Plenum Assembly Idea

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OwnerCS
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Joined: Thu May 27, 2010 4:34 am

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On one of my trips to the Pull-A-Part salvage yard in Memphis, I found this plenum in the trunk of a Mercedes 280 SE parked near the Q45 where it had been pulled for some purpose but then abandoned before it could be taken through the checkout line. It appeared to have been living in that trunk for a while so I felt sure I wasn't raiding some other junkyard customer's Q45 cookie jar.

Immediately I was surprised the vacuum hoses were still mostly intact. The original hose clamp from the 3-way vacuum splitter had been released and moved away from the coupling area so the plenum could be removed as a single unit. So then I threw the plenum into the wheelbarrow and continued my treasure hunt by pulling a driver side window regulator, phase II injector rails with accompanying wiring harness, nuts, bolts, and a few tchotchke items like the plenum emblem and a chrome hood emblem from a 1990 model that must have went unnoticed by some earlier wannabe kitsch collector like me. LOL.

When it was time to leave, I think the checker just didn’t want to deal with a full wheelbarrow load of items that I schlepped up to the counter at two minutes till closing time. So I nabbed this plenum with all the attached trimmings for $40. Once I was on well on my way back across the mighty Mississippi, I kept wondering about the person that managed to pull the plenum by disconnecting the fewest vacuum hoses possible to effecively spring its release from the host engine. It was clear to me that person knew exactly where to release the hoses that delivered the complete plenum assembly to the trunk of a rusting Mercedes carcass.

After studying this plenum, to looks to me like I may be able to assemble mine to produce a complete unit like the picture. If I can connect and clamp the 3-way vacuum hose to the metal vacuum "tube to nowhere" after the plenum has been lowered into position, it might save me some time and a few scrapes to boot.

So for this episode’s $64,000 question, are there any known problems with building out a plenum like the one in the picture and then installing it as an complete assembled unit?


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speedeast
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It's more difficult to put on than remove, but there's no reason it can't be done. Just keep in mind that once the plenum sits on the manifolds, you can't really access anything beneath it.

3Q Jay
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i've done g50 plenum now3x, all on TCS variant cars, so i'm all about pre-assembling as much as possible. You hit on a good solution. I did it that way the last time and it was helpful. there is still some finessing needed around the #7 lower runner.

OwnerCS
Posts: 1771
Joined: Thu May 27, 2010 4:34 am

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Thanks guys for the encouragement.

I've got it assembled and ready to install. I'm going to give my back a break tonight then get up early and finish this off tomorrow. When I reach this point, mistakes seem to happen. I can wait a few more hours.

Some pictures of the runners and plenum are below.

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qship96
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Joined: Sun Nov 24, 2002 11:31 am
Car: 1996 Infiniti Q45

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damn that engine looks so good I would be tempted to pull it from the car, sit it my living room, slap a piece of glass on top of it and use it as a cocktail table!

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elwesso
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Agreed with Q ship it looks very nice!

If nothing else assembling will help make sure the hoses go into the right place, and like speedeast said its harder to put it on then it is to take it off in general.


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