Mechanics

CHEVY CLENING THE EGR VALVE

1991 Chevrolet Blazer

Engine Performance problem
1991 Chevy Blazer 6 cyl Four Wheel Drive Automatic

HOW DO I CLEAN THE EGR VALVE ON MY 1991 CHEVY S10 BLAZER WITH THE 4.3 ENGINE?
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Bbigben72
August 12, 2010.




Open the hood and locate the EGR valve.

Unplug the vacuum hose or electrical connector from the top of the valve, depending on your particular model.

Unscrew and remove the two mounting valve-to-engine bolts using a wrench or ratchet and socket.

Disconnect the pipe from the bottom of the EGR valve using a wrench or adjustable wrench, being careful not to damage the connecting nut.

Lift the valve away from the engine compartment and remove the gasket.

Detach the EGR solenoid from the top of the valve, if your particular model comes equipped with one. Remove the four screws using a Phillips screwdriver.

Clean the EGR Valve

Remove carbon deposits from the bottom passage on the valve using a scratch awl.

Remove carbon deposits from the pipe and engine valve passages using the scratch awl.

Remove any gasket material from the bottom of the valve and engine-mounting base using a plastic scraper to avoid damage to the mating surfaces.

Install the EGR Valve

Attach the EGR solenoid to the top of the valve, if your particular model comes equipped with one.

Set the valve in place on the engine, along with a new gasket if necessary.

Start the two mounting valve-to-engine bolts by hand to avoid thread damage.

Start the pipe-to-valve nut by hand to avoid thread damage.

Tighten the two mounting bolts and the pipe nut.

Plug the vacuum hose or the valve sensor electrical connector.

Bluelightnin6
Aug 12, 2010.


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