Tuesday, March 18, 2014
How to Fix EGR Valve
An EGR valve is a factory sealed unit, so it cannot be re-manufactured, but the problems associated with a failing EGR valve can be solved by replacing the unit. The EGR valve (exhaust gas recirculation valve) is usually found near the exhaust manifold but can also be found elsewhere on transverse engines. The purpose of an EGR valve is to burn exhaust gases a second time to aid in emissions and help fuel economy. When defective, an EGR valve causes poor acceleration and rough idle. A defective EGR valve often makes a flutter noise.
Instructions
- 1
Locate the EGR valve. A schematic of the car engine is a great help in locating the EGR valve.The EGR valve looks like a small round can with a small hat on top. A digital EGR valve will have a wire loom connected to it; a manual EGR valve will have vacuum lines connected to it. The base plate of the EGR valve, which is on the intake manifold, is connected to a small metal tube that runs to the exhaust manifold. The EGR valve is easiest to locate by tracing all lines, other than the exhaust pipes that connect to the exhaust manifold. The EGR valve may also may be connected to the EGR solinoid.
2Remove all parts that obstruct access to the two EGR base plate bolts. Unplug the metal tubes, any vacuum lines and electric connections to the EGR valve.
3Remove the bolts that hold the EGR valve to the base plate. These bolts are usually 1/2 inch or 12 mm.
4Install a new factory-sealed EGR gasket. Replace the valve gasket, using gasket sealer prior to re-installation. Torque the bolts to manufacturers specs (approximately 11 to 16 foot pounds).
5Working in reverse, reconnect all tubes, lines and electrical connections. Replace all other items that were removed to reach the EGR valve.
