RETIGHTEN FUEL METER BODY ATTACHING SCREWS ON TBI 700

ALL 1987 VEHICLES WITH 4-CYLINDER GASOLINE ENGINES

On vehicles using the Model 700 TBI unit, any time the TBI attaching bolts/studs to the intake manifold are installed or retightened, the fuel meter body attaching screws should also be retightened. Tightening the TBI attaching bolts may cause the fuel meter body gasket to compress and allow the fuel meter body attaching screws to loosen. Use the following specifications when servicing Model 700 TBI: (Refer to Section 6E (TBI) in service manual for additional information.)

Tighten TBI attaching bolts/studs to:

2.0L OHC-4 Engine (VIN Code K) -- 21.5 N.m (16.0 Ft. Lbs.) 2.5L L4 Engine (VIN Code R and U) -- 25.0 N.m (18.0 Ft. Lbs.)

Tighten Fuel Meter Body attaching screws to:

All TBI 700 -- 6.0 N.m (53 In. Lbs.)

If the fuel meter body is removed from the TBI unit, be sure to apply threadlocking compound to the fuel meter body attaching screws. Most GM TBI repair kits include a small vial of threadlocking compound. If this is not available, use Loctite 262 or equivalent.

It is not necessary to apply threadlocking compound to the fuel meter body attaching screws if they are being retightened only and the TBI attaching bolts/studs have already been tightened to the proper torque. Proper TBI bolt torque sequence is important: manifold attachment bolts/studs first, then fuel meter body screws.

This bulletin is for information only.

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.