Hey guys,
I know this post is a little late but I think this will help with the brake issue:
I had a datsun 280z that I took in to this hole in the wall shop for a brake job. The shop had to check the brakes 3-4 times because they would just squeal louder a public transit bus (Bus drivers would have to cover their ears when I stoped next to them).
The shop guy eventually told me that it was a suspension issue, meaning that the suspension was not "helping" the brakes by absorbing the weight transfer as the car stopped and go. The brakes were thus exceeding their capacity.
I don't know if the guy was bs-ing or not but that's about all he could do about it he said.
Enter the lexus ls400..
I could not afford the lexus dealership price for discs, pads, etc so I got all my stuff off of Ebay from a company called Trinet in the LA area. I told the guy that I was concerned about brake squealing. He said that they'd installed the set on one of their employee's lexus' and it had no probs.
I installed mine. They do squeal, and did so pretty much after a week or so, especially after city driving for about an hour. My suspension is ridiculously in need of replacement (180k miles) so again I'm assuming I'm in the same position once again with the squealing.
Again, it is the pitching of the car up and down, especially on hills.
Not having OEM (dealership) parts may have some effect on the quality of the brakes (f I had OEM parts maybe the brakes would squeak after 2 hours instead of 1 as I said above) but overall they should be decent enough.
My neighbor just happens to have a 1991 ls400 (I have a 1990) and we installed the same set on his. Now the difference being between our cars:
1) His suspension has been changed (springs/struts - acutally, whatever lexus determined to be worn out because he serviced his suspension at the dealer)
2) He has the dual piston front brakes, I have the single
His car has not squealed at all.
So I read all these squeally posts on ls400 websites and trash talking about aftermarket parts and wonder if my reasoning stands to make sense.
My hands on experience says it does (I think).
Can anyone verify this? If you have "squeally" new brakes, whether OEM or not, are you:
pushing over 150k on your suspension?
if not pushing 150k on suspension do you drive your ls400 mad crazy over speed bumps?
Are your new brakes really cheapo?
Try changing your suspension and see if that helps. If you have to change your suspension to fix the squealing then the suspension was overdue anyways.
BTW be careful out there. My neighbor didn't tighten a bolt down and I think he had the caliper/pad unbolt and drag along the disc while doing 70mph - not a situation that I want to be in.
Double check your install - the dealer won't be liable.