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Drivetrain => 1964-1967 300CI Engine => Topic started by: Aussie Skylark on February 16, 2022, 04:23:01 AM
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Hi Guys,
Could anyone with a 2bbl rochester fitted on a 300 send me a photo of the throttle spring assembly. I'm having a bit of trouble working mine out.
Thanks in advance
Marcus
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Here's a picture from the electronic service manual showing the throttle setup.
Loren
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Hi Loren,
Thanks for the diagram. I was on the right track yesterday when trying to work it out, it just didn't seem right, partly because the shell is off making it hard to hold and move the throttle.
All the photos I have seemed to miss the spring detail, photos from web searches showed springs on the carburetor actuating shafts and levers that just didn't seem right.
I don't have a dash pot for mine, it was removed before I laid eyes on the car. Can anyone advise how important they are should I be looking for one now?
Hope you enjoy teh photo.
Thanks Marcus
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Marcus,
The dash pot is important. It keeps the engine from killing if the throttle is suddenly closed. I probably have the mounting bracket for the dash pot if you need one. The dash pot can usually be found on the internet or possibly CARS Inc.
Loren
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Thanks Loren,
Can you please add the bracket to the list for when you return to Nebraska. I will see if I can get my hands on a dashpot as suggested.
Marcus
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Hi Guys,
I've found my next problem....
By installing headers to the 300 I've lost the heat stove that supplies heat to the automatic choke. Given I've had the headers ceramic coated I'm reluctant to grind off the coating to fit a heat stove. I'm considering attempting to fit one after the headers in the 2-1/4 exhaust pipe. Has anyone made this modification previously? I am also interested in what material is used to transfer heat from the exhaust to the carburetor? any tips/ photos will be appreciated.
Thanks Marcus
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Hopefully problem solved. I bought an electric heater today (didn't know they existed).
Hopefully problem solved.
It's Friday afternoon here, have a good weekend.
Marcus.
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Dear Marcus and mid-60s Buick restorers,
Hopefully problem solved. I bought an electric heater today (didn't know they existed).
. . . .
Interesting! You reminded me of my youth when my trusty wagon must have had some significant starting problems. I was too young at the time to understand what the problem was, but ultimately, my dad replaced the choke with a manual one. I suppose that didn't bother him much since he learned to drive in France after World War II when manual chokes were probably the norm. However, that would come back to haunt me because when I started to learn to drive, I would constantly forget to release the choke!
If it isn't too much of a hassle, where did you get your electric heater?
Cheers, Edouard
P.S. Thanks for the photo. You car's engine looks beautiful with that fresh paint job!
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Hi Edouard and other Readers,
I've been having some trouble with my baby 2bbl Rochester, nothing too complex just logistics and communication I'm sure everyone here has experienced.
Through word of mouth I found a guy (Paul) in our capital (Brisbane) who restores carburetors, I contacted Paul and sent mine off in the mail. A few weeks later it returned looking almost new, I put it aside until I needed it, when I pulled it from its box I noticed an idol screw was bent (assumed it was knocked about in the post), and there was a anodized steel line that was not from my carby. I contacted Paul and he asked me to return the screws, I also forgot to send the air cleaner wing nut when the carby was rebuilt so it went for a ride as well to get anodized. During this call he told me the steel line was vacuum advance but I knew this wasn't the case.
Paul sent back a repaired idol screw plus two spares, coupled with a shiny wingnut. I replaced the idol screws and sat the carby in position. Fast forward a few more weeks I went to fit the carby ready to start the motor, and could not for the life of me find the gasket that came with the carby in the first mailing. I contacted Paul, he arranged for another gasket to be sent, at this point I realized my earlier problem of the heat stove that activates the auto choke, and realized I was missing the flared backing nut that connects under the auto choke housing. Another call to Paul and he had my fitting in his workshop. At this stage I thought what's a 5 round trip to go and visit Paul to get my fitting, the new gaskets were due in Fridays mail, perfect I could get it ready to fire up over the weekend.
I drove to Brisbane on Friday afternoon and met Paul. He is a great guy, more or less retired mid 70's and had a little workshop tucked under his house, he had a beautiful 58 DeSoto parked in his workshop. He explained the mix up with the steel line he sent me, and gave me my flared nut. During our conversation I complained about my choke problems and he said, just put an electric one in they work better than the original. He then went to has spares and pulled out a little heater (wrong one for my 2bbl) and showed me how it fits in behind the auto choke cover, its a very simple element that has an earth and an ignition wire. It simply heats while ignition is on to excite the bimetallic spring in the auto choke. Paul showed me how adjust the carby when I get it going, it was a very enjoyable time. Once again my Skylark build has exposed me to another talented person I would have never otherwise met .
Paul has arranged for the heater to be send directly to my place, I should have it in a week or so, will send pics and details then.
I got home to find the gasket in the mail, opened it up and .... wrong one. Now there is a gasket and a heater coming in the mail.
Just another story in the building of a Buick Skylark in Australia.
Keep well
Marcus
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Dear Marcus and mid-60s Buick caregivers,
Through word of mouth I found a guy (Paul) in our capital (Brisbane) who restores carburetors, I contacted Paul and sent mine off in the mail.
. . . .
I drove to Brisbane on Friday afternoon and met Paul. He is a great guy, more or less retired mid 70's and had a little workshop tucked under his house.
. . . .
Once again my Skylark build has exposed me to another talented person I would have never otherwise met .
Indeed one of the great aspects of car restoration is the wonderful people you meet along the way.
. . . .
During our conversation I complained about my choke problems and he said, just put an electric one in they work better than the original.
. . . .
It simply heats while ignition is on to excite the bimetallic spring in the auto choke.
. . . .
This brought back all sorts of "fun" memories. At the limit of my memory is indeed that Biquette had problems with the choke not opening fast enough. Since twice a day she had to go a short distance to the commuter train station, the problem would repeat itself over and over depending on the air temperature. However, I never personally experienced the problem because I was just a kid at the time.
Biquette hasn't been particularly lucky with carburetors and that is one of the reasons why she now as a throttle body electronic fuel injection system. Indeed if I had been lucky enough to run across a carburetor expert like Paul, things might have turned out differently!
Thanks for sharing your story and hopefully you'll have that carburetor working and can enjoy firing up the 300 cid V-8 soon!
Cheers, Edouard :occasion14: