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Discussion Forum

450D intake manifold

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07-28-2001 14:46:29

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While taking apart and cleaning up the intake manifold off of my 450D today I noticed that the front endcover has no place for the wire from the coil or the wire from the ing switch like what is shown in my 400D parts book(I assume the 400D and 450D manifolds are the same?). The front and back covers are the exact same. When I took them off, the back cover was full of motoroil, should it have oil in it? The front cover does contain some type of a switch, but there is no way for any wires to be hooked up to it. Anyone know why its like this? Thanks.

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07-28-2001 16:38:53

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 Re: 450D intake manifold in reply to Jon, 07-28-2001 14:46:29  
On the MD, the switch inside that front cover on the manifold grounds out the magneto when in diesel mode. It opens in gas mode so the magneto is not grounded and can make a spark. The wire to the magneto comes out of the bottom of the chamber that has the switch. There is a grommet in the hole to protect the wire. The back chamber has the mechanism that operates the manifold butterflies that direct air though the carb in gas mode. Don't think oil should be in there. Must have gotten in there from a leak at the cross shaft that operates the switch over mechanism, or maybe a cylinder is blowing oil out and it leaked around the shaft into the chamber.

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07-28-2001 17:20:59

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 Re: Re: 450D intake manifold in reply to haas, 07-28-2001 16:38:53  
Thanks Haas. After I got to looking at it a little more I noticed that hole and began to wonder if that might be where the wires go. Guess while I have it down I might as well replace those crossshaft seals.

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