I'm in the process of changing a head gasket on my 82 240D and while I have everything off decided to remove the emissions garbage. I removed the egr valve and make a blank off plate to cover its hole on the intake manifold. I made a blank off disk for the exhaust manifold port.

Now for the question. Inside throat of the Intake manifold is a butterfly valve that is run off the throttle linkage, is there a reason to keep this butterfly valve or is this just part of the emissions gear? Being a diesel I would think that it would be better to remove it and let the engine take in as much air as possible. Any thoughts?

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Hodakaguy
(Tom C)

82 240D - 4 Speed