WINDSCREEN CONDENSATION

Submitted: Friday, Mar 18, 2005 at 19:21
ThreadID: 21332 Views:1930 Replies:6 FollowUps:10
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I have a TLC 100 series Turbo intercooled which when I have the air on external and no aircon on I get condensation on the inside of my windscreen.

This isnt the 'normal' condensation that you would get when warm moist air hits the cold windscreen. This is definitely steam laden air that is coming through the system. In he right light I can even see te 'steam' swirling out of the vents

I am about to drop it into garage for them to check it out and it's 100% that it will be a leaking/split/faulty hose either from the aircon or from the intercooler or from the radiator.

To help me 'get to the root cause quicker' can anyone suggest the most likely surce?
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Reply By: muzzimbidgie - Friday, Mar 18, 2005 at 19:40

Friday, Mar 18, 2005 at 19:40
Won't be aicon,intercooler or radiator. A leaking intercooler would be under pressure and you would be able to hear it & would possibly smell of oil. Radiator will smell of coolant and aircon will smell of refridgerant gas.

Try the windsceen wiper bottle.
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Follow Up By: KiwiAngler - Friday, Mar 18, 2005 at 20:35

Friday, Mar 18, 2005 at 20:35
what do you mean 'try the windscreen bottle'?
How does water from the water bottle become steam inside my vehicle?
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Follow Up By: Shaker - Friday, Mar 18, 2005 at 23:34

Friday, Mar 18, 2005 at 23:34
Quote: "A leaking intercooler would be under pressure and you would be able to hear it & would possibly smell of oil."

What pressure is in an intercooler, & why would it smell of oil?
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Follow Up By: Member - muzzgit - Saturday, Mar 19, 2005 at 01:29

Saturday, Mar 19, 2005 at 01:29
Turbo's quite often pump small amounts of oil through the motor. It's no biggie, happens all the time.
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Follow Up By: Shaker - Saturday, Mar 19, 2005 at 19:54

Saturday, Mar 19, 2005 at 19:54
But ....... the intercooler only cools intake air! Turbos boost the exhaust?
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Follow Up By: Member - Hugh (WA) - Saturday, Mar 19, 2005 at 23:16

Saturday, Mar 19, 2005 at 23:16
Your a bit of the mark Shaker,

Turbo's work as follows: The exhaust gas drives a turbine, which is connected via shaft in turbo housing to a compressor that boosts the pressure of the intake air. The act of compressing the air (boosting press) raises air temp. The intercooler then cools the pressurised air before going into the engine. So the air going through the intercooler (and into the engine) is greater than atmospheric pressure.

Regards,
Hugh
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Reply By: Redback - Friday, Mar 18, 2005 at 20:30

Friday, Mar 18, 2005 at 20:30
Windscreen has a leak somewhere, do you have mozzies too.
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Follow Up By: KiwiAngler - Friday, Mar 18, 2005 at 20:35

Friday, Mar 18, 2005 at 20:35
Nope and nope
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Reply By: muzzimbidgie - Friday, Mar 18, 2005 at 20:52

Friday, Mar 18, 2005 at 20:52
Indeed !!

How would water condensation come from the intercooler or the airconditioner ?

Maybe the windscreen washers are leaking and the water is getting hot off the engine.

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Follow Up By: Member - muzzgit - Saturday, Mar 19, 2005 at 01:25

Saturday, Mar 19, 2005 at 01:25
An intercooler is under pressure because the turbo boost goes through the intercooler before going into the motor.

OR

The intercooler is under pressure because turbochargers create pressure and the intercooler is connected to the turbocharger.

OR

Lift the bonnet of an intercooled car, take off the hose that goes into the intake manifold, rev the engine and see if it doesn't blow your hair back !

DOH !!
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Follow Up By: Bonz (Vic) - Saturday, Mar 19, 2005 at 08:58

Saturday, Mar 19, 2005 at 08:58
hmmmm some LUCKY people *have* hair to blow back!
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Reply By: Peter 2 - Friday, Mar 18, 2005 at 21:03

Friday, Mar 18, 2005 at 21:03
You may find that it is the very cold dry air from the a/c system hitting the moist air in the car. This will happen in very humid weather especially when it is warmish.
It does look like steam but is just very 'wet' air from the a/c, nothing to be alarmed about quite normal, will stop when the a/c has dried the air in the car.
It can look like steam streaming out of the vents.
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Follow Up By: KiwiAngler - Friday, Mar 18, 2005 at 23:49

Friday, Mar 18, 2005 at 23:49
Peter

Thanks for the reply but if you read my post I specified that the aircon was turned off.

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Follow Up By: theshadows - Saturday, Mar 19, 2005 at 07:50

Saturday, Mar 19, 2005 at 07:50
what peter is saying is turn on the air till it dehumidifies the air !!!
your problem will go away.

shadow
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Reply By: Member - Mozza (NSW) - Saturday, Mar 19, 2005 at 10:34

Saturday, Mar 19, 2005 at 10:34
i suggest giving your windscreen a good clean - especially on the inside with a window cleaner product.. don't just wipe over it with a cloth. do it properly..
my windscreen kept smoggin up all the time.. and then i realised it was because the damn thing wasn't clean...!.. i guess it's just the way cold V's hot air works against a cold/hot glass!
AnswerID: 103059

Reply By: nickoff - Saturday, Mar 19, 2005 at 15:11

Saturday, Mar 19, 2005 at 15:11
Where is the airflow selector set to, Windscreen, cabin, feet or feet and cabin.
does this "visible steam" aslo come from the other vents when selected, or just the windscreen only.

I find with my hilux ute, I can get a cooling effect from the a/c without the compressor being turned over by the motor. Not knowing how it works, but while moving forward, with fresh air seleceted, the air from the vents is way cooler than the air inside or outside the vehicle.

Nick.
AnswerID: 103080

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