CHOKE VALVE- THERMO-WAX CONTROLLED VALVE REPAIR

1985 "M" SERIES VEHICLES ARE EQUIPPED WITH AN ASIAN TWO-BARREL DOWNDRAFT TYPE CARBURETOR, THAT INCORPORATES AN AUTOMATIC 'THERMO-WAX' CONTROLLED CHOKE VALVE IN THE PRIMARY SYSTEM. THE THERMO-WAX ELEMENT IS ATTACHED TO THE AIR HORN, AND IS PRE- CALIBRATED AT THE FACTORY. NO ATTEMPT SHOULD BE MADE TO ADJUST THIS COMPONENT AT EITHER THE THERMO-WAX ELEMENT PISTON TO CAM FOLLOWER LEVER, OR AT THE RACK GEAR TO PINION SUPPORT ARM. YOU WILL NOTE THESE ATTACHMENT POINTS ARE WHITE PAINT DABBED AT THE TIME OF FACTORY CALIBRATION. THE SERVICE AIR HORN ASSEMBLY, P/N 96053395, INCLUDES THE FACTORY CALIBRATED THERMO-WAX ELEMENT. IF A WAX ELEMENT OR ITS LINK SYSTEMS ARE DETERMINED TO BE INOPERATIVE, THE AIR HORN ASSEMBLY MUST BE REPLACED.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.