water lines on ct9

kieran.s gt

Member +
are the two water lines the same on the turbo does it matter what way they go on \
forgotten which one goes where
thanks in advance
 

Jay

Admin
It won't make a difference although it is important to ensure both pipes are securely fitted and unkinked.

BTW Ben is right with where each one goes. :)

Hope that helps.

Jay
 

dantheman

Member +
yeah the water only runs through the turbo and back out into the engine so can go on either way, or loop the pipe and not run water feed to turbo
(unless its rollerbearing then it is essential to run water feed) :)
 

dac69er

Super Moderator
yeah the water only runs through the turbo and back out into the engine so can go on either way, or loop the pipe and not run water feed to turbo
(unless its rollerbearing then it is essential to run water feed) :)

and why would you do that?
 

dantheman

Member +
because the water feed doesnt make alot of difference... most turbos wernt water cooled until saabs started using it and then it came standard on most cars. the oil inside the turbo will cool it better than the water will, however on a rollerbearing turbo you must run water feed as they have built in oil restrictors so will have less oil in the core at any given time than a journal bearing turbo would
 

dac69er

Super Moderator
because the water feed doesnt make alot of difference... most turbos wernt water cooled until saabs started using it and then it came standard on most cars. the oil inside the turbo will cool it better than the water will, however on a rollerbearing turbo you must run water feed as they have built in oil restrictors so will have less oil in the core at any given time than a journal bearing turbo would

the reason for the water cooling is to reduce the need to keep the car running to 'cool the turbo down' its there for a reason and it obviously does something otherwise toyota wouldnt bother with it.
 

dantheman

Member +
no its not, when you switch off a hot engine heat soak begins. This means that the heat in the head, exhaust manifold, and turbine housing finds it way to the turbo center housing, raising its temperature.these extreme temperatures in the center housing can result in oil coking.

To minimize the effects of heat soak water-cooled center housings were introduced. They use coolant from the engine to act as a heat sink after engine shutdown, preventing the oil from coking in the core :)

running without coolent feed will argubly shorten the life of the turbo, but by how much who knows?

ive run loads of turbos without water feed with no probs
 

dac69er

Super Moderator
no its not, when you switch off a hot engine heat soak begins. This means that the heat in the head, exhaust manifold, and turbine housing finds it way to the turbo center housing, raising its temperature.these extreme temperatures in the center housing can result in oil coking.

To minimize the effects of heat soak water-cooled center housings were introduced. They use coolant from the engine to act as a heat sink after engine shutdown, preventing the oil from coking in the core :)

running without coolent feed will argubly shorten the life of the turbo, but by how much who knows?

ive run loads of turbos without water feed with no probs


so you said no its not, then (in effect) just agreed with what i just said???

like i said. no point in just looping the coolant lines together for no reason. if you have no coolant lines, then thats a different matter, but for the sake of fitting 2 pipes back on its not worth removing.
 

dantheman

Member +
no you've said the water cooling is to reduce the need to keep the car running to 'cool the turbo down', the reason you let the car idle for a while after a hard run is to allow the turbo to slow down before switching off the engine and cutting of its oil supply.. the water is just there to help it cool down quicker when switching off as the core ofthe turbo get very hot being between the head and downpipe.

all im saying is you can run it without water with no probs, however its better to run with water as it will be better for the turbo in the long run


the reason for the water cooling is to reduce the need to keep the car running to 'cool the turbo down' its there for a reason and it obviously does something otherwise toyota wouldnt bother with it.
 
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dac69er

Super Moderator
i said 'reduces' the need. and on a car that just has oil cooling you keep it running for a bit too cool it down (original reason for a turbo timer), if it has water cooling this is not so much of an issue.

unless you literally stop and turn the car off straight after boosting then its not going to be spinning any quicker than if you let it idle for 30 seconds.
 
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