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Old 09-03-2010, 10:11 AM   #29
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Quote:
Originally Posted by richinny View Post
i bet you sleep well tonight!

LOL, you bet!
Now I know what I should have there, I can find whats missing and replace it. Now I know what was there I can figure out the correct vacuum pipework diagram and reconnect everything!

Looking closer at the book, it seems that the only difference between California and Federal smog in 1984 was an EGR and Evaporative system was fitted to California standard. In my contacts with people with 1984 Airstreams and other P30/P32 chassied M/H's some have EGR and some dont. As according to the book 1985 they all had EGR's am wondering if at some point GM just put EGR's on all their 454's regardless.
Despite the fact that others had EGR's and mine had a blanking plate, when I looked at the plate, and its bolts my gut told me that based on the rust, it had been there longer that the 5,000 miles the recent Jasper engine has covered. I assume that the intake was just swapped onto the Jasper without too much messing with it!

My only concern at this point is the Carb... the replacement does not have some of the vacuum pods/valves that maybe should be there plus the linkage fouls the aircleaner body for some reason... I will keep an eye out for an original replacement to rebuild.
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Old 09-03-2010, 01:36 PM   #30
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the numbers stamped into the carb should translate into an application/year list..... somewhere. if you post numbers, i might have a manual reference. a re-builder should have one for sure. sometimes the full vacuum port in a fitting in the manifold.
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Old 11-25-2010, 07:26 PM   #31
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Some progress... I think!

On a visit to a local junkyard, I saw a CK30 1ton Chevy truck, with a carb on the 454.
I could not find a year sticker anywhere on it, but it looked like the correct airfilter housing, with vac motor on the intake, the intake tube, and hot air pipe. I also took the Air injection pump, brackets and pipework.

At home, on the bench I started to compare the housing that was in my 345's storage but not mounted.




Clearly, for whatever reason someone sawed off the intake here...



The two are similar, but the junkyard housing does not the triple nipple vacuum valve. I decided to drill a hole for it, and make a functional and correct unit from the junkyard find, but because of the position of the breather intake, I had to drill the hole on the other side of it, to keep the pipe runs similar.
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Old 11-25-2010, 07:39 PM   #32
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Once I felt it was gonna work, I degreased, sand blasted, and derusted the housing, hot air tube, and Banks Filter top, and painted them with High Temp paint.
I then sanded the raised ring and lettering on the Banks filter top, and put a H/T Clearcoat on... but ran out, so will need to spray another coat as you can see som areas where it was too dry!




Here is the relocated valve...



And the filter/vac motor pipework in place!
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Old 11-25-2010, 07:51 PM   #33
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Then I moved on to the Smog/air pump...
This is what I got...



Stripped it down, checked, and cleaned it, then reassembled and regreased the bearings. Brackets are cleaned and painted.
The front pulley was bent, so I straightened that out, and it seems to run true and the pump seems smooth.

Here is my progress with the air injection tubes I got from Rockauto(One is black, so I will paint the other to match).



And with the pipes as the should run.

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Old 11-25-2010, 08:13 PM   #34
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After spending time looking at all of the Vac diagrams, this one is what I am fixed on..
Its the one provided by Kmpro, and its on his 1984 310... but interestingly, the sticker is dated 1983...


It seems to match what I have and what I should have..

Now, this is where I get concerned...
My Carb is not a Quadrajet.. and so does not have the vac pods that seem to be needed to complete the vac diagram.
Here is the Quadrajet I have, that does seem to have all the correct pods and the vac ports seem to be in the right places...




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Old 12-01-2010, 04:02 PM   #35
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Oh my!
Now its getting better by the day!
My research into the Carb issue took me to a great website, but I was still concerned/confused, so I Emailed them...


On 30/11/2010 1:27 PM, key stephen wrote:
Hi,
Found you great site a big help, but need some help!

