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Emissions equipment


JFM
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I just recently bought a 1976 O2 from Portland and it came with no emissions setup, all the equipment has been ripped out.  In Boulder, CO I have to have emissions equipment to get tested and have to have a pass.  The cut-off year for classic plates is 75, which do not require a test, so I have to have an emissions test and pass that, it is good for 5 years.  Does anyone have any experience with putting this equipment back in and where to get it.  I have found the air valve pump and belt and a few other hoses but the brackets for the air pump are to me non-exsistent at this point.  Does anyone have any that they have removed and want to get rid of it.  any help guidance or pictures of a working setup would be greatly appreciated.

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Do you have the original 49-state exhaust manifold (with air injection port)?

If so, all you need is the air pump, mounting bracket, control valve and hose (with check valve).

You are lucky to not need a thermal reactor, EGR and retarded distributor like we do for all '76 California cars!

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I do have a 49-state car but need to check on the exhaust manifold.  I am ver y new to all this and trying to figure it out.  I did find the air pump for about $150 refurbished and I think I can get a control valve and hose but he bracket and how to hook it all up is still a mystery.  How do I check to see if I have the correct manifold you mention?  I plan on posting some pictures tomorrow.  thanks again.

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There should be some sort of pictographic representation of the emissions equipment on an underhood sticker that will at least identify all the bits and pieces that you will need.  If the manifold is original, the air pipe inlet has most likely been plugged (IIRC a quarter fit nicely).  And the air pump (if it's the same as the one on my '69) is a GM part made by Saginaw Gear Works in Michigan USA.  

 

I'll bet someone on the board who bought a CA car--or one from anywhere else where there are no emissions inspections--and immediately pitched all the emissions stuff can help you out.

 

mike

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I believe the answer to the “Do I have a ‘76 49-State exhaust manifold?” is no.

 

Notice in the first and second photos below that the original manifold has a fitting on its nose where the line from the diverter valve (coming through the one-way valve just in front of the head) connects to the manifold.

 

The original manifold originally wore an aluminum heat shield on these ‘76 49-State versions.  Thus, going from the exhaust manifold, you have (a.) a fitting (not yet installed in the first through third photos, but installed in the fifth photo), (b.) a specially-fitted elbow, (c.) the one-way valve, and then (d.) a longer hose to the diverter valve (a.k.a., gulp valve).

 

There are two different factory versions of that elbow (fourth photo below).  I don’t know why.  My original elbow was rusting through but a new elbow of the “other” style was still available from BMW (in 2011).  So Korman took the “other” style elbow — end fittings are the same on both versions — and welded in a section to make the new “other” style elbow match my original.  It was re-plated after this so the evidence of this process is hidden (fifth photo below).

 

In the second and third photos, you can see a small bracket/brace coming off the front valve cover bolt.  It doesn’t actually support the hose from the diverter valve to the manifold, it just keeps the hose from contacting the head.  In these two photos, the elbow is not yet solidly connected to the manifold so the hose is hanging limply.  When everything is tightened up, the black rubber hose nests against that brace.

 

Notice also in the third photo that the diverter valve is supported by a bracket — freshly re-plated in this photo — that secures to, or just behind, the oil filter bracket.

 

Regards,

 

Steve

 

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Edited by Conserv
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The 1976 49 State cars are significantly less complicated than the 1976 California cars, but finding all the pieces you need will take some patience.  I remember that 2002AD was selling smog kits at one point and might have some of the pieces you need.  I would put a Parts Wanted ad on the FAQ and also run some Craigslist ads in San Diego, LA, and San Francisco, lots of us in Cali hoard smog components for these cars.  Here is the 1976 49 State emissions sticker referenced above.

 

Mark92131

 

 

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49 State.png

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Conserv,

 

do you have a parts list for those brackets or hoses that you used I know I can go on to partsOEM.com but not sure they will translate to new equipment?  All that equipment looks new.  Slowly making progress.  Thanks again for all your help.  

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Just a possible work around. Do you have the build date for your car? If you are lucky it might have been built before 1/1/76 and if you get the letter from BMW showing the build date in 1975 they might let you pass.  It's a long shot but before you spend countless hours trying to find all the Smog equipment and installing it I would at least give it a try. 

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11/75 is the build date and I asked that question cause I thought it might be a workaround but they said no.  it is a 1976 model and therefore, blah, blah blah.  Thanks for the thought and idea I welcome anything and everything at this point.

 

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10/75 here... in Washington, where luckily, they don't care.

I was going to try and make a quick buck, selling my pump bracket to you; since I recently removed it.

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Then I looked closer and noticed that the holes are elongated.

 

017.thumb.JPG.c01a6ccf91cf2b1daaca9b6a232b6b38.JPGNow all I have to offer is a heads up, to ask about that particular detail.

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(I was recently told that this is an early style bracket, which came to me on my '76)
Tom

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16 hours ago, JFM said:

I do have a 49-state car but need to check on the exhaust manifold.

The earlier cars had the exhaust recirculation tube coming off the rear of the exhaust manifold instead of the front like in the photos above.  Your manifold has been changed, I don't see a boss on it's front.   Feel around the rear of the manifold for a boss that may be plugged.

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Mintgrun's air pump bracket (with the worn mounting holes) are typical of what you're gonna find; in this case, "they all did it." That bracket on my '69 was worn worse than that at less than 60k miles.  Just a bad design brought on by desperation on BMW's part to meet US smog requirements.

 

Since the air pump mounts are either rubber or plastic bushed, it should be a simple matter to determine the original diameter of the mounting hole and press a sleeve into it--either plastic, brass or aluminum to align things again, and bolt up the air pump.  

 

Fortunately Ohio did away with all that inspection nonsense (except for a couple of counties) many years ago.  

 

mike

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Jimk my 5/75 car has the rear exhaust for the egr... not to hi-Jack I’m actually trying to find that tube... I’m also looking for the front air pump to exhaust check valve and pipe too... but I was under the understanding all ‘75 have the same emissions? Right?


Sent from my iPhone using Tapatalk

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No hijacking.  :).  Whatever I find will let you know.  Mine is a 11/75 but a model 76' so it is titled as a 76'  the air valve pump is found pretty easily.  I have found several places that have refurb ones. Let me know if you find any info on check valves diverter valves and pipes.  I am also looking for a 49 state exhaust manifold with a front port.

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