Replace EGR Valve
How to Replace an EGR Valve
The EGR or exhaust gas recirculation
valve is used to control the knox (no2) gasses in your
engine. These gasses are produced
by high combustion chamber temperatures and can be lethal if not controlled. Also
with these high combustion temperatures the engine will produce a ping or knocking
sound, which is causing damage to your car's engine. The EGR valve allows
exhaust gasses to enter the intake
manifold, in turn lowering the intensity of the combustion event. This valve is
actuated by either vacuum or electronically controlled solenoids. The systems effectiveness
is monitored by the oxygen sensors
or EGR position sensor. When the EGR valve fails it can cause a service engine soon
or
check engine light to illuminate. Most EGR valves are located on or near the
intake manifold of the engine.
Place your car on level ground with the emergency brake set and in park. You
will be dealing with grease so please wear protective eyewear, gloves and clothing.
Supplies and Tools Needed to Complete this Job 1. Replacement EGR valve 2. Shop towels 3. Wrench set 4. Ratchet with socket set 5. Gasket scrapper
6. Screwdriver set
Instructions Step 1 - Activate the hood release of your car, next locate and undo the secondary release and raise the hood. If needed install prop rod to support the hood for safety. Step 2 - Remove intake manifold cover if equipped. Step 3 - Locate EGR valve on or near the intake manifold. (If you cannot find the EGR valve consult a car repair manual).
Step 4 - Remove the electrical and/or vacuum line from the valve Step 5 - Gently pry on the valve to "pop" it loose and remove the valve. Step 6 - Carefully remove and clean the gasket surface, Use paper or equivalent to block port to help stop debris from entering the intake and exhaust ports. Step 7 - Match the replacement valve to the new EGR valve. (Note: some egr valves will be updated and not look exactly the same). Step 8 - Install the new gasket with the replacement valve. Step 9 - Reconnect the wiring and/or vacuum line. Step 10 - Clear any activated trouble codes. (Note: If a trouble code is present and the EGR valve was replaced and the codes cleared and you are unsure the valve could be the problem, it will take about a half an hour of driving before the system has reset. If the check engine light stays out the problem is fixed).
Best Practices
Supplies and Tools Needed to Complete this Job 1. Replacement EGR valve 2. Shop towels 3. Wrench set 4. Ratchet with socket set 5. Gasket scrapper
6. Screwdriver set
Instructions Step 1 - Activate the hood release of your car, next locate and undo the secondary release and raise the hood. If needed install prop rod to support the hood for safety. Step 2 - Remove intake manifold cover if equipped. Step 3 - Locate EGR valve on or near the intake manifold. (If you cannot find the EGR valve consult a car repair manual).
Step 4 - Remove the electrical and/or vacuum line from the valve Step 5 - Gently pry on the valve to "pop" it loose and remove the valve. Step 6 - Carefully remove and clean the gasket surface, Use paper or equivalent to block port to help stop debris from entering the intake and exhaust ports. Step 7 - Match the replacement valve to the new EGR valve. (Note: some egr valves will be updated and not look exactly the same). Step 8 - Install the new gasket with the replacement valve. Step 9 - Reconnect the wiring and/or vacuum line. Step 10 - Clear any activated trouble codes. (Note: If a trouble code is present and the EGR valve was replaced and the codes cleared and you are unsure the valve could be the problem, it will take about a half an hour of driving before the system has reset. If the check engine light stays out the problem is fixed).
Best Practices
- Always inspect the vacuum line that feeds the valve. Heat can make this line brittle causing a crack or break allowing a vacuum leak. This condition will hinder the operation of the valve.
- Replace the sealing gasket between the valve and intake manifold. If this gasket fails it can cause a vacuum or exhaust system leak.
- Use WD40 or equivalent to help loosen rusty mounting bolts/nuts.
- Use OEM replacement parts