Radiator Differences
#46
@xdejablu3x if it's not the small outlet neck cracked that goes to the reservoir hose.. Then for sure the top seal / gasket blew just like mine...
What are you other MODS if any?
My original 08 went out on me at 100k miles ish
Joe Z
What are you other MODS if any?
My original 08 went out on me at 100k miles ish
Joe Z
#47
Well I joined the failed radiator crew today lol.
2011 at 80k miles and a week (to the day) since installing headers.
Besides the radiator being 9-10 years old (since 2011 technically was sold in 2010) could being FBO have been the final straw on my worn out radiator? Ive done some pulls but nothing that I figured wouldve blew out my old radiator lol. Idk im probably just being a worry wart.
Ordered a new rad/hoses/hose clamps from Bell Lexus today (it was the 1640038211 part number, so no shiny new reservoir tank lol)
2011 at 80k miles and a week (to the day) since installing headers.
Besides the radiator being 9-10 years old (since 2011 technically was sold in 2010) could being FBO have been the final straw on my worn out radiator? Ive done some pulls but nothing that I figured wouldve blew out my old radiator lol. Idk im probably just being a worry wart.
Ordered a new rad/hoses/hose clamps from Bell Lexus today (it was the 1640038211 part number, so no shiny new reservoir tank lol)
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RJMacReady (08-17-24)
#48
Lexus Fanatic
iTrader: (10)
Joined: Nov 2004
Posts: 13,441
Likes: 1,064
From: Under an IS F since 2008
Well I joined the failed radiator crew today lol.
2011 at 80k miles and a week (to the day) since installing headers.
Besides the radiator being 9-10 years old (since 2011 technically was sold in 2010) could being FBO have been the final straw on my worn out radiator? Ive done some pulls but nothing that I figured wouldve blew out my old radiator lol. Idk im probably just being a worry wart.
Ordered a new rad/hoses/hose clamps from Bell Lexus today (it was the 1640038211 part number, so no shiny new reservoir tank lol)
2011 at 80k miles and a week (to the day) since installing headers.
Besides the radiator being 9-10 years old (since 2011 technically was sold in 2010) could being FBO have been the final straw on my worn out radiator? Ive done some pulls but nothing that I figured wouldve blew out my old radiator lol. Idk im probably just being a worry wart.
Ordered a new rad/hoses/hose clamps from Bell Lexus today (it was the 1640038211 part number, so no shiny new reservoir tank lol)
Also here is how you know which radiator version you have / need based on production dates.
16400 RADIATOR ASSY
16400-38210 (12/2007 - 02/2011)
16400-38211 (03/2011 - 07/2014)
16400-38H10 if you want the kit and if you have an 08, 09, 10 and some 11's with the older design.
Joe Z
Last edited by Joe Z; 10-23-20 at 06:51 PM.
#49
Yeup.. Your top seal blew just like mine.. I hear is repairable but at the cost of finding the right ship and person to swap the two seals and labor.. You are at the cost of the new rad.
Also here is how you know which radiator version you have based on production dates.
16400 RADIATOR ASSY
16400-38210 (12/2007 - 02/2011)
16400-38211 (03/2011 - 07/2014)
Joe Z
Also here is how you know which radiator version you have based on production dates.
16400 RADIATOR ASSY
16400-38210 (12/2007 - 02/2011)
16400-38211 (03/2011 - 07/2014)
Joe Z
Just feels like coincidence that a week of having headers and my radiator goes lol.
Based on searching using my VIN, it gave me the 38211 part number, ill have to look at my buddies 08 and see if there is any visual difference I can see from the two.
I wanted to go Koyo alumin w/Hayden Transcooler but with temperatures here getting to 20-30's (and my F being a daily) just didnt want to fight with fluctuation of operating temps on the trans fluid. Plus the F may see one or two track days in the next year.
#50
Lexus Fanatic
iTrader: (10)
Joined: Nov 2004
Posts: 13,441
Likes: 1,064
From: Under an IS F since 2008
^^ The difference hard to see is the smaller nipple tube on the top that goes to the reservoir hose.
The newer one is larger and more robust to prevent breaking off.. The older models still running original rad will have the smaller nipple / hose = Production (12/2007 - 02/2011)
Doesn't seem the new part # is designed any better for longevity or etc..
The Top Seal is still failing after x amount of years or miles.. Nothing specific.. When it goes it goes..
Joe Z
The newer one is larger and more robust to prevent breaking off.. The older models still running original rad will have the smaller nipple / hose = Production (12/2007 - 02/2011)
Doesn't seem the new part # is designed any better for longevity or etc..
The Top Seal is still failing after x amount of years or miles.. Nothing specific.. When it goes it goes..
