Engine - Excessive Induction Noise

Number: 87-19

Section: 9

Date: NOV., 1986
Subject: INDUCTION NOISE


Model and Year: 1987 CELEBRITY WITH 2.5L (VIN CODE R) L-4 ENGINE


TO: ALL CHEVROLET DEALERS

Air Cleaner:

Some 1987 Celebritys with 2.5L L-4 engines may exhibit unsatisfactory levels of engine induction noise due to overtorqued 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 (See Illustration on back).

If customer comments are received on induction noise, remove the air cleaner and check for damage. Repair the cover, if required. Check the air filter element for signs of distortion or crushing. Replace the air filter element if damaged. Reinstall the air cleaner cover and wing nuts. Torque wing nuts to 1.6 - 2.4 N-m (14-21 in.lbs.)