TB coolant bypass on gs300
#1
Lexus Champion
Thread Starter
iTrader: (1)
Join Date: Jan 2003
Location: Texas
Posts: 3,353
Likes: 0
Received 0 Likes
on
0 Posts
TB coolant bypass on gs300
i tried searching the forums since the sc3 and 1st gen GS are both 2jz but i cant seem to find any threads....i went over to supraforums but i cant even register (admins disabled it) so can anyone help me out ? i live in houston wheres its always hot so im not worreid about the butterfly freezing over.
#2
Lexus Champion
I didnt do it to mine but here's how.
All you gotta do is find the two coolent lines going in and out of the Throttle Body.
Use a connector to connect those two lines togeter, and get a plug to plug up the coolant holes on the throttle body.
Here's the diy from bananags's site. Same concept for the GS300
http://lexusmodz.netfirms.com/GS_DIY/coolant_bypass
All you gotta do is find the two coolent lines going in and out of the Throttle Body.
Use a connector to connect those two lines togeter, and get a plug to plug up the coolant holes on the throttle body.
Here's the diy from bananags's site. Same concept for the GS300
http://lexusmodz.netfirms.com/GS_DIY/coolant_bypass
#6
Lexus Champion
Trending Topics
#8
Lexus Champion
Thread Starter
iTrader: (1)
Join Date: Jan 2003
Location: Texas
Posts: 3,353
Likes: 0
Received 0 Likes
on
0 Posts
DIY: TB bypass on GS300 (2jz-ge)
disclaimer and FIY and what else i feel like saying!!!
it cost me less than 10bucks to do everything, and it would have taken me 30-45mins to complete this mod if i had all the correct parts to begin with... in MY setup i used a 3/8 hose and 3/8 to 3/8 connectors which is a lot hard to connect to the oem hose because of that little 1/16 of a size difference. the correct OEM size is 5/16 so recommend using 5/16 hosing and hose connectors. cheers
i really dont know how much HP i gained by doign this...but i do know that installing new TM spark plugs + collant bypass + cleaning TB made my car feel much better maybe faster?!? when i touched the new bypass hosing after i drove it for maybe 15mins the hose was extremely HOT, i can only imagine how HOT the air was before i did this bypass.
MAKE SURE YOUR CAR IS COLD/COOL NOT HOT!!!!! you will loose a lot of coolant and possibly burn yourself if do otherwise
parts:
(1) 5/16 reinforced hoses (approx 14inches)
(2) 5/16 to 5/16 hose connectors
(2-4) hose clamps, depending if you want to use old hose clamps
(2) 5/16 bypass caps
10mm socket
12mm socket
pliers, to remove all the hose clamps.
carb cleaner (o2 sensor safe!!!)
first remove the intake tubing by removing all the things i circled green
once the tubing is off you will see this side of the TB... there is a total of 8 screws that you
need to remove in this pix, this is the top side of the TB:
bottom side: i circled 2 spots where the other 2 bolts are, AND the green circle you'll have to remove the BOLT AND SCREW as well.. to remove the screw just use i believe a 5mm socket for it.
once you remove all the bolts and wire connections, remove the throttle cable by pushing the throttle like accelerating etc (you'll figure it out)... also loosen the mount that adjusts the throttle cables position. to do so loosen the right side only because the left side will adjust the tension... now remove the cable completely off the TB
(before you do this step loosen radiator cap to relieve any pressure in the hoses)
pull the TB towards the pass side a little to give you slack now remove the coolant hose on the front side of the TB first... once u remove it you can physically flip the TB upward and get to the rear one alot easier ... remove the rear one and you should have an engine bay like so...
the red circle to the right mid section is the first hose your should remove, followed by the one thats the furthest left in the pic
Last edited by joshoowa; 09-30-05 at 09:25 AM.
#9
Lexus Champion
Thread Starter
iTrader: (1)
Join Date: Jan 2003
Location: Texas
Posts: 3,353
Likes: 0
Received 0 Likes
on
0 Posts
now that the TB is off the engine use the bypass caps and cap the TB like so:
since the TB is off teh car you might as well clean it with a little carb cleaner and napkins etc.... heres some bling bling pictures!
since the TB is off teh car you might as well clean it with a little carb cleaner and napkins etc.... heres some bling bling pictures!
Last edited by joshoowa; 08-23-05 at 11:13 PM.
#10
Lexus Champion
Thread Starter
iTrader: (1)
Join Date: Jan 2003
Location: Texas
Posts: 3,353
Likes: 0
Received 0 Likes
on
0 Posts
now just hook up the new hose and run it in front of the TB then down along hte left side of it...
sorry guys i dont have actual pix of how i ran the hoose, but heres a diagram.... i know the way i ran it is ghetto but i was in a hurry to get my car all back together. i'll eventually make it hidden but for now bite me
finally, just reinstall everything and your done!
sorry guys i dont have actual pix of how i ran the hoose, but heres a diagram.... i know the way i ran it is ghetto but i was in a hurry to get my car all back together. i'll eventually make it hidden but for now bite me
finally, just reinstall everything and your done!
Last edited by joshoowa; 08-23-05 at 11:01 PM.
#14
Lexus Champion
Thread Starter
iTrader: (1)
Join Date: Jan 2003
Location: Texas
Posts: 3,353
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by mikal
i see you finally got that taken care of
nice write up .. did you notice any difference?
nice write up .. did you notice any difference?
Originally Posted by PHML
thanks for the detailed pics and writeup...plz followup with final hose route pics and writeup.
Pete
Pete
1, protect the hose from hot engine block
2, keep the heat from coolant inside the hose which will negligibly reduce heat in the engine bay.
Last edited by joshoowa; 08-24-05 at 09:57 AM.