Some 2002-07 S-Type, 2003-06 XK8, 2004-07 XJ and 2007 XK models may produce a chirp or squeal from the drive belt on the first start in the morning or following an extended period of inactivity. Jaguar attributed the noise to improper tracking of the belt on the various pulleys. The fix depends on which engine is in the vehicle.
On naturally-aspirated engines, replace the stock idler pulley with a new-design, flanged pulley, (part No. C2C 37064), then install a new drive belt. On supercharged engines, replace the stock idler pulley with a new grooved pulley (part No. C2S 46862), then install a revised pulley bracket (part No. C2C 37056), belt tensioner (part No. C2C 37057) and drive belt.
Owners of 2003-07 Corolla and Matrix models may complain of an irritating squeak from the front brakes when hitting the pedal while moving slowly in Reverse.
One likely cause for the noise, says Toyota, is the front brake pads vibrating in the caliper mounts. Installing new-design caliper mounts (part No. 47721-02141), brake pad support plates (part No. 04947-02120) and bushing dust boots (part No. 47775-02090) should eliminate the noise and prevent further trouble.
Owners of 2004-06 Titan pickup trucks built before Aug. 24, 2005, may complain of a squeaking sound from the rear suspension when going over speed bumps or rough road surfaces. Nissan reports that the noise can occur at one or both sides of the truck, and is most likely due to the leaf spring clip covers rubbing against the sides of the springs. Installing new-design covers (part No. 54099-ZH30A, two per side) and flat-head retaining screws (part No. 01412-0009U) to hold them in place should prevent further noise issues.
To install the new clip covers, begin by putting the pickup on a drive-on lift. Next, remove the clip cover retaining screw. Push inward on the disc in the center of the plastic cover to release it from the clip, then pull up on the cover and slide it off the old clip. Now push in on the disc of the new-design cover and slide it down over the clip. Repeat the procedure for the other clip cover. Install the flat-head screw to hold the covers in place, making sure you peen the side opposite the head with a chisel to hold it in position. To complete the fix, repeat the procedure at the other leaf spring, if necessary.
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has served stints as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' authentic factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via e-mail at [email protected].