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#675067 - Thu Sep 02 2010 10:41 PM 235 vacuum advance question  
Ferndale53  Offline
Shop Shark
Joined: Jan 2009
Posts: 303
CT
This is probably a stupid question, but how the heck do I mount the vacuum advance on the distributor?? heres a picture of the vacuum advance I have. I've looked at the shop manual and flipped through Denny's pictures, and still couldn't figure it out. I bought the engine without a advance on it, so I never got to see how it should be.

Vac advance picture



#675092 - Fri Sep 03 2010 12:05 AM Re: 235 vacuum advance question [Re: Ferndale53]  
tclederman  Offline
Joined: Sep 2001
Posts: 24,922
Jarvisburg, NC
IInsert the distributor into the assembly and slide the assembly up the distributor post.


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 45 years
1954 3104 5-window pickup w/Hydra-Matic
Z-series (54/55) GMC 350 (2-ton) COE
If you have to stomp on your starter, either you, or your starter, or your engine, has a problem.

#675096 - Fri Sep 03 2010 12:29 AM Re: 235 vacuum advance question [Re: tclederman]  
Ferndale53  Offline
Shop Shark
Joined: Jan 2009
Posts: 303
CT
Thats exactly what I did, but nothing happens when I put vacuum to the unit. The arm can't be shoved into the advance at all. When I have the unit off the distributor, I can push the plunger in, but it pushes the clamp away from the advance, which than doesn't line up with the hole on the advance.

Last edited by Ferndale53; Fri Sep 03 2010 12:30 AM.

#675108 - Fri Sep 03 2010 01:25 AM Re: 235 vacuum advance question [Re: Ferndale53]  
tclederman  Offline
Joined: Sep 2001
Posts: 24,922
Jarvisburg, NC

From whom did you get the advance unit and what is the part number?


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 45 years
1954 3104 5-window pickup w/Hydra-Matic
Z-series (54/55) GMC 350 (2-ton) COE
If you have to stomp on your starter, either you, or your starter, or your engine, has a problem.

#675118 - Fri Sep 03 2010 02:02 AM Re: 235 vacuum advance question [Re: tclederman]  
Ferndale53  Offline
Shop Shark
Joined: Jan 2009
Posts: 303
CT
I got the advance from classic parts:
http://www.classicparts.com/1947-62-Vacuum-Advance-6-Cylinder/productinfo/83-274/

The clamp doesn't come with it, but I found one in a pile of parts that was with the truck.


#675131 - Fri Sep 03 2010 03:05 AM Re: 235 vacuum advance question [Re: Ferndale53]  
tclederman  Offline
Joined: Sep 2001
Posts: 24,922
Jarvisburg, NC

It looks to me that the unit you received is not the unit in the catalog.

Call Classic Parts and tell them you received the wrong part. If that does not work, ask to speak with a technical support person and ask him/her if you may send to them a photo of the unit you received and a photo of the unit you tried to buy.

Would someone else reading these posts look at both photos and give their opinion?



Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 45 years
1954 3104 5-window pickup w/Hydra-Matic
Z-series (54/55) GMC 350 (2-ton) COE
If you have to stomp on your starter, either you, or your starter, or your engine, has a problem.

#675142 - Fri Sep 03 2010 03:23 AM Re: 235 vacuum advance question [Re: tclederman]  
bowtietim  Offline
Shop Shark
Joined: Dec 2005
Posts: 3,300
Kansas
Looks like the collar is different to me,you might check that.


"A house is built with boards and beams,a home is built with love and dreams"

Look deep before you leep !!!

"Everything is Everything"

"If I say a mouse can pull a house,Hitch him up"

My 1951 Chevrolet 3100

My 1951 3100 Suburban

http://s69.photobucket.com/albums/i44/oldblue51/




#675156 - Fri Sep 03 2010 03:48 AM Re: 235 vacuum advance question [Re: bowtietim]  
Ferndale53  Offline
Shop Shark
Joined: Jan 2009
Posts: 303
CT
Originally Posted By bowtietim
Looks like the collar is different to me,you might check that.


I think your onto something. The '54 manual shows the curved collar like I have:
http://chevy.oldcarmanualproject.com/shop/1954truck/54ctsm0619.html

But, this thread says that the '54 manual shows the car, not truck vacuum advance

So I have a new truck vacuum advance, but the collar from a car 235.


#675160 - Fri Sep 03 2010 04:02 AM Re: 235 vacuum advance question [Re: Ferndale53]  
tclederman  Offline
Joined: Sep 2001
Posts: 24,922
Jarvisburg, NC

The back surface of the "vacuum pot" is not flat on your unit. The back surface of the original pot and the back of the unit in the Classic Parts photo is not the same as on your unit. I have bought two units from Classic Parts and they look like the photo in your catalog, not like the unit your received. I think they sent you the wrong unit.

The collar from a car is different from the collar from a truck but either one will work with the right unit (as long as you bend the vacuum line).


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 45 years
1954 3104 5-window pickup w/Hydra-Matic
Z-series (54/55) GMC 350 (2-ton) COE
If you have to stomp on your starter, either you, or your starter, or your engine, has a problem.

#675226 - Fri Sep 03 2010 12:56 PM Re: 235 vacuum advance question [Re: tclederman]  
hoyt  Offline
Shop Shark
Joined: Jun 2005
Posts: 391
Kirkwood, MO
It looks like the clamp collar might interfere with the hold-down bolt on the octane selector. Maybe a clamp from a truck and a vacuum unit for a car? The entire units can be switched (with re-positioning the vacuum tube), but can the collars be switched?
Hoyt


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