Kindly Reminder: Please confirm your own CAR MODEL and the Original Equipment Manufacturer (OEM) number of the item you need before placing the order. If you can not confirm it, please leave online meage including your car VIN CODE and any other information of the parts that you known. We will try to check and confirm it for you. ZJ2010235 Cylinder Head Valve Cover Gasket For MAZDA 3 USED FOR CAR MODELS: FOR MAZDA 3 (BK) 2003/10-2009/12 3 (BK) 1.6B6ZE 1598774Hatchback2003-2009 FOR MAZDA 3 (BL) 2008/12-2014/09 3 (BL) 1.6 MZRZ6 1598774Hatchback2008-2014 FOR MAZDA 3 Saloon (BK) 1999/09-2009/06 3 Saloon (BK) 1.6Z6 1598774Saloon2004-2009 FOR MAZDA 3 Saloon (BL) 2008/12- 3 Saloon (BL) 1.6 MZRZ6 1598774Saloon2009-2014 INSTRUCTION RELATED TO VALVE COVER GASKET 1. The valve cover gasket is a flexible, steel-reinforced rubber sheet that forms a seal between the valve cover and engine block. The gasket prevents oil from seeping into the spark plug housing. The valve cover gaskets are vital to vehicle functionality they prevent oil from leaking all over the cylinder head and the engine block. 2. What can a leaking valve cover gasket cause? A leaking valve cover gasket can cause the following: 1). Engine is running rough One of the most common symptoms of a valve cover gasket is engine running rough. The engine tends to run rougher at idle and when you accelerate, which may be accompanied by white smoke in the exhaust. 2). Oil Leak One of the most obvious signs that your valve cover gasket needs to be replaced is oil on your driveway or oil that is being deposited on your engine parts. 3). Oil in Spark Plugs One of the tell-tale signs that an engine is burning a lot oil and you have a valve cover gasket problem is if you find oil in the spark plugs. An exce of oil being burned will often get paed through to where it needs to go in the cylinder head and when it does, it will end up in the spark plugs. 4). White Smoke in Exhaust One of the tell-tale signs that an engine is burning a lot of oil and you have a valve cover gasket problem is if you find oil in the spark plugs or white smoke in your exhaust. White smoke typically indicates that your engine is burning oil. 5). Engine Misfires One of the tell-tale signs that your valve cover gasket needs to be replaced is if you are experiencing misfires. Misfires can occur in any number of parts of your engine, but they are typically caused by oil leaking onto wiring or spark plugs.