I’m not a mechanic, I’m bad at it…to help me get through it, I usually try to make basic easy to follow instructions using videos and threads (and ai now).
This is like a diy tutorial for a very inexperienced car repair person, detailing the tool I used to handle each difficulty…
My 2011 lx570 w around 106k miles developed a hairline crack in the spot they normally do…even though I had a jb weld radiator patch on that spot to strengthen it.
I don’t know whether the patch helped or not because I put it on when there was a witness mark, but no leak 4-5 years and 20k miles ago…the leak occurred while towing a small trailer for 2-3 hrs one day..:and it only leaked 6-8 oz of coolant before I noticed…so maybe the preemptive patch kept me from having a more catastrophic leak…or maybe it extended the life of the radiator somewhat.
some part numbers and tool sizes might be slightly off. I got mixed info early on and have had to edit my own notes. Will attempt to make sure I don’t miss anything/get stuff wrong.
Radiator:
16400-50384
Radiator $306 historically
16400-50384 Genuine Toyota Radiator Assembly - https://www.toyotapartsdeal.com/oem/toyota~radiator~assy~16400-50384.html
Prices now
280-320
Upper and lower radiator hose
Upper Radiator Hose: 16571-38080 ($23)
Lower Radiator Hose: 16572-38131 ($30.33)
Thermostat:
16031-38010 (this is confusing…you can buy this part from some Toyota websites but not others because they’re starting to only sell it as part of an assembly for like 30 dollars more…the larger assembly part number supersedes this one. You can buy this individual thermostat as an aisen (likely oem w no oem warranty) part alone on Amazon for around 30)
Total $360 shipped from central Florida Toyota 3/2/25
4.4 gallons of coolant. Previously I used
-PEAK OET Extended Life Red/Pink Concentrate Antifreeze/Coolant for Asian Vehicles, 1 Gal for $25 makes 2 gallons…likely need to purchase 2+ gallons plus distilled water.
1. Radiator Replacement DIY (IH8MUD Forum)
forum.ih8mud.com
Another radiator crack/what should I replace thread - https://forum.ih8mud.com/threads/another-radiator-crack-what-should-i-replace-thread.1325598/
2. 2009 LX570 Radiator Replacement (YouTube)
3. Land Cruiser 200 Series or LX570 Radiator Replacement (YouTube)
This is the seemingly more sophisticated mechanic…seems like a good video.
Ai tutorial via prompt:
Use diy and tutorial and instruction threads from ih8mud to make me a tutorial for replacing the radiator and all reasonable other items that you would generally replace during the same repair
This guide consolidates information from IH8MUD threads and related resources to provide a step-by-step tutorial for replacing the radiator on a 2011 Lexus LX570. It also includes recommendations for replacing related components during the process.
This is like a diy tutorial for a very inexperienced car repair person, detailing the tool I used to handle each difficulty…
My 2011 lx570 w around 106k miles developed a hairline crack in the spot they normally do…even though I had a jb weld radiator patch on that spot to strengthen it.
I don’t know whether the patch helped or not because I put it on when there was a witness mark, but no leak 4-5 years and 20k miles ago…the leak occurred while towing a small trailer for 2-3 hrs one day..:and it only leaked 6-8 oz of coolant before I noticed…so maybe the preemptive patch kept me from having a more catastrophic leak…or maybe it extended the life of the radiator somewhat.
some part numbers and tool sizes might be slightly off. I got mixed info early on and have had to edit my own notes. Will attempt to make sure I don’t miss anything/get stuff wrong.
Radiator:
16400-50384
Radiator $306 historically
16400-50384 Genuine Toyota Radiator Assembly - https://www.toyotapartsdeal.com/oem/toyota~radiator~assy~16400-50384.html
Prices now
280-320
Upper and lower radiator hose
Upper Radiator Hose: 16571-38080 ($23)
Lower Radiator Hose: 16572-38131 ($30.33)
Thermostat:
16031-38010 (this is confusing…you can buy this part from some Toyota websites but not others because they’re starting to only sell it as part of an assembly for like 30 dollars more…the larger assembly part number supersedes this one. You can buy this individual thermostat as an aisen (likely oem w no oem warranty) part alone on Amazon for around 30)
Total $360 shipped from central Florida Toyota 3/2/25
4.4 gallons of coolant. Previously I used
-PEAK OET Extended Life Red/Pink Concentrate Antifreeze/Coolant for Asian Vehicles, 1 Gal for $25 makes 2 gallons…likely need to purchase 2+ gallons plus distilled water.
1. Radiator Replacement DIY (IH8MUD Forum)

Radiator Replacement DIY
Before I do this- is a radiator replacement DIY needed? I couldn't find one but maybe I wasn't looking hard enough. I'd say this job was a 5/10, kinda a pain to figure out how to do it but I did it without removing the fan or shroud. Radiator was as of today 460 bucks or so with tax from the...

Another radiator crack/what should I replace thread - https://forum.ih8mud.com/threads/another-radiator-crack-what-should-i-replace-thread.1325598/
2. 2009 LX570 Radiator Replacement (YouTube)
3. Land Cruiser 200 Series or LX570 Radiator Replacement (YouTube)
This is the seemingly more sophisticated mechanic…seems like a good video.
Ai tutorial via prompt:
Use diy and tutorial and instruction threads from ih8mud to make me a tutorial for replacing the radiator and all reasonable other items that you would generally replace during the same repair
This guide consolidates information from IH8MUD threads and related resources to provide a step-by-step tutorial for replacing the radiator on a 2011 Lexus LX570. It also includes recommendations for replacing related components during the process.
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