blkstealthpaid4

I have changed the upper control arms twice on the drivers side(this is where the shaking is heard)I feel the brake pedal and the steering shaking when I apply the breaks.I even had the rotors resurfaced and changed the pads.I even tried to apply very slight brake pressure where the nose of the car wouldn't dip to affect the suspension I still felt pulsation.This is telling me that the problem is brake related.Caliper..........etc???????
My mechaic said both control arms are not shaking.

Rollin

Go with some new front rotors. Having them turned will do for awhile but the metal the was once warped/heated will still be affected under high heat conditions, and they'll warp again.

blkstealthpaid4

I remember buying them from carparts.com and I have resurfaced them only once.

blkstealthpaid4

My mech told me to bring the car and he will will remove the plastic mesh to check it thoroughly.I mean every joint,bushing and support.I also changed the tire rod on that side 3 months ago

petrojeff

You got warped rotors. Turning rotors does not get rid of the warpage.

blkstealthpaid4

This problem started even before they resurfaced the rotors and the problem was still there.Warped rotors even after it's been resurfaced on a 5 month old rotor?I will really find out by saturday.

petrojeff

Let us know what the outcome is. I vote for warped rotors.

BkInBlk

I am assuming that you have a 90-92 LS400. If you do, this was noted as a problem in this model. The early LS400's had rotors that were too thin, and when they heated up, they warped. In 93 they came out with a better rotor. You may want to contact the dealer and see if the newer rotor fits the car. I vaguely remember that Lexus did something to address this problem, i.e. retrofit of an ugraded rotor, but I may be wrong.

blkstealthpaid4

Also remember that the rotors on this car is not stock and I bought them from carparts.com
I remember they do mention the thickness of the rotors and that it was made thicker than stock.This info is on their site.
I will let you guys know the outcome by tuesday.

petrojeff

If possible let us know the brand of rotors you originally bought from carparts.com. Also please let us know the year of your Lexus. Good luck!

blkstealthpaid4

http://www.carparts.com/parts/sample...id=&pagesize=9



"Brake Disc, Vented Rotor; Front; Some 1990 models were retrofitted w/1991 components.(199 0= 23mm minimum thickness;1991= 26mm minimum thickness.)
• Usually ships in 1 - 3 business days. BECK/ARNLEY 083-2337 $115.26 $84.79 $0.00 Each
Rotor, Rr.
• Usually ships in 1 - 3 business days. BENDIX 141644 $151.72 $103.84 $0.00 Each
Rotor, Frt.; w/Rr. Disc Brakes
• Usually ships in 1 - 3 business days. BENDIX 141643 $121.36 $83.07 $0.00 Each
Disc Brake Rotor, Rear; All; Rotor Only.; VIN U Listing
• Usually in stock and available to ship within 2 business days. RAYBESTOS 96359 $146.33 $106.84 $0.00 Each
Rotor Assembly, All; Rotor Only.; VIN U Listing
• Special order product / Usually ships in 10 - 15 business days. RAYBESTOS 96356 $117.04 $90.59 $0.00 Each
Rotor, Rr.; Fr. 6/89
• Special order product / Usually ships in 10 - 15 business days. WAGNER BD125029 $174.06 $139.25 $0.00 Each
Rotor, Frt.
• Special order product / Usually ships in 10 - 15 business days. WAGNER BD125031 $140.90 $112.72 $0.00 Each

Component: BRAKE LINING, FRONT
Description glossary Manufacturer Part Number List Price Your Price Core Price Unit Qty Qty Add to Cart
Pad Set, Front; All; VIN U Listing, Price per two wheel set
• Special order product / Non-returnable / Usually ships in 10 - 15 business days. AC DELCO 17D476 $51.49 $46.52 $0.00 Set
AXXIS Deluxe Brake Pads, Front; IOE pad material. If OE is semi-met,only replace with sem i-met.
• Usually ships in 1 - 3 business days. BECK/ARNLEY 088-1379D $93.24 $48.56 $0.00 Each
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I think the thickness started in 1991
Mine is a 90.

petrojeff

OK got the link, which rotors did you buy?

blkstealthpaid4

Could my rotors be already gone within five months or just warped again?
I hate to keep changing these pads whenever they cut the rotors.

petrojeff

I think the rotors just keep warping with use. I dont know what your driving habits are, but five months with new rotors just does not seem right, unless you drive like a soccer Mom. Also you mention that you have a 90 Ls. They might just be giving you the thinner rotors because that is what they had in 1990. Obviously you want the thicker one. I dont think you necessarily have to change your pads if there is sufficient thickness remaining. Just realize if you get talked into resurfacing the rotors, that might not fix the problem depending on the amount of offset due to the warpage. If turning the rotors does fix the problem it will probably only be temporary and they will warp again. I think you need to get a new set of rotors and go from there. You might try a junkyard and get rotors from a 93 or 94 if you want to save some money.

blkstealthpaid4

i guess they call it the micronmeter to measure the thickness of the rotor.He now needs to use this equipoment and then check the warpage.This will give me an idea of what i need.This is a new shop and has no cutting machine!
quite informative!
Thanks!