400/440 HP EGR valve picture

[vegiguy]

I had a request for a picture of this EGR valve that I bought NOS on eBay. As far as I know it fits 1973-74 400 and 440 "high performance" (with 4 bbl carb) engines. It fit my engine perfectly. The mounting studs on the intake manifold are 2" apart (c-to-c) and in a plane perpendicular to the driveline. The valve mounts with the diaphragm port pointing FORWARD. As far as I know this valve will NOT fit a 2 bbl carb engine.

 

['68 Charger]

Hello, I believe that I was the member that requested a pic of your EGR. Thanks for posting. Yep that is definitely different than my 2bbl (see pic) #3870 635. The mounting studs on my intake manifold are 3-1/8" apart (c-to-c) on the EGR. This will make for great reference in the future.

 

[vegiguy]

Hello, I believe that I was the member that requested a pic of your EGR. Thanks for posting. Yep that is definitely different than my 2bbl (see pic) #3870 635. The mounting studs on my intake manifold are 3-1/8" apart (c-to-c) on the EGR. This will make for great reference in the future.

You're welcome. I hope others can benefit from this. It's always nice to have part numbers and actual pictures of what parts are supposed to look like when fixing up these old cars.

 

[mopar 3 B]

73 and 74 EGR valves are not the same. May look alike but function differently.

 

[vegiguy]

How are they functionally different? All an EGR valve does is recirculate some of the exhaust gas back into the engine using a vacuum source to open and close the valve. I know there were several refinements over the years supposedly making the valves work better but they all did the same basic thing. I feel lucky to just find A valve for my engine as rare as these parts are getting. I figure IF - and that's a big IF - I have a '74 valve on my '73 engine then at least I'm not going backwards in design. It's better than having a plate over the hole like I had looks wise, although these old engines work fine with or without EGR.

 

['68 Charger]

Yea the block off plate looks cheesy as I had to do that one time.

 

[mopar 3 B]

How are they functionally different? All an EGR valve does is recirculate some of the exhaust gas back into the engine using a vacuum source to open and close the valve. I know there were several refinements over the years supposedly making the valves work better but they all did the same basic thing. I feel lucky to just find A valve for my engine as rare as these parts are getting. I figure IF - and that's a big IF - I have a '74 valve on my '73 engine then at least I'm not going backwards in design. It's better than having a plate over the hole like I had looks wise, although these old engines work fine with or without EGR.

I will see if I can locate the service bulletin and post it.