Chrysler Concorde 1993-1997 3.5L MFI 6cyl
Exhaust Gas Recirculation System
This system reduces the amount of oxides of nitrogen (NO
) in the exhaust by allowing a predetermined amount of exhaust gases to
recirculate and dilute the incoming fuel/air mixture. The diluted
air/fuel mixture reduces peak flame temperature during combustion,
which in turn inhibits the production of Nitrogen oxides. The principal components of the system are:- EGR tube (connects a passage in the intake manifold to the exhaust manifold)
- EGR valve
- Electronic EGR Transducer
- Vacuum hosesComponent and System Testing
Removal & InstallationEGR Valve and Transducer
Check the condition of all of the EGR system hoses and tubes for
leaks, hardening or kinks on the rubber hoses. Repair and correct these
conditions before proceeding any testing.
Be sure that the hoses at both of the EGR valve and EGR valve control are connected to the proper fittings.
Be sure the electrical connector is firmly attached at the valve control.
To check the EGR system operation, connect the DRB III scan tool
or equivalent to the 16-way data link connector. The data link
connector is located on the lower edge of the instrument panel near the
steering column. Follow the scan tool instructions.
After checking the system with the DRB III scan tool, proceed to the EGR valve leak and control tests, then repair as necessary.
EGR valve and transducer assembly-3.5 engineThe EGR valve attaches to the back of the cylinder head-3.5L engine
Loosen, but do not remove, the EGR tube to intake manifold screws
The EGR valve attaches to the rear of the right cylinder head.
Remove the vacuum tube from the electric EGR transducer solenoid.
Inspect the vacuum lines for cracking, poor seal due to hardness, or
other problems. Replace with new hoses if necessary.
Remove the electrical connector from the solenoid.
Slide the transducer up and out of the mounting bracket.
Loosen, but do not remove, the EGR tube to the intake manifold screws.
Remove the EGR tube lower screws at the valve.
Remove the EGR valve and transducer.
Clean both gasket surfaces and check for any signs of leakage or
cracks. Replace the components if any such damage is found or if the
valve fails the tests.
Loosely install the EGR valve and a new gasket onto the cylinder head.
Using a new gasket, attach the EGR tube to the valve and tighten the screws to 95 inch lbs. (11 Nm).
Tighten the EGR tube to the intake manifold plenum screws to 16 ft. lbs. (22 Nm).
Tighten the EGR valve to the cylinder head screws to 16 ft. lbs. (22 Nm).
Reconnect the transducer solenoid to the vacuum fitting on the manifold.
Slide the transducer into the bracket.
Reconnect the vacuum lines and electrical wires to the EGR transducer.