Something wrong with the cooling system. HELP PLEASE

Jesse18873 · Post by **Jesse18873** » Tue Nov 27, 2007 10:39 pm

On my 2000 leganza, for some reason my heater does not heat up like it should. It just blows warm air. Then the temp gauge stays a little bit under the regular temp. It does not give the cooling fans enough to kick on. Has anyone else experienced this?

Pir0 · Post by **Pir0** » Tue Nov 27, 2007 10:47 pm

Could be a thermostat problem? Or not a problem at all. If you've your blowers on, blowing hot air, it takes the heat from the water in the heater matrix, and actually cools your engine as it's drawing heat away from the water circulating, as far as i know

Spider · Post by **Spider** » Wed Nov 28, 2007 3:13 am

Hey Jesse 18873,
First, your heater should blow hot air ! warm air is a problem. If you have recently flushed and changed coolant in your system ? you could have air pockets in it that need to "bled out"

Now, to verify your true operating water temperature ?
Go to a cooking utensil store and buy a "candy" or "cooking" thermometer. Might cost you all of $3.00 USD
They will read high temps. Don't buy digital, get an old fashioned one.

Remove the cap off the overflow/resevour jug (CAUTION ! COLD ENGINE ONLY) Check the water level (see marks on jug) stick the thermometer in it and fire up your engine.

Leave the cap off and watch the thermometer as your engine warms up for at least 15~20 minutes.

By than the temp should be up to around 180~190 degrees F. Thats about operating temp and will kick on a fan.
If the temperature won't get up past 100 F? Than, as Piro said, you probably do have a stuck open thermostat.

I suppose a sensor could be acting up ?

(I'm old school, younger, more; "sensor knowledgeable" forum members will hopefully elaborate on this)

I don't know about your model woo.
On the Lanos engine the thermostat is sealed inside the housing.
In other words, I can't replace just the thermostat. The thermostat housing and thermostat are a one piece unit...

Check e-Bay for better than dealer prices for this item.
Hope this helps.

Jesse18873 · Post by **Jesse18873** » Fri Nov 30, 2007 10:32 pm

So would flushing out the coolant help the problem??

Spider · Post by **Spider** » Sat Dec 01, 2007 4:59 am

Jesse18873 wrote:So would flushing out the coolant help the problem??

If your cooling system is questionable and you don't know it's history?
And if your engines got lots of mile on it ? It won't hurt it !

It won't cost you a fortune to spring for a new thermostat unit..new hoses (including new heater hoses) a gallon of coolant and
*a gallon of distilled water.
Out with the old in with the new and away you go.. If you still have the problem after that ? At least you will know its not the cooling system, huh ?

*(pour in coolant first, top off w/water.)

Jesse18873 · Post by **Jesse18873** » Thu Jan 17, 2008 2:53 am

Where is the thermostat unit located on a 2000 Leganza??

MMamdouh · Post by **MMamdouh** » Thu Jan 17, 2008 9:13 am

in the thermostate housing

it is the housing on the engine head were a hose comes out of the engine and goes into the top of the radiator

MMamdouh

Pir0 · Post by **Pir0** » Thu Jan 17, 2008 9:26 am

Usually at the left side beside the timing belt cover. As MM said, there's a hose coming from that to the top of the rad on the left hand side. Be VERY careful taking out the bolts. Because there's constant heating up and cooling down, the bolts are alllllllllllways brittle and can snap very very easily.

Jesse18873 · Post by **Jesse18873** » Thu Jan 17, 2008 3:39 pm

On the left side by the timing belt? But is that not where the water pump is located at? Is there a diagram anywhere so that I can look it up?

Pir0 · Post by **Pir0** » Thu Jan 17, 2008 4:44 pm

No the water pump is run BY the timing belt.

The thrmostat simply opens and closes, letting water run through the engine or heater matrix.

This isn't a diagram but it's the only picure I have of my engine bay.

Hope this helps.

Only realised I spelt thermostat wrong, but you get the picture cba changine it

gse_turbo · Post by **gse_turbo** » Thu Jan 17, 2008 5:47 pm

before it's asked... all the thermostats (in these cars/engines) are located in the same spot.

Jesse18873 · Post by **Jesse18873** » Fri Jan 18, 2008 5:09 am

Thanks Pir0! It turns out that the thermostat was defective. What me and my dad decided to do about it was to take out the thermostat from the housing and run the engine like that. Pay day isn't till next week and it's really cold outside.

Pir0 · Post by **Pir0** » Fri Jan 18, 2008 10:04 am

That's how my car's running atm anyway. It still has a thermostat but it's stuck open ><

Engine never warms up, which means I never have any heat in the car lol. Can be bad craic when it's like -4 degrees here in the winter.