1994 Lexus GS 300



July, 10, 2012 AT 10:14 PM

When lug nuts are tightened new brakes and rotor bind where wheel gets so hot it sizzles when water is applied to it. Brand new rotor and pads. Noticed the previous rotor was cut hard on the inside that is why I replaced it almost half of surface was gone. When all bolted up wheel will turn but very hard to turn. Appears that uppper arm has been replaced is it possible brake torque plate is bent causing the caliper to cut hard into the wheel surface?

Question 2 Where is the cabin air filter located?


6 Answers



July, 10, 2012 AT 10:36 PM

Q1-Caliper piston could be binding or the brake hose collasped internally acting as one way check valve-



NOTE: Manufacturer's terminology for this filter is Air Refiner Filter, Clean Air Filter.

Remove the undercover.
NOTE: Pull down the clip areas (3 places# of the undercover to remove. See Fig 1

Fig 1: Removing UndercoverCourtesy of TOYOTA MOTOR SALES, U.S.A, INC. View Full-Screen

Remove the lamp. See Fig 1
Remove the #2# wing nuts and the plate on the bottom of the cooling unit. See Fig 2
CAUTION: The plate and wing nuts will be reused.

Fig 2: Identifying Wing Nuts & PlateCourtesy of TOYOTA MOTOR SALES, U.S.A, INC. View Full-Screen

Remove the #2) filters from the cooling unit. See Fig 3



July, 10, 2012 AT 11:11 PM

Are you able to push the caliper piston all the way in? If so bolt up the wheel and see if the wheel spins free



July, 11, 2012 AT 1:01 AM

I believe it is the caliper not returning because after running the car around the block it was so hot when I hit a water puddle it was steaming. There is caliper dust all over the wheel. It too is very hot to the touch but not a bearing problem because right before I purchased car engine trans and bearings (she handed me a stack of bills 6 inches tall) were all replaced. Caliper boot does not look good seems torn in spots but hoses too are cracked (dry rotted) on the outside. Guess I need to replace them too. Thanks for the cabin air filter now I need to know how to adjust sunroof in the rear it moves about 1/4" does not leak water but there is wind noise. Will turn in ticket for separate question.



July, 11, 2012 AT 1:13 AM

When you activate to close position do you hear the sunroof motor engaging? There's no adjustment-could be binding due to debris-try lubricating it



July, 11, 2012 AT 2:29 AM

Everything works just the 1/4 play at the back of thew moonroof bothers me I just bought vehicle. The moonroof in my Ford F250 truck has no play at all it it a Toyota difference? Or is the gasket worn out and needs to be replaced and if so how?



July, 11, 2012 AT 2:47 AM

Got something -lets retry


WARNING: Since it is possible to operate sun roof for about 60 seconds after ignition is turned off, disconnect negative battery cable or wait at least 60 seconds before servicing sun roof. Failure to do so may result in serious personal injury.

CAUTION: When prying out garnishes (trim pieces) and other parts that are secured by clips, use a plastic tool or a flat-blade screwdriver with tape on the tip to prevent damage.

Fully close the sun roof. Measure sun roof height (distance between horizontal line of roof top and horizontal line of weatherstrip). See Fig 1. See SUN ROOF HEIGHT SPECIFICATIONS table. If height is not as specified, pry out garnishes (trim pieces) from left and right sides of sun roof opening.
Add or remove shims at slider mounts until height is as specified. See Fig 2. Before tightening nuts, ensure glass is square with opening and is aligned. See Figure and Figure.


GS300 Application Desired Height: In. (Mm) Tolerance: In. (Mm) Level +/.059 (+/-1.5)

Fig 1: Measuring Sun Roof HeightCourtesy of TOYOTA MOTOR SALES, U.S.A, INC. View Full-Screen

Fig 2: Adjusting Sun Roof Height (Typical)Courtesy of TOYOTA MOTOR SALES, U.S.A, INC. View Full-Screen


Closing clearance is incorrect if glass is not square with the opening. See Fig 1. To adjust, pry out garnishes (trim pieces) from left and right sides of sun roof opening. Loosen slider mount nuts. See Figure. Reposition glass. Tighten nut

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