Joe Z
Last edited by Joe Z; 10-23-20 at 07:02 PM.
#52
I just purchased new OEM radiator, upper/lower hoses, v-ribbed belt (serpentine), water pump and thermostat. Figured might as well replace those incase they decide to fail next lol
#53
Joining the club
I noticed my 2008 IS-F with 114,600 miles had a worm clamp securing the hose from the reservoir tank to the radiator. I ordered what I thought was the correct clip (96137-41701) and a new hose (16567-38030) to get rid of that clamp. The new hose would not fit over the radiator outlet. Here is the hose that was installed and the new hose:
This lead me to this thread and the differences in the radiators. My ELE-INSP FAN/REPL SCREWS service was done at the dealer on 4/9/2015 at 55,808 miles. It does not mention anything about a new radiator. It appears I have the new style radiator which was likely replaced during the ELE campaign? While attempting to swap hoses I did notice my radiator is leaking at the seal:
I decided to go ahead and order the 16400-38H10 part number which should come with the hose and clamp I need. Ignore the temporary clamp on there, its the only one I had laying around that would fit. Total from Bell Lexus was $331.97 with free shipping.
My question to you guys, should I just put the hose (16567-38031) and correct clamp (96136-42101) in and wait a while until I want to do a transmission filter service? Will this radiator pop any day while driving? Thanks in advance!
This lead me to this thread and the differences in the radiators. My ELE-INSP FAN/REPL SCREWS service was done at the dealer on 4/9/2015 at 55,808 miles. It does not mention anything about a new radiator. It appears I have the new style radiator which was likely replaced during the ELE campaign? While attempting to swap hoses I did notice my radiator is leaking at the seal:
I decided to go ahead and order the 16400-38H10 part number which should come with the hose and clamp I need. Ignore the temporary clamp on there, its the only one I had laying around that would fit. Total from Bell Lexus was $331.97 with free shipping.
My question to you guys, should I just put the hose (16567-38031) and correct clamp (96136-42101) in and wait a while until I want to do a transmission filter service? Will this radiator pop any day while driving? Thanks in advance!
Last edited by dev2458; 08-16-24 at 12:57 AM.
#54
I noticed my 2008 IS-F with 114,600 miles had a worm clamp securing the hose from the reservoir tank to the radiator. I ordered what I thought was the correct clip (96137-41701) and a new hose (16567-38030) to get rid of that clamp. The new hose would not fit over the radiator outlet. Here is the hose that was installed and the new hose:
This lead me to this thread and the differences in the radiators. My ELE-INSP FAN/REPL SCREWS service was done at the dealer on 4/9/2015 at 55,808 miles. It does not mention anything about a new radiator. It appears I have the new style radiator which was likely replaced during the ELE campaign? While attempting to swap hoses I did notice my radiator is leaking at the seal:
I decided to go ahead and order the 16400-38H10 part number which should come with the hose and clamp I need. Ignore the temporary clamp on there, its the only one I had laying around that would fit. Total from Bell Lexus was $331.97 with free shipping.
My question to you guys, should I just put the hose (16567-38031) and correct clamp (96136-42101) in and wait a while until I want to do a transmission filter service? Will this radiator pop any day while driving? Thanks in advance!
This lead me to this thread and the differences in the radiators. My ELE-INSP FAN/REPL SCREWS service was done at the dealer on 4/9/2015 at 55,808 miles. It does not mention anything about a new radiator. It appears I have the new style radiator which was likely replaced during the ELE campaign? While attempting to swap hoses I did notice my radiator is leaking at the seal:
I decided to go ahead and order the 16400-38H10 part number which should come with the hose and clamp I need. Ignore the temporary clamp on there, its the only one I had laying around that would fit. Total from Bell Lexus was $331.97 with free shipping.
My question to you guys, should I just put the hose (16567-38031) and correct clamp (96136-42101) in and wait a while until I want to do a transmission filter service? Will this radiator pop any day while driving? Thanks in advance!
#55
To add to an old discussion, Figs Engineering now sells an aluminum radiator with the internal trans oil heat exchanger, co-developed/made by CSF. I've also had a Koyo rad on mine for a few years now, without the internal heat exchanger, added an external trans oil cooler with improved racing thermostat, and engine oil external cooler with improved racing thermostat, stock heat exchanger retained and both trans oil and engine oil run almost the same temps from cold start to full operating temps. Driven in temps below 40F up to 90+F. And oh, oil temps (trans and engine) still go up much quicker compared to my RC F with factory oil cooling system.
Last edited by JT2MA71; 08-16-24 at 10:09 AM.
#57
#58
The Koyo radiator does not have an integrated transmission cooler and requires a separate core, as explained by Mike Kojima here.
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21ce (08-19-24)
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