The Lexus GS350 F Sport cars use a Brembo style 4 piston fixed caliper. They are legendary for squealing.
There is a TSB that replaces the 2 part rotor with a single style and revised pad coumpound (I believe).
I took our '13 GS350 (77K, excellent condition) to a good local shop to diagnose a suspension clunk. There is another thread on that; the clunk source is not yet determined.
I do most of my own work; in this case I wanted to "put a little more meat on the bone" for them. So I asked them to service the transmission and check the brakes.
I gave them the Lexus filter strainer and 5 quart jug of Idemitsu WS equivalent ATF.
They replaced the rotors and pads. They used Textar pads, which are the supplier to Lexus. The pads cross reference to the original Lexus part number; not the TSB pads.
They did not squeak at first, but that didn't last long.
I pulled apart the passenger side to investigate. The squeal was clearly louder on the right side.
They used a thick black grease on the back of the pad and shim. Messy. None on the metal-to-metal surfaces.
They did not clean the keeper pin, spring or caliper.
I wiped off and cleaned the pad backing and shim, applied a good synthetic lube (Including the metal-to-metal areas) and reassembled the components.
I took it for a spin; the brakes felt great and the squeal was gone. It did come back after awhile, but was much more hushed.
So today I pulled both sides apart, throughly cleaned and lubed the components and reassembled.
Brakes feel great; no squeal for now. Let's see what happens.
If the noise returns to a level I can't live with, I will go purchase the revised Lexus pads and shims.
Our friend @The Critic recommended the Honda spec M77 paste to lube the pad backing. I will take his advice if I install the Lexus pads.
I should have stopped at the Acura dealer in town and picked some up, but I basically flaked. Sorry Michael...
Wish me luck! By the way, the Makita impact (thanks @Trav ) is flat out awesome-sauce!
There is a TSB that replaces the 2 part rotor with a single style and revised pad coumpound (I believe).
I took our '13 GS350 (77K, excellent condition) to a good local shop to diagnose a suspension clunk. There is another thread on that; the clunk source is not yet determined.
I do most of my own work; in this case I wanted to "put a little more meat on the bone" for them. So I asked them to service the transmission and check the brakes.
I gave them the Lexus filter strainer and 5 quart jug of Idemitsu WS equivalent ATF.
They replaced the rotors and pads. They used Textar pads, which are the supplier to Lexus. The pads cross reference to the original Lexus part number; not the TSB pads.
They did not squeak at first, but that didn't last long.
I pulled apart the passenger side to investigate. The squeal was clearly louder on the right side.
They used a thick black grease on the back of the pad and shim. Messy. None on the metal-to-metal surfaces.
They did not clean the keeper pin, spring or caliper.
I wiped off and cleaned the pad backing and shim, applied a good synthetic lube (Including the metal-to-metal areas) and reassembled the components.
I took it for a spin; the brakes felt great and the squeal was gone. It did come back after awhile, but was much more hushed.
So today I pulled both sides apart, throughly cleaned and lubed the components and reassembled.
Brakes feel great; no squeal for now. Let's see what happens.
If the noise returns to a level I can't live with, I will go purchase the revised Lexus pads and shims.
Our friend @The Critic recommended the Honda spec M77 paste to lube the pad backing. I will take his advice if I install the Lexus pads.
I should have stopped at the Acura dealer in town and picked some up, but I basically flaked. Sorry Michael...
Wish me luck! By the way, the Makita impact (thanks @Trav ) is flat out awesome-sauce!
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