DIY: TB coolant line delete. - Lexus IS Forum
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post #1 of 14 (permalink) Old 11-20-2015, 01:20 PM Thread Starter
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DIY: TB coolant line delete.

People has been asking me how i did my tb coolant line delete and the correct line size and adapters they should use so i decided to write a simple DIY post for future references.

Pros:.Cooler throttle body
.easier to remove throttle body since you dont need to wait for the engine to cool down due to the coolant lines attached to the throttle body.
.Also this is very easy so why not.
Cons:
.I guess areas that experience extremely cold weather may suffer from doing this mod because apparently the coolant keeps the throttle body butterfly from freezing up, but i never heard anyone saying that it happened before, just that its a possibility.

Required Materials:
30-60 Mins of labor
3/8" double barb ends
4 hose clamps

Vaper 19345 3/8" Hose Mender - Air Tool Fittings - Amazon.com Vaper 19345 3/8" Hose Mender - Air Tool Fittings - Amazon.com

3ft of 3/8" fuel line

Amazon.com: Allstar Performance (ALL40356)  Fuel Line, 3/8" x 3': Automotive Amazon.com: Allstar Performance (ALL40356) Fuel Line, 3/8" x 3': Automotive

Step 1: Remove throttle body there's DIY in the forums that will show you how to remove the throttle body

Step 2: Remove the two hoses connected to the throttle body.





Step 3: Put the barb adapters into the fuel line and cut the line to the length you want as long as you can connect it to the other port.



Step 4: Make sure everything is clamped down. you dont want this to be leaking on you.



Step 5: enjoy the cooler throttle body and the ease when changing spark plugs.

02 GGP 234k on chassis
BD11A supercharger/dezod headers/greddy catback/bc264/hks cam gear. 285whp 260tq@6000rpm
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post #2 of 14 (permalink) Old 11-21-2015, 04:16 PM
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Quote:
Originally Posted by az989 View Post
People has been asking me how i did my tb coolant line delete and the correct line size and adapters they should use so i decided to write a simple DIY post for future references.



Pros:.Cooler throttle body

.easier to remove throttle body since you dont need to wait for the engine to cool down due to the coolant lines attached to the throttle body.

.Also this is very easy so why not.

Cons:

.I guess areas that experience extremely cold weather may suffer from doing this mod because apparently the coolant keeps the throttle body butterfly from freezing up, but i never heard anyone saying that it happened before, just that its a possibility.



Required Materials:

30-60 Mins of labor

3/8" double barb ends

4 hose clamps



Vaper 19345 3/8" Hose Mender - Air Tool Fittings - Amazon.com



3ft of 3/8" fuel line



Amazon.com: Allstar Performance (ALL40356) Fuel Line, 3/8" x 3': Automotive



Step 1: Remove throttle body there's DIY in the forums that will show you how to remove the throttle body



Step 2: Remove the two hoses connected to the throttle body.











Step 3: Put the barb adapters into the fuel line and cut the line to the length you want as long as you can connect it to the other port.







Step 4: Make sure everything is clamped down. you dont want this to be leaking on you.







Step 5: enjoy the cooler throttle body and the ease when changing spark plugs.

Great write up but your catch can is a fire hazard.


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2002 IS300 GGP
NA for now, going boost
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post #3 of 14 (permalink) Old 11-21-2015, 04:28 PM Thread Starter
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Originally Posted by sulaman58 View Post
Great write up but your catch can is a fire hazard.


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yea needa relocate it somewhere. The catchcan never fills up with oil at all tho.

02 GGP 234k on chassis
BD11A supercharger/dezod headers/greddy catback/bc264/hks cam gear. 285whp 260tq@6000rpm
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post #4 of 14 (permalink) Old 11-22-2015, 07:38 AM
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Quote:
Originally Posted by az989 View Post
yea needa relocate it somewhere. The catchcan never fills up with oil at all tho.

I've never noticed a massive amount of oil come through that line. It's fairly low pressure air. I would hook a catch can up to the one on the other side of the throttle body.

I swapped to a 80mm gs throttle body so I'm running all the vacuum lines to a block>catch can>back to the engine that way I can catch oil coming from any port. The one you have it hooked up to I just have a breather filter on.


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2002 IS300 GGP
NA for now, going boost
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post #5 of 14 (permalink) Old 12-14-2015, 01:02 AM
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great write up man , when there is some free time ill pop the hood and get to it , i live in a hot area already so this will out whenever i wanna clean the throttle etc...

2002 MSM
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post #6 of 14 (permalink) Old 12-14-2015, 09:51 AM
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Quote:
Originally Posted by az989 View Post
People has been asking me how i did my tb coolant line delete and the correct line size and adapters they should use so i decided to write a simple DIY post for future references.

Pros:.Cooler throttle body
.easier to remove throttle body since you dont need to wait for the engine to cool down due to the coolant lines attached to the throttle body.
.Also this is very easy so why not.
Cons:
.I guess areas that experience extremely cold weather may suffer from doing this mod because apparently the coolant keeps the throttle body butterfly from freezing up, but i never heard anyone saying that it happened before, just that its a possibility.
Is the hose then resting on the valve covers? No issues with heat or anything?

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post #7 of 14 (permalink) Old 12-14-2015, 03:28 PM Thread Starter
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Originally Posted by The Nuke View Post
Is the hose then resting on the valve covers? No issues with heat or anything?
the hose is wedged between the TCM and the engine cover mount, in this picture its on the valve cover i dont think it would matter. No issues with heat at all.

02 GGP 234k on chassis
BD11A supercharger/dezod headers/greddy catback/bc264/hks cam gear. 285whp 260tq@6000rpm
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post #8 of 14 (permalink) Old 12-17-2015, 02:58 PM
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Quote:
Originally Posted by sulaman58 View Post
I've never noticed a massive amount of oil come through that line. It's fairly low pressure air. I would hook a catch can up to the one on the other side of the throttle body.

I swapped to a 80mm gs throttle body so I'm running all the vacuum lines to a block>catch can>back to the engine that way I can catch oil coming from any port. The one you have it hooked up to I just have a breather filter on.


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gs400???
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post #9 of 14 (permalink) Old 12-18-2015, 09:24 AM
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Originally Posted by Gengles View Post
gs400???

yah gs400 throttle body

2002 IS300 GGP
NA for now, going boost
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post #10 of 14 (permalink) Old 02-01-2016, 04:25 PM
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Did you plug the holes on the throttle body where the coolant went to before or are they just left open?
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post #11 of 14 (permalink) Old 02-01-2016, 06:47 PM
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Originally Posted by allturbo98 View Post
Did you plug the holes on the throttle body where the coolant went to before or are they just left open?

I just left it open.


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post #12 of 14 (permalink) Old 08-08-2016, 03:14 PM
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I did this a couple of months ago and seems to running fine with no problems. Great and easy mod.
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post #13 of 14 (permalink) Old 01-22-2017, 02:22 PM
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I might be doing this. I think mine TB ic clogged. Whenever I blow air from one end, it doesn't come out the other end. I was wondering if it will effect anything but obviously not. Thank you
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post #14 of 14 (permalink) Old 01-22-2017, 04:00 PM
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Ok since this is a throttle body thread, has there been a TB spacer made yet for our cars? If your looking to squeeze every lil bit of performance off the TB, I feel this would help. Anyone know about a spacer?
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