Air/coolant lines

sugarfree · 10-25-2009, 04:36 PM

Can someone help me distinguish which line is the air and coolant that connects to the idle control valve?

This idiot hooked up the wrong hoses the valve and coolant started coming out of my headers and intake manifold. Then he switched them around and coolant wasnt coming out of the headers anymore, but the car choked and died after a little gas. After the motor stopped coolant came out of the intake pipe. Could it be just left over coolant because it didnt come out of the headers anymore after he switched the lines around. Freaking idiot man...

MANDALAY · 10-25-2009, 10:35 PM

WTF.Whats his name Moe from the 3 stooges ? Get on TOYDIY and you will see the necessary diagrams. Shapes of the hoses are spot on.

sugarfree · 10-25-2009, 10:39 PM

Roman · 10-25-2009, 11:25 PM

Oh god! That's terrible.

Personally, I would reccomend that unless you live in the snow or something, just leave the throttle body heated coolant lines disconnected.

They are there to stop the throttle body from icing up, which can happen at low throttle positions when there is a large pressure drop from one side to the other, like how an LPG bottle gets icy when it's about to run out.

This is worst case scenario though, I've always disconnected mine and I live in cold and miserable New Zealand, and never had a problem.

People go to all of the trouble of having a cold air intake, and then have an 80 degree celcius throttle body and intake manifold, doesnt make much sense!

also, I'd reccomend an oil change, now that you've most likely got coolant all through it.

Would also reccomend killing who ever did this to your engine!

sugarfree · 10-26-2009, 02:49 PM

Yeah i drained the oil, it sure did mix with water, what a waste.

I would like to get the coolant lines to work like it did originially bc when i first started the motor it was fine, BUT it was idleing at 3k. So we cleaned out the idle control valve and it fixed the idle but the guy put the wrong hose in and it started flooding. The motor still starts and sounds healthy, bc we checked on it a couple more times. But right now i took off the intake manifold, the spark plugs and drained the oil/filter.

Could the problem be coming from anything else besides that line?

nikk1877 · 10-27-2009, 11:30 AM

I lol'd.

I hope you get everything sorted out and all that but it was a funny story.

sugarfree · 11-02-2009, 02:40 PM

Previously i had a friend clean out the idle control valve. I asked Mandalay (and i appreciate his help lots) for the part number and it is very much expensive.

Well the motor keeps flooding with water because of the valve, maybe its broken or something messed up when my friend cleaned it. I disconnected the coolant lines, plugged up the lines, and started right up. Sounds healthy, and no water.

So is it possible to maybe "fix" the idle control valve so that it doesnt flood my engine with water? Im not exactly sure how it works, but i read someone elses thread on how it works but the setup was for ITB. All i know is coolant circulates through this valve controlling idle with heated coolant.

Thanks.

Roman · 11-02-2009, 03:37 PM

When you take off the idle speed control valve, there are three seperate compartments.

Two have air flowing between them, with the little valve in between which regulates the volume of air passing through.

The third one is a completely seperate compartment in the ISCV and throttle body that fills with coolant.

If when you connect the coolant lines up, it leaks coolant into the throttle body, then you must have some leaking or perished gaskets, which normally seperate these areas. This could also cause a poor idle when the lines are looped off, as you will effectively have a vaccum leak, air that hasnt been 'read' by the airflow meter will possibly be getting into the throttle body.

Also just looking at the Toyodiy website, I just realised that there's actually a thermostat in the throttle body for those coolant lines.

I guess it must only flow coolant through there when it is especially cold, rather than heating it up all of the time.

I was the one who had the ISCV hooked up for quad throttle setup, and I machined through to the third compartment, so that I could use the coolant pipe as the air feed.

Roman · 11-02-2009, 03:46 PM

Yeah so just thinking about it... Doesnt matter which way around the lines go to those two pipes, if it leaked one way around and not the other, it would have been because the thermostat in the throttle body was inhibiting the flow, but still would have been a problem.

Only possible cause of the problem is that the gasket is missing, or not sealing properly.

I'd pull the throttle body back off and take the ISCV off again, and give it a decent look over. Might require a new gasket, or you might find that the old one was accidentally left out or something. Could also possibly be the throttle body thermostat O rings perished or left out or something.

sugarfree · 11-02-2009, 06:28 PM

Awsome, this makes sense, we did change an O ring gasket, but we couldnt find an exact fit because the dealer was closed. So i replaced it with a AC one, it LOOKED sealed but i guess not.

BTW what car/motor are you looking at on TOYDIY?

Roman · 11-02-2009, 07:12 PM

This one

ToyoDIY.com

10-25-2009, 04:36 PM	#1 (permalink)
sugarfree No Skills Join Date: May 2007 Posts: 34 Thanks: 8 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Air/coolant lines Can someone help me distinguish which line is the air and coolant that connects to the idle control valve? This idiot hooked up the wrong hoses the valve and coolant started coming out of my headers and intake manifold. Then he switched them around and coolant wasnt coming out of the headers anymore, but the car choked and died after a little gas. After the motor stopped coolant came out of the intake pipe. Could it be just left over coolant because it didnt come out of the headers anymore after he switched the lines around. Freaking idiot man...

10-25-2009, 10:39 PM	#3 (permalink)
sugarfree No Skills Join Date: May 2007 Posts: 34 Thanks: 8 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	LOL!

