IS F (2008-2014) Discussion topics related to the IS F model

Cracked Radiator 2008 IS-F

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Old 03-07-19, 03:51 PM
  #16  
Joker4096
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Originally Posted by rem0rse
Any definite way to check whether your headers are cracked without going underneath the car?
Maybe with a borescope but I can clearly hear it. So I'm not 100% sure.
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Old 03-07-19, 05:00 PM
  #17  
ISFpowered
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Originally Posted by rem0rse
Any definite way to check whether your headers are cracked without going underneath the car?
On cold start your car sounds like absolute crap. Mine did.
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Old 03-07-19, 07:44 PM
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clarionguy
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Did this repair earlier in the year - cracked on the smaller inlet on the top of the radiator - such a **** off

Also the rubber isolators at the bottom - just "loosen" the bolts as the radiator at the bottom is an open slotted hole and could slide out - i made the mistake to take them off completely and they were tough to get back threaded due to limited space or extra work
Oh wait - you are switching to the aftermarket stuff - maybe will be the same hole setting
Old 03-07-19, 07:57 PM
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Originally Posted by rem0rse
Any definite way to check whether your headers are cracked without going underneath the car?
Exhaust leak "tick" on cold start for a few seconds, then goes away

Old 03-11-19, 07:03 AM
  #20  
imp0rted1
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Joker,

how was the install? what is involved with bypassing the transmission heat exchanger? Any ill effects from doing this?

considering upgrading to the koyo but not sure if i want to buy the koyo from RR with the external trans cooler..
Old 03-11-19, 07:36 AM
  #21  
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Originally Posted by imp0rted1
Joker,

how was the install? what is involved with bypassing the transmission heat exchanger? Any ill effects from doing this?

considering upgrading to the koyo but not sure if i want to buy the koyo from RR with the external trans cooler..
Fitment is perfect as I have a koyo, trans and oil cooler from RR racing. The trans cooler is significantly bigger and thicker then the oem by far. I had to add more trans fluid (about one quart). Absolutely no ill effects bypassing the heat exchanger. To me the setup looks great and love how it looks from the front end.
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Old 03-11-19, 09:10 AM
  #22  
msgs350
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Originally Posted by ISFpowered


Fitment is perfect as I have a koyo, trans and oil cooler from RR racing. The trans cooler is significantly bigger and thicker then the oem by far. I had to add more trans fluid (about one quart). Absolutely no ill effects bypassing the heat exchanger. To me the setup looks great and love how it looks from the front end.
Can you post pics of your radiator and coolers?
Old 03-11-19, 09:58 AM
  #23  
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Originally Posted by msgs350
Can you post pics of your radiator and coolers?
The engine bay you can kinda see the koyo radiator. Where the top hoses connects would be black not shiny. The coolers looking at the pic left to right trans cooler then oil cooler along with some hella sharptones horns.
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Old 03-11-19, 11:28 AM
  #24  
imp0rted1
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ISFpowered,


did you need any additional items (lines/ tubing/fittings) to connect the new RR - trans cooler?
Old 03-11-19, 11:33 AM
  #25  
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Originally Posted by imp0rted1
ISFpowered,


did you need any additional items (lines/ tubing/fittings) to connect the new RR - trans cooler?
It includes everything you need. I deleted the hard lines to make more room so I had to buy a few feet of hoses but that’s it. Everything was just way to cluttered and I didn’t like it so now I have WAY more room to maneuver.
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Old 03-19-19, 07:14 AM
  #26  
Joker4096
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So I changed the radiator and bypassed the trans heat exchanger. The only con of the Koyo radiator was that is is much thicker so the fans sit further towards the engine than previously. Besides that, it was a pain in the *** to install do to the wires that attached to the radiator support T bar lol. Don't forget to loosen the two small bolts that hold the bottom of the ac condenser to the oem radiator.
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