CYLINDER HEAD BOLT LENGTH SERVICE INFORMATION

MODELS/YEARS: 1985 CALAIS EQUIPPED WITH 3.0L V-6 ENGINE (VIN CODE L)

There are three different length head bolts used on the 3.0L V-6 engine (VIN Code L). Head bolt length by location is shown in Figure 1.

3.0L head bolts are a new torque yield type bolt. It is recommended that new bolts be installed each time the cylinder head is removed.

SERVICE PROCEDURE

1. Tighten bolts to 35 N - m (25 lbs. ft.) in sequence shown in Figure 2.

2. Turn each bolt 1/4 turn (90 DEG) in sequence shown. See Figures 2 and 3.

3. Turn each bolt an additional 1/4 turn (90 DEG) in sequence shown.

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.