So yesterday I started to notice low coolant level in my car's reservoir. I decided to top it off with distilled water and drove the car around with the heat on to help circulate the coolant. A few hours later I was under the bonet of my car and I noticed the coolant was low again. So I decided to inspect it further because coolant should not be leaking. I know of the water pump issue so I looked around the water pump see if there was a leak, which I did not find any signs of leakage. I then started to inspect the radiator and I noticed a ton of dried up coolant near the top of my radiator. I just want to give people a heads up to check this issue on their cars before the warranty is up. I brought my car to Lexus and they are replacing my radiator under warranty.

I know aftermarket headers have nothing to do with pressure in a radiator but everyone of the club Lexus threads about a leaking radiator is coincidentally tied with a recent header install. I'm not blaming anyone I just want to give everyone a heads up before it is too late.



Joe-Z PTS 304 Stainless Steel / SIKKY Headers / Takeda aFe Cold Air intake / Project Mu / Titanium Brake shims / Michelin Pilot SuperSport 245Front 275 Rear / Escort Redline / Mark Levinson

 

Is there an aluminium aftermarket radiator for the Isf?

 

My radiator leaked and I had to replace it a couple of weeks ago. I have Sikky headers

 

my car is stock, no headers, and mine started to leak around the top tank on the drivers side. I had it replaced under warrantee

 

Looks like a possible issue with the integrity of the radiators.... I haven't even hit 50k miles on my car.

 

Most likely. Mine has has 105k miles but it shouldn't crack still.

 

66k when mine popped

 

Put some 3 dollar Aluma Seal in my radiator with 277,789 miles with a leak. Sealed it right up.

 

See thread below:


https://www.clublexus.com/forums/is-...r-leaking.html


Digger08

 

 

No. Not that one. That's the transmission heat exchanger connection. Maybe you could seal it with an o-ring, but it looks like it might be cracked. Clean it up, very carefully tighten the nut you see next to the radiator and check again for leaking. If it does, just replace the radiator.