11-02-2009, 03:37 PM	#8 (permalink)
Roman Beams OCD Support Group Join Date: Feb 2006 Location: Auckland, NZ Posts: 713 Thanks: 23 Thanked 49 Times in 30 Posts My Google Map iTrader Rating: (2/100% )	When you take off the idle speed control valve, there are three seperate compartments. Two have air flowing between them, with the little valve in between which regulates the volume of air passing through. The third one is a completely seperate compartment in the ISCV and throttle body that fills with coolant. If when you connect the coolant lines up, it leaks coolant into the throttle body, then you must have some leaking or perished gaskets, which normally seperate these areas. This could also cause a poor idle when the lines are looped off, as you will effectively have a vaccum leak, air that hasnt been 'read' by the airflow meter will possibly be getting into the throttle body. Also just looking at the Toyodiy website, I just realised that there's actually a thermostat in the throttle body for those coolant lines. I guess it must only flow coolant through there when it is especially cold, rather than heating it up all of the time. I was the one who had the ISCV hooked up for quad throttle setup, and I machined through to the third compartment, so that I could use the coolant pipe as the air feed. Last edited by Roman; 11-02-2009 at 03:43 PM.

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10-25-2009, 10:35 PM	#2 (permalink)
MANDALAY Beams Owners Group Join Date: Feb 2007 Location: victoria AUSTRALIA Posts: 1,839 Thanks: 88 Thanked 64 Times in 60 Posts My Google Map iTrader Rating: (4/100% )	WTF.Whats his name Moe from the 3 stooges ? Get on TOYDIY and you will see the necessary diagrams. Shapes of the hoses are spot on.

10-25-2009, 11:25 PM	#4 (permalink)
Roman Beams OCD Support Group Join Date: Feb 2006 Location: Auckland, NZ Posts: 713 Thanks: 23 Thanked 49 Times in 30 Posts My Google Map iTrader Rating: (2/100% )	Oh god! That's terrible. Personally, I would reccomend that unless you live in the snow or something, just leave the throttle body heated coolant lines disconnected. They are there to stop the throttle body from icing up, which can happen at low throttle positions when there is a large pressure drop from one side to the other, like how an LPG bottle gets icy when it's about to run out. This is worst case scenario though, I've always disconnected mine and I live in cold and miserable New Zealand, and never had a problem. People go to all of the trouble of having a cold air intake, and then have an 80 degree celcius throttle body and intake manifold, doesnt make much sense! also, I'd reccomend an oil change, now that you've most likely got coolant all through it. Would also reccomend killing who ever did this to your engine!

10-26-2009, 02:49 PM	#5 (permalink)
sugarfree No Skills Join Date: May 2007 Posts: 34 Thanks: 8 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Yeah i drained the oil, it sure did mix with water, what a waste. I would like to get the coolant lines to work like it did originially bc when i first started the motor it was fine, BUT it was idleing at 3k. So we cleaned out the idle control valve and it fixed the idle but the guy put the wrong hose in and it started flooding. The motor still starts and sounds healthy, bc we checked on it a couple more times. But right now i took off the intake manifold, the spark plugs and drained the oil/filter. Could the problem be coming from anything else besides that line?

10-27-2009, 11:30 AM	#6 (permalink)
nikk1877 Beams Owners Group Join Date: Oct 2006 Location: Scotland Posts: 93 Thanks: 5 Thanked 5 Times in 3 Posts iTrader Rating: (0/0% )	I lol'd. I hope you get everything sorted out and all that but it was a funny story.

11-02-2009, 02:40 PM	#7 (permalink)
sugarfree No Skills Join Date: May 2007 Posts: 34 Thanks: 8 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Previously i had a friend clean out the idle control valve. I asked Mandalay (and i appreciate his help lots) for the part number and it is very much expensive. Well the motor keeps flooding with water because of the valve, maybe its broken or something messed up when my friend cleaned it. I disconnected the coolant lines, plugged up the lines, and started right up. Sounds healthy, and no water. So is it possible to maybe "fix" the idle control valve so that it doesnt flood my engine with water? Im not exactly sure how it works, but i read someone elses thread on how it works but the setup was for ITB. All i know is coolant circulates through this valve controlling idle with heated coolant. Thanks.

11-02-2009, 03:46 PM	#9 (permalink)
Roman Beams OCD Support Group Join Date: Feb 2006 Location: Auckland, NZ Posts: 713 Thanks: 23 Thanked 49 Times in 30 Posts My Google Map iTrader Rating: (2/100% )	Yeah so just thinking about it... Doesnt matter which way around the lines go to those two pipes, if it leaked one way around and not the other, it would have been because the thermostat in the throttle body was inhibiting the flow, but still would have been a problem. Only possible cause of the problem is that the gasket is missing, or not sealing properly. I'd pull the throttle body back off and take the ISCV off again, and give it a decent look over. Might require a new gasket, or you might find that the old one was accidentally left out or something. Could also possibly be the throttle body thermostat O rings perished or left out or something.

11-02-2009, 06:28 PM	#10 (permalink)
sugarfree No Skills Join Date: May 2007 Posts: 34 Thanks: 8 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Awsome, this makes sense, we did change an O ring gasket, but we couldnt find an exact fit because the dealer was closed. So i replaced it with a AC one, it LOOKED sealed but i guess not. BTW what car/motor are you looking at on TOYDIY?

11-02-2009, 07:12 PM	#11 (permalink)
Roman Beams OCD Support Group Join Date: Feb 2006 Location: Auckland, NZ Posts: 713 Thanks: 23 Thanked 49 Times in 30 Posts My Google Map iTrader Rating: (2/100% )	This one ToyoDIY.com