2015 RCF 170,000 miles, anyone higher?
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09-06-23, 10:13 AM
#2
Lexus Test Driver
Probably that seems to be one of the highest, if not the highest. Great to hear it is going strong. 
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DenSmith (09-06-23)
09-06-23, 01:25 PM
#3
Wow...no valley plate leak? You can check with a borescope where the coolant pools. I made one for the ISF...it would pool in the same location. Check out my video below.
My ISF started leaking at around 66k miles at 8 years old.
My ISF started leaking at around 66k miles at 8 years old.
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vraa (09-07-23)
09-06-23, 06:49 PM
#4
Pit Crew
Thread Starter
Wow...no valley plate leak? You can check with a borescope where the coolant pools. I made one for the ISF...it would pool in the same location. Check out my video below.
My ISF started leaking at around 66k miles at 8 years old.
https://youtu.be/XIGa3hm6MtE?si=t44kr7RbX1qAyPlu
My ISF started leaking at around 66k miles at 8 years old.
https://youtu.be/XIGa3hm6MtE?si=t44kr7RbX1qAyPlu
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vraa (09-07-23)
09-06-23, 08:11 PM
#5
Lexus Test Driver
Mine is still at only 11,000 miles after 7+ years. Just even thinking about 170,000 miles is beyond my imagination at this rate LOL
09-06-23, 09:23 PM
#6
with that high of a mileage I suggest to go to Amazon and get a $20 borescope and run the camera end exactly like the video I sent.
when I had the valley plate leak on my isf I had little to no symptoms. Not even a trickle of coolant leak on the underside plastics or the floor. Lexus techs missed it dozens of times during routine checks.
I think once you notice the coolant reservoir it’s already leaked significantly in the valley plate.
you can still drive with it and the car will still perform and pull just as hard but the leak will get worse and worse. be wary if you decide to track the car. Check the ISF forums, they get into it a lot and even know the improved sealant to use.
09-28-23, 09:35 AM
#7
Driver School Candidate
That's awesome, i am about to click over 131k on mine today as a matter of face. Drove it to my dealer today on this gorgeous fall-ish day! These F cars are amazingly reliable, I was a lexus technician from 2011-2022, am a service advisor now and these are probably the best cars we've ever built!
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