes

[markysparky]

The mileage is 116000. I've tried bleeding it again today for over an hour and it looked like I'd got all the air out but having tried it again today it's still not right? There's no horrible milky stuff under the oil cap or at the end of the dip stick either :(

[ahmedali44]

Try by removing thermostat @ do fans come on

[markysparky]

The fans come on fine. Also it's just a new thermostat?

I think I need to get both cooling system and head pressure tested?

[steve2006]

The fans come on fine. Also it's just a new thermostat?

I think I need to get both cooling system and head pressure tested?

Probably the best course of action, does the cooling system seem to be over pressurising i.e. does the top radiator hose feel hot and difficult to squeeze?

With no service history you won't know if the water pump has ever been changed which could be a cause.

[markysparky]

Do you mean the hose the comes from the top of the engine into the rad? Next to the filler cap? I'm not sure if it gets pressurised? Should it be?

[ahmedali44]

I think Steve is right that's next step get it pressure tested it could b hairline crack in head or like he said waterpump pipes should b hot if 1 is cold other hot then theirs no water passing through that pipe good luck