Engine - Excessive Induction Noise
87olds2SUBJECT INDUCTION NOISE NUMBER: 87-T-06
DATE: November 12, 1986
1987 CUTLASS CIERA WITH 2.5L (VIN R) L-4
MODELS/YEARS
ENGINE AND 1987 CALAIS WITH 2.5L SECTION: 6E
(VIN U) L-4 ENGINE
Some 1987 Cutlass Ciera and Calais models with 2.5L L-4 engines may exhibit unsatisfactory levels of engine induction noise due to overtightened wing nuts on the air cleaner cover.. This condition causes the air cleaner cover to become distorted, leaving a small gap between the cover and the air filter element. Some incidents of air filters being crushed have been reported.
FIGURE 1:
If customer comments are received on induction noise, remove the air cleaner cover and check for damage. Repair the cover, if required. Check the air filter element for signs of distortion or crushing. See Figure 1. Replace the air filter element if damaged. Reinstall the air cleaner cover and wing nuts. Torque wing nuts evenly to 1.6-2.4 N-m (14-21 in.lbs.).