Drivers of some 2005-07 RL models may complain of multiple drivability issues during unusually warm weather. Acura says the symptoms usually get worse at higher altitudes and are due to high volatility fuel leading to a vapor lock condition in the fuel rail. Installing a new-design, recalabrated fuel pump and gasket (part No. 17708-SJA-A02) and part No. 17574-SDC-L01, respectively) should remedy the situation.
Owners of 2007-09 ES350 models may complain of brake pedal pulsation or a vibration through the steering wheel when the brakes are applied at highway speeds. Lexus attributes the problems to excess thickness variation in the front rotors. Overly aggressive front brake pad linings are the ultimate villains. Machining the rotors and installing revised front brake pads, part No. 04465-33470, should eliminate the braking issues.
The owner of a 2009-10 Buick Enclave, Chevy Traverse or GMC Acadia may come into your store with a complaint of a small, but persistent, coolant leak.
One likely cause for the leakage, says GM, is an improperly installed lower radiator hose and/or clamp. Removing the hose from the radiator, repositioning it and properly installing the clamp should put an end to the leakage issue.
"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].