1997 Buick Regal Owner's Manual - Page 292

Air Cleaner To check or replacethe air filter, loosen the wing nut on the air duct and lift up on the two clips located on the top of the filter cover, Disconnect the duct and reposition it while removing the side cover. r Operating theengine with the air cleaner off can cause you or others to burned. The air cleaner be not only cleans the air, it stops flame the engine if engine backfires, backfires. If it isn't there, and the you could be burned. Don't drive with it off, and be careful workingon the engine with the air cleaner off. Pull out the filter. Be sure to install the air filter and install the cover tightly when you are finished. Refer to the Maintenance Schedule to determine when to replace the air filter. I NOTICE: If the air cleaner is off, a backfire can cause a can And, damaging dirtfire. engine get easily into your engine, which damage it.Always will have the air cleaner in place when you're driving. See "Scheduled Maintenance Services" in the Index. I I 6-16