Alright...Im lost..Possible BHG?

[koldfire08]

@ 89supra7mgte

Could you give me a better description as to where this water passage is? I am going to inspect that aswell.

Could i possibly try to in/out water lines from the turbo and plug one and blow air into the other to see if there is a leak there or would that not be accurate?

 

[89supra7mgte]

the coolant passage is on the lower plenum. i think it is the line that runs into the bottom of the tb or iscv. trace out the lines and you will find it. should be a total of 3 lines. One that connects tb and iscv, one connects to intake and other is on the block i believe.

If you are gonna try and pressure test it use a proper tester, that attaches to radiator and correctly pressure up the system. air would work but it might not be as consistent due to improper sealing.

 

[koldfire08]

if you have coolant on all plugs, its either a severe bhg or like you stated you are sucking coolant into the intake down into each cylinder. there is the water passage from the head into the front lower area of the intake plenum make sure you do not have a crack there.

if you suspect turbo pull intercooler piping off and see if its wet with coolant. I think if it was the turbo you wouldnt be getting that much coolant into the intake, maybe more moisture than anything. would be alot of coolant to push through bottom of ic and make its way out of the top. check the lower ic pipe as well

all check tb and iscv as to these components have coolant flowing through also

TB as in Throttle Body correct? And icsv as in?
I took off my lower IC pipe from the turbo and it just looks theres only residual on the inner walls, but nothing that seemed to appear like coolant.

Any chance you could possibly pull up an image and circle the water passage in the lower intake plenum, its kinda hard to see down there when your trying to look up something specific.

 

[CajunKenny]

It was a typo. He meant ISC. Idle Speed Controller. You will also see it referred to as an ISCV. Idle Speed Control Valve.

EDIT: Oops. Yours is the typo. Not his. Lol...

 

[koldfire08]

It was a typo. He meant ISC. Idle Speed Controller. You will also see it referred to as an ISCV. Idle Speed Control Valve.

EDIT: Oops. Yours is the typo. Not his. Lol...

Haha, alright, i searched ISCV in AllData but nothing showed up.
Any idea on how easily locate the Water passage 89supra7mgte stated that is in the front lower intake plenum to the head?

Picture referencing covers a 1000 words of description, But then again im thankful to get all the inforamtion you guys are giving me.

 

[CajunKenny]

Here's a link to the ISC info:

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=106

You'll see one of the bypass hoses at the bottom of FI-107

 

[CajunKenny]

Here's another:

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=100

Look at FI-102

 

[koldfire08]

Here's another:

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=100

Look at FI-102

Awesome information, just wish the pictured actually pointed out exactly what hose is which, but then again something is better then nothing.

So theres both of those places where i could be sucking water in, crazzyy!
Now would it be a Seal/Gasket that would go bad? Cracked piece?

what would it take for water to get through those parts?