Under some driving conditions an accumulation of water may occur inside the air cleaner of the 1984 'J' Series vehicles equipped with the 1.8L Turbo engine. To alleviate the water accumulation condition a 4 mm (1/8 in) hole may be drilled in the lower rib of the air cleaner. See illustration.
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.