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GS - 2nd Gen (1998-2005) Discussion about the second generation GS300, GS400 and GS430 (1998 - 2005)

radiator replacement

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Old May 25, 2011 | 04:26 PM
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Default radiator replacement

i just want to make sure theres nothing different from a lexus to any other car.

i have a 5in hair line crack on top of my radiator...i have a new one seating in the roon right now..

question is.

its just like any other radiator right? drain, unbolt, pull out (giggty,giggty lol) swap fans over, install new rad, hookup and fill ur done..

hope i worded it all right i typing from my cell
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Old May 25, 2011 | 04:46 PM
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yes; then flush with distilled water and refill.
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Old May 25, 2011 | 11:32 PM
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then start the engine (do not drive the car) with radiator cap off to circulate coolant and fill the radiator till all the air pockets are gone. Make sure to use toyota "red" 50/50 coolant if possible. Make sure to use new radiator cap if needed (do not use made in china). Check hose, might be a good time to replace them as well. Fill the reservoir to full. Close everything, make sure everything is tight and no leaks, then you're done. Good luck.
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Old May 26, 2011 | 02:40 PM
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lol thanks guys for the info and help, ill be hopefully doin it tomo since im off
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Old May 26, 2011 | 04:15 PM
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Sometimes if you can park on a slight incline (nose up) it will help raise the air pockets up to the radiator faster. And since the gs does have a liquid cooled (preheated rather) throttle body, there are lines above the height of the radiator cap. And air pushes to the top of the system, so recheck your radiator level for the first few days after the swap and keep topping it off, letting it idle some with the cap off.

Pretty easy task on the gs as there is plenty of room between the motor and the radiator to work.
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Old May 26, 2011 | 04:27 PM
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Also turn on the heater to full temp but with the fan at the lowest setting. There will be some coolant in the heater core.
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Old May 26, 2011 | 04:47 PM
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I believe the 2GS radiators also have the ATF built in them as well
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Old May 26, 2011 | 05:03 PM
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Originally Posted by GSteg
Also turn on the heater to full temp but with the fan at the lowest setting. There will be some coolant in the heater core.
For sure..

Originally Posted by YaKuZa_GS
I believe the 2GS radiators also have the ATF built in them as well
Yep. It pumps around and back to the pan, kinda like the oil in the motor does. So it will work it's own air pockets out, but defiantly need to replace the atf lost from pulling the rad. Just run it and check the tranny dip stick as well for the first couple days and top off as needed.
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Old May 26, 2011 | 08:46 PM
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ooh thanks i wud never have thought of the atf..ok cool thanks for that tip too..

i jus had a question..

if ur standing in front looking into the engine bay, to the right theres aline or hose that gose to a fuse box which is connected to the radaitor..what is that?..bc the radiator i have it dosent have any extra hole for what im looking about..
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Old May 26, 2011 | 09:31 PM
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cools the ecu....
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Old May 27, 2011 | 12:26 AM
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Just wondering where did you get the radiator from? Mines starting to crack near the radiator cap, but hasnt fully cracked.. just hoping it wont for a while..
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Old May 27, 2011 | 09:14 AM
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You can find a Koyo radiator on eBay for around $150 or so. They're good OEM replacement and fitment is right one. I wouldn't settle for anything less.
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Old May 27, 2011 | 09:31 AM
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Originally Posted by GS400onDUB
Just wondering where did you get the radiator from? Mines starting to crack near the radiator cap, but hasnt fully cracked.. just hoping it wont for a while..
I bought mine at a local store here in Sacramento area. Here's the link: http://www.go-part.com/9805-lexus-gs...2-p-23510.html. Its made by Koyo and fits like OEM. If you happen to be near the area, you can do local pickup and even ask for a discount. Ask them if they can pricematch ebay's price (they did for me and got it $10 cheaper). Mine works great and still looks new. Been a couple of years now and no issue. Good luck!
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Old May 27, 2011 | 10:07 AM
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Originally Posted by GS400onDUB
Just wondering where did you get the radiator from? Mines starting to crack near the radiator cap, but hasnt fully cracked.. just hoping it wont for a while..

this is where i got mine..got it like in 3 days
auto parts ware house..108[/url] bux shipped and i got it in 3 days

^^^thats all one word .com..for some reason it kept on puting stars when i hit save

Last edited by blk98gs; May 27, 2011 at 10:12 AM.
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Old May 27, 2011 | 10:18 AM
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Thanks guys, the price isnt so bad i thought it would cost more. Ill have to do this soon before it gets too hot.
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