I have a 1984 Airstream Motorhome(16,500lb GVW) that is built on a Chevy Chassis with a 454 BBC.
The Engine is 49 state smog(Not California), so is non electronic(no computer), and no cats, but does have smog pump and exhaust air injection.
I live in California, and so to register, I have to pass smog... and to do that I have to have "all of the original smog equipment" in place.

Somewhere is the past, the OEM carb was replaced with a Edelbrock carb... and it runs great, but it does not have all of the "Emissions parts", like the vacuum pods, so I need to replace it.

I have a Quadrajet that "looks correct" as it has the "Vacuum Throttle Lever Actuator" and the "Secondary Vacuum Break pod" as shown in the Emission vacuum diagram I have. It has an "electric choke".
The carb number stamped on the side is:
17082123044CPW
I have been unable to find out anything about its original application, even your website is unclear!

So, my questions are:
1/ Is this Carb viable for my Airstream?
2/ If so, I want to do a complete rebuild, so what would I need?

Thanks in advance, and if you need any more info or photos, please ask, as I am confused and lost!

Stephen

24hrs later I got my answer... I hope it will help others!

Hi

If the number is 17085212 then it's the correct carburetor for the application. 17085212 is a Rochester M4MEF which was used from late '84 onwards for heavy duty applications with the 454.

For a rebuild you would need:

kit CK368: http://www.carburetor.ca/carbs/kits/CK368.htm
float F11: http://www.carburetor.ca/carbs/floats/f11.htm

If the vacuum break and choke coil need replacing, these are:
VB81: http://www.carburetor.ca/carbs/vacbreak/VB081.htm
and
CC143: http://www.carburetor.ca/carbs/chokes/CC143.htm

Regards,

Rusty


Rusty Petrovicwww.carburetor.ca


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Old 02-16-2011, 07:00 PM   #36
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Time for an update again...
A complete rebuild kit/float/filter for the Carb is almost with me, and I spent some time scrubbing it to remove the grit and crap from the outside to make the rebuild cleaner.

I have been slowly tracking down all of the correct componants to make me "Smog Complient".

One pic on my thread made me puzzle...
There was something screwed into the thermostat housing... looked like a sensor, but it was snapped off flush.
Outlined in yellow...


Eventually I ID's the part... and its function too!
It is a coolant temperature controlled vacuum port that only allows vacuum to the Smog pump(and therefore energizing it) when the engine is warmed
From the Haynes manual for my Suburban...


A trip to the Junkyard yesterday yielded the correct part!


I brought it home and applied Vacuum to the port and it held...
Immersing it in boiling water... It opened and the port flows!
Happy Bunny!
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Old 04-20-2011, 02:19 PM   #37
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More progress....
Amassed all my stuff for the Quadrajet rebuild....


Boom!







Glad I did it...
Lots of crud in the float bowl...



And the bit that has me held up...
The Quadrajets Achilles heel...



Worn primary throttle shaft bushing..
You could feel the slop, so sent off for a bushing kit...
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Old 04-20-2011, 05:22 PM   #38
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make sure you also replace the floats. i think there also are plugs somewhere in the bowl that tend to drip. i might have this mixed up with a different carb and if i do someone else will hopefully chime in. you already found the shaft issue ;-)
:-)
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Old 04-20-2011, 07:04 PM   #39
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Float is in packet central in first pic.
Yes, you are correct about the plugs leaking.... but the later carbs were much better, and and mine look fine.
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Old 04-20-2011, 10:39 PM   #40
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:-)
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Old 04-24-2011, 08:23 PM   #41
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Progress on the Quadrajet...

Here is the plugs in the lower body.



The Reamer and bushing kit arrived, so I did that today...

Reamed out the shaft hole about 12 mm or 1/2" deep...


The brass bushing was Red Loctited..


And driven in just under the external body..


That done, I cleaned the body again and shot a coat of High Temp paint.


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Old 04-24-2011, 09:21 PM   #42
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Good Job

Thank You

Good information
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